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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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selftests/bpf: verifier/unpriv converted to inline assembly
Test verifier/unpriv semi-automatically converted to use inline assembly. The verifier/unpriv.c had to be split in two parts: - the bulk of the tests is in the progs/verifier_unpriv.c; - the single test that needs `struct bpf_perf_event_data` definition is in the progs/verifier_unpriv_perf.c. The tests above can't be in a single file because: - first requires inclusion of the filter.h header (to get access to BPF_ST_MEM macro, inline assembler does not support this isntruction); - the second requires vmlinux.h, which contains definitions conflicting with filter.h. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20230421174234.2391278-23-eddyz87@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Eduard Zingerman
Alexei Starovoitov
parent
81d1d6dd40
commit
82887c2568
4 changed files with 764 additions and 562 deletions
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@ -56,6 +56,8 @@
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#include "verifier_stack_ptr.skel.h"
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#include "verifier_subreg.skel.h"
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#include "verifier_uninit.skel.h"
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#include "verifier_unpriv.skel.h"
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#include "verifier_unpriv_perf.skel.h"
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#include "verifier_value_adj_spill.skel.h"
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#include "verifier_value.skel.h"
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#include "verifier_value_or_null.skel.h"
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@ -150,6 +152,8 @@ void test_verifier_spin_lock(void) { RUN(verifier_spin_lock); }
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void test_verifier_stack_ptr(void) { RUN(verifier_stack_ptr); }
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void test_verifier_subreg(void) { RUN(verifier_subreg); }
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void test_verifier_uninit(void) { RUN(verifier_uninit); }
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void test_verifier_unpriv(void) { RUN(verifier_unpriv); }
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void test_verifier_unpriv_perf(void) { RUN(verifier_unpriv_perf); }
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void test_verifier_value_adj_spill(void) { RUN(verifier_value_adj_spill); }
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void test_verifier_value(void) { RUN(verifier_value); }
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void test_verifier_value_or_null(void) { RUN(verifier_value_or_null); }
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726
tools/testing/selftests/bpf/progs/verifier_unpriv.c
Normal file
726
tools/testing/selftests/bpf/progs/verifier_unpriv.c
Normal file
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@ -0,0 +1,726 @@
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// SPDX-License-Identifier: GPL-2.0
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/* Converted from tools/testing/selftests/bpf/verifier/unpriv.c */
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include "../../../include/linux/filter.h"
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#include "bpf_misc.h"
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#define BPF_SK_LOOKUP(func) \
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/* struct bpf_sock_tuple tuple = {} */ \
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"r2 = 0;" \
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"*(u32*)(r10 - 8) = r2;" \
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"*(u64*)(r10 - 16) = r2;" \
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"*(u64*)(r10 - 24) = r2;" \
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"*(u64*)(r10 - 32) = r2;" \
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"*(u64*)(r10 - 40) = r2;" \
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"*(u64*)(r10 - 48) = r2;" \
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/* sk = func(ctx, &tuple, sizeof tuple, 0, 0) */ \
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"r2 = r10;" \
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"r2 += -48;" \
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"r3 = %[sizeof_bpf_sock_tuple];"\
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"r4 = 0;" \
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"r5 = 0;" \
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"call %[" #func "];"
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struct {
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__uint(type, BPF_MAP_TYPE_HASH);
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__uint(max_entries, 1);
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__type(key, long long);
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__type(value, long long);
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} map_hash_8b SEC(".maps");
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void dummy_prog_42_socket(void);
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void dummy_prog_24_socket(void);
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void dummy_prog_loop1_socket(void);
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struct {
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__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
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__uint(max_entries, 4);
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__uint(key_size, sizeof(int));
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__array(values, void (void));
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} map_prog1_socket SEC(".maps") = {
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.values = {
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[0] = (void *)&dummy_prog_42_socket,
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[1] = (void *)&dummy_prog_loop1_socket,
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[2] = (void *)&dummy_prog_24_socket,
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},
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};
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SEC("socket")
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__auxiliary __auxiliary_unpriv
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__naked void dummy_prog_42_socket(void)
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{
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asm volatile ("r0 = 42; exit;");
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}
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SEC("socket")
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__auxiliary __auxiliary_unpriv
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__naked void dummy_prog_24_socket(void)
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{
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asm volatile ("r0 = 24; exit;");
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}
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SEC("socket")
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__auxiliary __auxiliary_unpriv
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__naked void dummy_prog_loop1_socket(void)
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{
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asm volatile (" \
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r3 = 1; \
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r2 = %[map_prog1_socket] ll; \
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call %[bpf_tail_call]; \
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r0 = 41; \
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exit; \
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" :
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: __imm(bpf_tail_call),
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__imm_addr(map_prog1_socket)
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: __clobber_all);
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}
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SEC("socket")
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__description("unpriv: return pointer")
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__success __failure_unpriv __msg_unpriv("R0 leaks addr")
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__retval(POINTER_VALUE)
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__naked void unpriv_return_pointer(void)
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{
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asm volatile (" \
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r0 = r10; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("unpriv: add const to pointer")
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__success __success_unpriv __retval(0)
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__naked void unpriv_add_const_to_pointer(void)
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{
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asm volatile (" \
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r1 += 8; \
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r0 = 0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("unpriv: add pointer to pointer")
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__failure __msg("R1 pointer += pointer")
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__failure_unpriv
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__naked void unpriv_add_pointer_to_pointer(void)
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{
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asm volatile (" \
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r1 += r10; \
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r0 = 0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("unpriv: neg pointer")
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__success __failure_unpriv __msg_unpriv("R1 pointer arithmetic")
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__retval(0)
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__naked void unpriv_neg_pointer(void)
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{
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asm volatile (" \
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r1 = -r1; \
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r0 = 0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("unpriv: cmp pointer with const")
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__success __failure_unpriv __msg_unpriv("R1 pointer comparison")
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__retval(0)
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__naked void unpriv_cmp_pointer_with_const(void)
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{
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asm volatile (" \
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if r1 == 0 goto l0_%=; \
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l0_%=: r0 = 0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("unpriv: cmp pointer with pointer")
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__success __failure_unpriv __msg_unpriv("R10 pointer comparison")
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__retval(0)
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__naked void unpriv_cmp_pointer_with_pointer(void)
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{
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asm volatile (" \
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if r1 == r10 goto l0_%=; \
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l0_%=: r0 = 0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("tracepoint")
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__description("unpriv: check that printk is disallowed")
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__success
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__naked void check_that_printk_is_disallowed(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r1 = r10; \
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r1 += -8; \
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r2 = 8; \
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r3 = r1; \
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call %[bpf_trace_printk]; \
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r0 = 0; \
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exit; \
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" :
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: __imm(bpf_trace_printk)
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: __clobber_all);
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}
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SEC("socket")
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__description("unpriv: pass pointer to helper function")
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__success __failure_unpriv __msg_unpriv("R4 leaks addr")
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__retval(0)
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__naked void pass_pointer_to_helper_function(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_8b] ll; \
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r3 = r2; \
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r4 = r2; \
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call %[bpf_map_update_elem]; \
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r0 = 0; \
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exit; \
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" :
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: __imm(bpf_map_update_elem),
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__imm_addr(map_hash_8b)
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: __clobber_all);
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}
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SEC("socket")
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__description("unpriv: indirectly pass pointer on stack to helper function")
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__success __failure_unpriv
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__msg_unpriv("invalid indirect read from stack R2 off -8+0 size 8")
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__retval(0)
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__naked void on_stack_to_helper_function(void)
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{
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asm volatile (" \
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*(u64*)(r10 - 8) = r10; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_8b] ll; \
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call %[bpf_map_lookup_elem]; \
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r0 = 0; \
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exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_8b)
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: __clobber_all);
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}
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SEC("socket")
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__description("unpriv: mangle pointer on stack 1")
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__success __failure_unpriv __msg_unpriv("attempt to corrupt spilled")
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__retval(0)
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__naked void mangle_pointer_on_stack_1(void)
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{
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asm volatile (" \
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*(u64*)(r10 - 8) = r10; \
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r0 = 0; \
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*(u32*)(r10 - 8) = r0; \
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r0 = 0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("unpriv: mangle pointer on stack 2")
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__success __failure_unpriv __msg_unpriv("attempt to corrupt spilled")
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__retval(0)
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__naked void mangle_pointer_on_stack_2(void)
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{
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asm volatile (" \
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*(u64*)(r10 - 8) = r10; \
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r0 = 0; \
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*(u8*)(r10 - 1) = r0; \
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r0 = 0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("unpriv: read pointer from stack in small chunks")
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__failure __msg("invalid size")
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__failure_unpriv
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__naked void from_stack_in_small_chunks(void)
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{
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asm volatile (" \
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*(u64*)(r10 - 8) = r10; \
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r0 = *(u32*)(r10 - 8); \
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r0 = 0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("unpriv: write pointer into ctx")
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__failure __msg("invalid bpf_context access")
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__failure_unpriv __msg_unpriv("R1 leaks addr")
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__naked void unpriv_write_pointer_into_ctx(void)
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{
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asm volatile (" \
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*(u64*)(r1 + 0) = r1; \
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r0 = 0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("unpriv: spill/fill of ctx")
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__success __success_unpriv __retval(0)
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__naked void unpriv_spill_fill_of_ctx(void)
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{
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asm volatile (" \
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r6 = r10; \
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r6 += -8; \
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*(u64*)(r6 + 0) = r1; \
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r1 = *(u64*)(r6 + 0); \
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r0 = 0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("tc")
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__description("unpriv: spill/fill of ctx 2")
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__success __retval(0)
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__naked void spill_fill_of_ctx_2(void)
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{
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asm volatile (" \
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r6 = r10; \
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r6 += -8; \
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*(u64*)(r6 + 0) = r1; \
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r1 = *(u64*)(r6 + 0); \
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call %[bpf_get_hash_recalc]; \
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r0 = 0; \
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exit; \
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" :
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: __imm(bpf_get_hash_recalc)
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: __clobber_all);
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}
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SEC("tc")
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__description("unpriv: spill/fill of ctx 3")
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__failure __msg("R1 type=fp expected=ctx")
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__naked void spill_fill_of_ctx_3(void)
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{
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asm volatile (" \
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r6 = r10; \
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r6 += -8; \
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*(u64*)(r6 + 0) = r1; \
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*(u64*)(r6 + 0) = r10; \
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r1 = *(u64*)(r6 + 0); \
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call %[bpf_get_hash_recalc]; \
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exit; \
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" :
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: __imm(bpf_get_hash_recalc)
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: __clobber_all);
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}
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SEC("tc")
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__description("unpriv: spill/fill of ctx 4")
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__failure __msg("R1 type=scalar expected=ctx")
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__naked void spill_fill_of_ctx_4(void)
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{
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asm volatile (" \
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r6 = r10; \
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r6 += -8; \
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*(u64*)(r6 + 0) = r1; \
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r0 = 1; \
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lock *(u64 *)(r10 - 8) += r0; \
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r1 = *(u64*)(r6 + 0); \
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call %[bpf_get_hash_recalc]; \
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exit; \
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" :
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: __imm(bpf_get_hash_recalc)
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: __clobber_all);
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}
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SEC("tc")
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__description("unpriv: spill/fill of different pointers stx")
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__failure __msg("same insn cannot be used with different pointers")
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__naked void fill_of_different_pointers_stx(void)
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{
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asm volatile (" \
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r3 = 42; \
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r6 = r10; \
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r6 += -8; \
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if r1 == 0 goto l0_%=; \
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r2 = r10; \
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r2 += -16; \
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*(u64*)(r6 + 0) = r2; \
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l0_%=: if r1 != 0 goto l1_%=; \
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*(u64*)(r6 + 0) = r1; \
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l1_%=: r1 = *(u64*)(r6 + 0); \
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*(u32*)(r1 + %[__sk_buff_mark]) = r3; \
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r0 = 0; \
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exit; \
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" :
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: __imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark))
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: __clobber_all);
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}
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/* Same as above, but use BPF_ST_MEM to save 42
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* instead of BPF_STX_MEM.
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*/
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SEC("tc")
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__description("unpriv: spill/fill of different pointers st")
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__failure __msg("same insn cannot be used with different pointers")
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__naked void fill_of_different_pointers_st(void)
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{
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asm volatile (" \
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r6 = r10; \
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r6 += -8; \
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if r1 == 0 goto l0_%=; \
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r2 = r10; \
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r2 += -16; \
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*(u64*)(r6 + 0) = r2; \
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l0_%=: if r1 != 0 goto l1_%=; \
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*(u64*)(r6 + 0) = r1; \
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l1_%=: r1 = *(u64*)(r6 + 0); \
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.8byte %[st_mem]; \
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r0 = 0; \
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exit; \
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" :
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: __imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark)),
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__imm_insn(st_mem,
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BPF_ST_MEM(BPF_W, BPF_REG_1, offsetof(struct __sk_buff, mark), 42))
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: __clobber_all);
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}
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SEC("tc")
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__description("unpriv: spill/fill of different pointers stx - ctx and sock")
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__failure __msg("type=ctx expected=sock")
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__naked void pointers_stx_ctx_and_sock(void)
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{
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asm volatile (" \
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r8 = r1; \
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/* struct bpf_sock *sock = bpf_sock_lookup(...); */\
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" BPF_SK_LOOKUP(bpf_sk_lookup_tcp)
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" r2 = r0; \
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/* u64 foo; */ \
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/* void *target = &foo; */ \
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r6 = r10; \
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r6 += -8; \
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r1 = r8; \
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/* if (skb == NULL) *target = sock; */ \
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if r1 == 0 goto l0_%=; \
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*(u64*)(r6 + 0) = r2; \
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l0_%=: /* else *target = skb; */ \
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if r1 != 0 goto l1_%=; \
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*(u64*)(r6 + 0) = r1; \
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l1_%=: /* struct __sk_buff *skb = *target; */ \
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r1 = *(u64*)(r6 + 0); \
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/* skb->mark = 42; */ \
|
||||
r3 = 42; \
|
||||
*(u32*)(r1 + %[__sk_buff_mark]) = r3; \
|
||||
/* if (sk) bpf_sk_release(sk) */ \
|
||||
if r1 == 0 goto l2_%=; \
|
||||
call %[bpf_sk_release]; \
|
||||
l2_%=: r0 = 0; \
|
||||
exit; \
|
||||
" :
|
||||
: __imm(bpf_sk_lookup_tcp),
|
||||
__imm(bpf_sk_release),
|
||||
__imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark)),
|
||||
__imm_const(sizeof_bpf_sock_tuple, sizeof(struct bpf_sock_tuple))
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("tc")
|
||||
__description("unpriv: spill/fill of different pointers stx - leak sock")
|
||||
__failure
|
||||
//.errstr = "same insn cannot be used with different pointers",
|
||||
__msg("Unreleased reference")
|
||||
__naked void different_pointers_stx_leak_sock(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r8 = r1; \
|
||||
/* struct bpf_sock *sock = bpf_sock_lookup(...); */\
|
||||
" BPF_SK_LOOKUP(bpf_sk_lookup_tcp)
|
||||
" r2 = r0; \
|
||||
/* u64 foo; */ \
|
||||
/* void *target = &foo; */ \
|
||||
r6 = r10; \
|
||||
r6 += -8; \
|
||||
r1 = r8; \
|
||||
/* if (skb == NULL) *target = sock; */ \
|
||||
if r1 == 0 goto l0_%=; \
|
||||
*(u64*)(r6 + 0) = r2; \
|
||||
l0_%=: /* else *target = skb; */ \
|
||||
if r1 != 0 goto l1_%=; \
|
||||
*(u64*)(r6 + 0) = r1; \
|
||||
l1_%=: /* struct __sk_buff *skb = *target; */ \
|
||||
r1 = *(u64*)(r6 + 0); \
|
||||
/* skb->mark = 42; */ \
|
||||
r3 = 42; \
|
||||
*(u32*)(r1 + %[__sk_buff_mark]) = r3; \
|
||||
exit; \
|
||||
" :
|
||||
: __imm(bpf_sk_lookup_tcp),
|
||||
__imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark)),
|
||||
__imm_const(sizeof_bpf_sock_tuple, sizeof(struct bpf_sock_tuple))
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("tc")
|
||||
__description("unpriv: spill/fill of different pointers stx - sock and ctx (read)")
|
||||
__failure __msg("same insn cannot be used with different pointers")
|
||||
__naked void stx_sock_and_ctx_read(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r8 = r1; \
|
||||
/* struct bpf_sock *sock = bpf_sock_lookup(...); */\
|
||||
" BPF_SK_LOOKUP(bpf_sk_lookup_tcp)
|
||||
" r2 = r0; \
|
||||
/* u64 foo; */ \
|
||||
/* void *target = &foo; */ \
|
||||
r6 = r10; \
|
||||
r6 += -8; \
|
||||
r1 = r8; \
|
||||
/* if (skb) *target = skb */ \
|
||||
if r1 == 0 goto l0_%=; \
|
||||
*(u64*)(r6 + 0) = r1; \
|
||||
l0_%=: /* else *target = sock */ \
|
||||
if r1 != 0 goto l1_%=; \
|
||||
*(u64*)(r6 + 0) = r2; \
|
||||
l1_%=: /* struct bpf_sock *sk = *target; */ \
|
||||
r1 = *(u64*)(r6 + 0); \
|
||||
/* if (sk) u32 foo = sk->mark; bpf_sk_release(sk); */\
|
||||
if r1 == 0 goto l2_%=; \
|
||||
r3 = *(u32*)(r1 + %[bpf_sock_mark]); \
|
||||
call %[bpf_sk_release]; \
|
||||
l2_%=: r0 = 0; \
|
||||
exit; \
|
||||
" :
|
||||
: __imm(bpf_sk_lookup_tcp),
|
||||
__imm(bpf_sk_release),
|
||||
__imm_const(bpf_sock_mark, offsetof(struct bpf_sock, mark)),
|
||||
__imm_const(sizeof_bpf_sock_tuple, sizeof(struct bpf_sock_tuple))
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("tc")
|
||||
__description("unpriv: spill/fill of different pointers stx - sock and ctx (write)")
|
||||
__failure
|
||||
//.errstr = "same insn cannot be used with different pointers",
|
||||
__msg("cannot write into sock")
|
||||
__naked void stx_sock_and_ctx_write(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r8 = r1; \
|
||||
/* struct bpf_sock *sock = bpf_sock_lookup(...); */\
|
||||
" BPF_SK_LOOKUP(bpf_sk_lookup_tcp)
|
||||
" r2 = r0; \
|
||||
/* u64 foo; */ \
|
||||
/* void *target = &foo; */ \
|
||||
r6 = r10; \
|
||||
r6 += -8; \
|
||||
r1 = r8; \
|
||||
/* if (skb) *target = skb */ \
|
||||
if r1 == 0 goto l0_%=; \
|
||||
*(u64*)(r6 + 0) = r1; \
|
||||
l0_%=: /* else *target = sock */ \
|
||||
if r1 != 0 goto l1_%=; \
|
||||
*(u64*)(r6 + 0) = r2; \
|
||||
l1_%=: /* struct bpf_sock *sk = *target; */ \
|
||||
r1 = *(u64*)(r6 + 0); \
|
||||
/* if (sk) sk->mark = 42; bpf_sk_release(sk); */\
|
||||
if r1 == 0 goto l2_%=; \
|
||||
r3 = 42; \
|
||||
*(u32*)(r1 + %[bpf_sock_mark]) = r3; \
|
||||
call %[bpf_sk_release]; \
|
||||
l2_%=: r0 = 0; \
|
||||
exit; \
|
||||
" :
|
||||
: __imm(bpf_sk_lookup_tcp),
|
||||
__imm(bpf_sk_release),
|
||||
__imm_const(bpf_sock_mark, offsetof(struct bpf_sock, mark)),
|
||||
__imm_const(sizeof_bpf_sock_tuple, sizeof(struct bpf_sock_tuple))
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("socket")
|
||||
__description("unpriv: write pointer into map elem value")
|
||||
__success __failure_unpriv __msg_unpriv("R0 leaks addr")
|
||||
__retval(0)
|
||||
__naked void pointer_into_map_elem_value(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r1 = 0; \
|
||||
*(u64*)(r10 - 8) = r1; \
|
||||
r2 = r10; \
|
||||
r2 += -8; \
|
||||
r1 = %[map_hash_8b] ll; \
|
||||
call %[bpf_map_lookup_elem]; \
|
||||
if r0 == 0 goto l0_%=; \
|
||||
*(u64*)(r0 + 0) = r0; \
|
||||
l0_%=: exit; \
|
||||
" :
|
||||
: __imm(bpf_map_lookup_elem),
|
||||
__imm_addr(map_hash_8b)
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("socket")
|
||||
__description("alu32: mov u32 const")
|
||||
__success __failure_unpriv __msg_unpriv("R7 invalid mem access 'scalar'")
|
||||
__retval(0)
|
||||
__naked void alu32_mov_u32_const(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
w7 = 0; \
|
||||
w7 &= 1; \
|
||||
w0 = w7; \
|
||||
if r0 == 0 goto l0_%=; \
|
||||
r0 = *(u64*)(r7 + 0); \
|
||||
l0_%=: exit; \
|
||||
" ::: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("socket")
|
||||
__description("unpriv: partial copy of pointer")
|
||||
__success __failure_unpriv __msg_unpriv("R10 partial copy")
|
||||
__retval(0)
|
||||
__naked void unpriv_partial_copy_of_pointer(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
w1 = w10; \
|
||||
r0 = 0; \
|
||||
exit; \
|
||||
" ::: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("socket")
|
||||
__description("unpriv: pass pointer to tail_call")
|
||||
__success __failure_unpriv __msg_unpriv("R3 leaks addr into helper")
|
||||
__retval(0)
|
||||
__naked void pass_pointer_to_tail_call(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r3 = r1; \
|
||||
r2 = %[map_prog1_socket] ll; \
|
||||
call %[bpf_tail_call]; \
|
||||
r0 = 0; \
|
||||
exit; \
|
||||
" :
|
||||
: __imm(bpf_tail_call),
|
||||
__imm_addr(map_prog1_socket)
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("socket")
|
||||
__description("unpriv: cmp map pointer with zero")
|
||||
__success __failure_unpriv __msg_unpriv("R1 pointer comparison")
|
||||
__retval(0)
|
||||
__naked void cmp_map_pointer_with_zero(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r1 = 0; \
|
||||
r1 = %[map_hash_8b] ll; \
|
||||
if r1 == 0 goto l0_%=; \
|
||||
l0_%=: r0 = 0; \
|
||||
exit; \
|
||||
" :
|
||||
: __imm_addr(map_hash_8b)
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("socket")
|
||||
__description("unpriv: write into frame pointer")
|
||||
__failure __msg("frame pointer is read only")
|
||||
__failure_unpriv
|
||||
__naked void unpriv_write_into_frame_pointer(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r10 = r1; \
|
||||
r0 = 0; \
|
||||
exit; \
|
||||
" ::: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("socket")
|
||||
__description("unpriv: spill/fill frame pointer")
|
||||
__failure __msg("frame pointer is read only")
|
||||
__failure_unpriv
|
||||
__naked void unpriv_spill_fill_frame_pointer(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r6 = r10; \
|
||||
r6 += -8; \
|
||||
*(u64*)(r6 + 0) = r10; \
|
||||
r10 = *(u64*)(r6 + 0); \
|
||||
r0 = 0; \
|
||||
exit; \
|
||||
" ::: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("socket")
|
||||
__description("unpriv: cmp of frame pointer")
|
||||
__success __failure_unpriv __msg_unpriv("R10 pointer comparison")
|
||||
__retval(0)
|
||||
__naked void unpriv_cmp_of_frame_pointer(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
if r10 == 0 goto l0_%=; \
|
||||
l0_%=: r0 = 0; \
|
||||
exit; \
|
||||
" ::: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("socket")
|
||||
__description("unpriv: adding of fp, reg")
|
||||
__success __failure_unpriv
|
||||
__msg_unpriv("R1 stack pointer arithmetic goes out of range")
|
||||
__retval(0)
|
||||
__naked void unpriv_adding_of_fp_reg(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r0 = 0; \
|
||||
r1 = 0; \
|
||||
r1 += r10; \
|
||||
*(u64*)(r1 - 8) = r0; \
|
||||
exit; \
|
||||
" ::: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("socket")
|
||||
__description("unpriv: adding of fp, imm")
|
||||
__success __failure_unpriv
|
||||
__msg_unpriv("R1 stack pointer arithmetic goes out of range")
|
||||
__retval(0)
|
||||
__naked void unpriv_adding_of_fp_imm(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r0 = 0; \
|
||||
r1 = r10; \
|
||||
r1 += 0; \
|
||||
*(u64*)(r1 - 8) = r0; \
|
||||
exit; \
|
||||
" ::: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("socket")
|
||||
__description("unpriv: cmp of stack pointer")
|
||||
__success __failure_unpriv __msg_unpriv("R2 pointer comparison")
|
||||
__retval(0)
|
||||
__naked void unpriv_cmp_of_stack_pointer(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r2 = r10; \
|
||||
r2 += -8; \
|
||||
if r2 == 0 goto l0_%=; \
|
||||
l0_%=: r0 = 0; \
|
||||
exit; \
|
||||
" ::: __clobber_all);
|
||||
}
|
||||
|
||||
char _license[] SEC("license") = "GPL";
|
||||
34
tools/testing/selftests/bpf/progs/verifier_unpriv_perf.c
Normal file
34
tools/testing/selftests/bpf/progs/verifier_unpriv_perf.c
Normal file
|
|
@ -0,0 +1,34 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
/* Converted from tools/testing/selftests/bpf/verifier/unpriv.c */
|
||||
|
||||
#include "vmlinux.h"
|
||||
#include <bpf/bpf_helpers.h>
|
||||
#include "bpf_misc.h"
|
||||
|
||||
SEC("perf_event")
|
||||
__description("unpriv: spill/fill of different pointers ldx")
|
||||
__failure __msg("same insn cannot be used with different pointers")
|
||||
__naked void fill_of_different_pointers_ldx(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r6 = r10; \
|
||||
r6 += -8; \
|
||||
if r1 == 0 goto l0_%=; \
|
||||
r2 = r10; \
|
||||
r2 += %[__imm_0]; \
|
||||
*(u64*)(r6 + 0) = r2; \
|
||||
l0_%=: if r1 != 0 goto l1_%=; \
|
||||
*(u64*)(r6 + 0) = r1; \
|
||||
l1_%=: r1 = *(u64*)(r6 + 0); \
|
||||
r1 = *(u64*)(r1 + %[sample_period]); \
|
||||
r0 = 0; \
|
||||
exit; \
|
||||
" :
|
||||
: __imm_const(__imm_0,
|
||||
-(__s32) offsetof(struct bpf_perf_event_data, sample_period) - 8),
|
||||
__imm_const(sample_period,
|
||||
offsetof(struct bpf_perf_event_data, sample_period))
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
char _license[] SEC("license") = "GPL";
|
||||
|
|
@ -1,562 +0,0 @@
|
|||
{
|
||||
"unpriv: return pointer",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_0, BPF_REG_10),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.result_unpriv = REJECT,
|
||||
.errstr_unpriv = "R0 leaks addr",
|
||||
.retval = POINTER_VALUE,
|
||||
},
|
||||
{
|
||||
"unpriv: add const to pointer",
|
||||
.insns = {
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 8),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"unpriv: add pointer to pointer",
|
||||
.insns = {
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_10),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "R1 pointer += pointer",
|
||||
},
|
||||
{
|
||||
"unpriv: neg pointer",
|
||||
.insns = {
|
||||
BPF_ALU64_IMM(BPF_NEG, BPF_REG_1, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.result_unpriv = REJECT,
|
||||
.errstr_unpriv = "R1 pointer arithmetic",
|
||||
},
|
||||
{
|
||||
"unpriv: cmp pointer with const",
|
||||
.insns = {
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.result_unpriv = REJECT,
|
||||
.errstr_unpriv = "R1 pointer comparison",
|
||||
},
|
||||
{
|
||||
"unpriv: cmp pointer with pointer",
|
||||
.insns = {
|
||||
BPF_JMP_REG(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.result_unpriv = REJECT,
|
||||
.errstr_unpriv = "R10 pointer comparison",
|
||||
},
|
||||
{
|
||||
"unpriv: check that printk is disallowed",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_MOV64_IMM(BPF_REG_2, 8),
|
||||
BPF_MOV64_REG(BPF_REG_3, BPF_REG_1),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_trace_printk),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "unknown func bpf_trace_printk#6",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
},
|
||||
{
|
||||
"unpriv: pass pointer to helper function",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_MOV64_REG(BPF_REG_3, BPF_REG_2),
|
||||
BPF_MOV64_REG(BPF_REG_4, BPF_REG_2),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_update_elem),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.errstr_unpriv = "R4 leaks addr",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"unpriv: indirectly pass pointer on stack to helper function",
|
||||
.insns = {
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_10, -8),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.errstr_unpriv = "invalid indirect read from stack R2 off -8+0 size 8",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"unpriv: mangle pointer on stack 1",
|
||||
.insns = {
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_10, -8),
|
||||
BPF_ST_MEM(BPF_W, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "attempt to corrupt spilled",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"unpriv: mangle pointer on stack 2",
|
||||
.insns = {
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_10, -8),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_10, -1, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "attempt to corrupt spilled",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"unpriv: read pointer from stack in small chunks",
|
||||
.insns = {
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_10, -8),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_10, -8),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr = "invalid size",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"unpriv: write pointer into ctx",
|
||||
.insns = {
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_1, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R1 leaks addr",
|
||||
.result_unpriv = REJECT,
|
||||
.errstr = "invalid bpf_context access",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"unpriv: spill/fill of ctx",
|
||||
.insns = {
|
||||
BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"unpriv: spill/fill of ctx 2",
|
||||
.insns = {
|
||||
BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_hash_recalc),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
},
|
||||
{
|
||||
"unpriv: spill/fill of ctx 3",
|
||||
.insns = {
|
||||
BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_10, 0),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_hash_recalc),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "R1 type=fp expected=ctx",
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
},
|
||||
{
|
||||
"unpriv: spill/fill of ctx 4",
|
||||
.insns = {
|
||||
BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 1),
|
||||
BPF_RAW_INSN(BPF_STX | BPF_ATOMIC | BPF_DW,
|
||||
BPF_REG_10, BPF_REG_0, -8, BPF_ADD),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_hash_recalc),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "R1 type=scalar expected=ctx",
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
},
|
||||
{
|
||||
"unpriv: spill/fill of different pointers stx",
|
||||
.insns = {
|
||||
BPF_MOV64_IMM(BPF_REG_3, 42),
|
||||
BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
|
||||
BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3,
|
||||
offsetof(struct __sk_buff, mark)),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "same insn cannot be used with different pointers",
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
},
|
||||
{
|
||||
/* Same as above, but use BPF_ST_MEM to save 42
|
||||
* instead of BPF_STX_MEM.
|
||||
*/
|
||||
"unpriv: spill/fill of different pointers st",
|
||||
.insns = {
|
||||
BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
|
||||
BPF_ST_MEM(BPF_W, BPF_REG_1, offsetof(struct __sk_buff, mark), 42),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "same insn cannot be used with different pointers",
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
},
|
||||
{
|
||||
"unpriv: spill/fill of different pointers stx - ctx and sock",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_8, BPF_REG_1),
|
||||
/* struct bpf_sock *sock = bpf_sock_lookup(...); */
|
||||
BPF_SK_LOOKUP(sk_lookup_tcp),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
|
||||
/* u64 foo; */
|
||||
/* void *target = &foo; */
|
||||
BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
|
||||
/* if (skb == NULL) *target = sock; */
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0),
|
||||
/* else *target = skb; */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
|
||||
/* struct __sk_buff *skb = *target; */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
|
||||
/* skb->mark = 42; */
|
||||
BPF_MOV64_IMM(BPF_REG_3, 42),
|
||||
BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3,
|
||||
offsetof(struct __sk_buff, mark)),
|
||||
/* if (sk) bpf_sk_release(sk) */
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
|
||||
BPF_EMIT_CALL(BPF_FUNC_sk_release),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "type=ctx expected=sock",
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
},
|
||||
{
|
||||
"unpriv: spill/fill of different pointers stx - leak sock",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_8, BPF_REG_1),
|
||||
/* struct bpf_sock *sock = bpf_sock_lookup(...); */
|
||||
BPF_SK_LOOKUP(sk_lookup_tcp),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
|
||||
/* u64 foo; */
|
||||
/* void *target = &foo; */
|
||||
BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
|
||||
/* if (skb == NULL) *target = sock; */
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0),
|
||||
/* else *target = skb; */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
|
||||
/* struct __sk_buff *skb = *target; */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
|
||||
/* skb->mark = 42; */
|
||||
BPF_MOV64_IMM(BPF_REG_3, 42),
|
||||
BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3,
|
||||
offsetof(struct __sk_buff, mark)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
//.errstr = "same insn cannot be used with different pointers",
|
||||
.errstr = "Unreleased reference",
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
},
|
||||
{
|
||||
"unpriv: spill/fill of different pointers stx - sock and ctx (read)",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_8, BPF_REG_1),
|
||||
/* struct bpf_sock *sock = bpf_sock_lookup(...); */
|
||||
BPF_SK_LOOKUP(sk_lookup_tcp),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
|
||||
/* u64 foo; */
|
||||
/* void *target = &foo; */
|
||||
BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
|
||||
/* if (skb) *target = skb */
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
|
||||
/* else *target = sock */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0),
|
||||
/* struct bpf_sock *sk = *target; */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
|
||||
/* if (sk) u32 foo = sk->mark; bpf_sk_release(sk); */
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 2),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
|
||||
offsetof(struct bpf_sock, mark)),
|
||||
BPF_EMIT_CALL(BPF_FUNC_sk_release),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "same insn cannot be used with different pointers",
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
},
|
||||
{
|
||||
"unpriv: spill/fill of different pointers stx - sock and ctx (write)",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_8, BPF_REG_1),
|
||||
/* struct bpf_sock *sock = bpf_sock_lookup(...); */
|
||||
BPF_SK_LOOKUP(sk_lookup_tcp),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
|
||||
/* u64 foo; */
|
||||
/* void *target = &foo; */
|
||||
BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
|
||||
/* if (skb) *target = skb */
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
|
||||
/* else *target = sock */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0),
|
||||
/* struct bpf_sock *sk = *target; */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
|
||||
/* if (sk) sk->mark = 42; bpf_sk_release(sk); */
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3),
|
||||
BPF_MOV64_IMM(BPF_REG_3, 42),
|
||||
BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3,
|
||||
offsetof(struct bpf_sock, mark)),
|
||||
BPF_EMIT_CALL(BPF_FUNC_sk_release),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
//.errstr = "same insn cannot be used with different pointers",
|
||||
.errstr = "cannot write into sock",
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
},
|
||||
{
|
||||
"unpriv: spill/fill of different pointers ldx",
|
||||
.insns = {
|
||||
BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2,
|
||||
-(__s32)offsetof(struct bpf_perf_event_data,
|
||||
sample_period) - 8),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_1,
|
||||
offsetof(struct bpf_perf_event_data, sample_period)),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "same insn cannot be used with different pointers",
|
||||
.prog_type = BPF_PROG_TYPE_PERF_EVENT,
|
||||
},
|
||||
{
|
||||
"unpriv: write pointer into map elem value",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.errstr_unpriv = "R0 leaks addr",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"alu32: mov u32 const",
|
||||
.insns = {
|
||||
BPF_MOV32_IMM(BPF_REG_7, 0),
|
||||
BPF_ALU32_IMM(BPF_AND, BPF_REG_7, 1),
|
||||
BPF_MOV32_REG(BPF_REG_0, BPF_REG_7),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_7, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R7 invalid mem access 'scalar'",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
.retval = 0,
|
||||
},
|
||||
{
|
||||
"unpriv: partial copy of pointer",
|
||||
.insns = {
|
||||
BPF_MOV32_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R10 partial copy",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"unpriv: pass pointer to tail_call",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_3, BPF_REG_1),
|
||||
BPF_LD_MAP_FD(BPF_REG_2, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_tail_call),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_prog1 = { 1 },
|
||||
.errstr_unpriv = "R3 leaks addr into helper",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"unpriv: cmp map pointer with zero",
|
||||
.insns = {
|
||||
BPF_MOV64_IMM(BPF_REG_1, 0),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 1 },
|
||||
.errstr_unpriv = "R1 pointer comparison",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"unpriv: write into frame pointer",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_10, BPF_REG_1),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr = "frame pointer is read only",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"unpriv: spill/fill frame pointer",
|
||||
.insns = {
|
||||
BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_10, 0),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr = "frame pointer is read only",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"unpriv: cmp of frame pointer",
|
||||
.insns = {
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_10, 0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R10 pointer comparison",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"unpriv: adding of fp, reg",
|
||||
.insns = {
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_1, 0),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_10),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, -8),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"unpriv: adding of fp, imm",
|
||||
.insns = {
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, -8),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"unpriv: cmp of stack pointer",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_2, 0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R2 pointer comparison",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
Loading…
Reference in a new issue