Will Deacon a40aa36a69 bpf: Fix mask generation for 32-bit narrow loads of 64-bit fields ... commit 0613d8ca9a upstream. A narrow load from a 64-bit context field results in a 64-bit load followed potentially by a 64-bit right-shift and then a bitwise AND operation to extract the relevant data. In the case of a 32-bit access, an immediate mask of 0xffffffff is used to construct a 64-bit BPP_AND operation which then sign-extends the mask value and effectively acts as a glorified no-op. For example: 0: 61 10 00 00 00 00 00 00 r0 = *(u32 *)(r1 + 0) results in the following code generation for a 64-bit field: ldr x7, [x7] // 64-bit load mov x10, #0xffffffffffffffff and x7, x7, x10 Fix the mask generation so that narrow loads always perform a 32-bit AND operation: ldr x7, [x7] // 64-bit load mov w10, #0xffffffff and w7, w7, w10 Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Krzesimir Nowak <krzesimir@kinvolk.io> Cc: Andrey Ignatov <rdna@fb.com> Acked-by: Yonghong Song <yhs@fb.com> Fixes: 31fd85816d ("bpf: permits narrower load from bpf program context fields") Signed-off-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20230518102528.1341-1-will@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-05-30 12:42:14 +01:00
..
bpf	bpf: Fix mask generation for 32-bit narrow loads of 64-bit fields	2023-05-30 12:42:14 +01:00
cgroup	cgroup/cpuset: Wake up cpuset_attach_wq tasks in cpuset_cancel_attach()	2023-04-20 12:04:40 +02:00
configs
debug	kdb: Make memory allocations more robust	2021-03-04 09:39:31 +01:00
dma	swiotlb: skip swiotlb_bounce when orig_addr is zero	2022-07-02 16:27:40 +02:00
events	perf/core: Fix hardlockup failure caused by perf throttle	2023-05-17 11:13:18 +02:00
gcov	gcov: add support for checksum field	2023-01-18 11:30:39 +01:00
irq	irqdomain: Drop bogus fwspec-mapping error handling	2023-03-11 16:31:52 +01:00
livepatch	livepatch: fix race between fork and KLP transition	2022-10-26 13:19:23 +02:00
locking	locking/lockdep: Avoid RCU-induced noinstr fail	2021-11-26 11:36:04 +01:00
power	PM: hibernate: Allow hybrid sleep to work with s2idle	2022-11-03 23:52:31 +09:00
printk	printk: fix return value of printk.devkmsg __setup handler	2022-04-15 14:14:45 +02:00
rcu	rcu: Suppress smp_processor_id() complaint in synchronize_rcu_expedited_wait()	2023-03-11 16:31:45 +01:00
sched	sched_getaffinity: don't assume 'cpumask_size()' is fully initialized	2023-04-05 11:15:39 +02:00
time	tick/nohz: Fix cpu_is_hotpluggable() by checking with nohz subsystem	2023-05-17 11:13:22 +02:00
trace	ring-buffer: Sync IRQ works before buffer destruction	2023-05-17 11:13:07 +02:00
.gitignore
acct.c	acct: fix potential integer overflow in encode_comp_t()	2023-01-18 11:30:34 +01:00
async.c	Revert "module, async: async_synchronize_full() on module init iff async is used"	2022-02-23 11:58:38 +01:00
audit.c	audit: improve audit queue handling when "audit=1" on cmdline	2022-02-08 18:23:13 +01:00
audit.h	audit: fix a net reference leak in audit_list_rules_send()	2020-06-22 09:05:13 +02:00
audit_fsnotify.c	audit: fix potential double free on error path from fsnotify_add_inode_mark	2022-09-05 10:26:28 +02:00
audit_tree.c	audit: Embed key into chunk	2019-12-13 08:51:11 +01:00
audit_watch.c	audit: CONFIG_CHANGE don't log internal bookkeeping as an event	2020-10-01 13:14:33 +02:00
auditfilter.c	audit: fix a net reference leak in audit_list_rules_send()	2020-06-22 09:05:13 +02:00
auditsc.c	audit: print empty EXECVE args	2019-12-01 09:17:17 +01:00
backtracetest.c
bounds.c	kbuild: fix kernel/bounds.c 'W=1' warning	2018-11-13 11:08:47 -08:00
capability.c	LSM: generalize flag passing to security_capable	2020-01-23 08:21:29 +01:00
compat.c	sched_getaffinity: don't assume 'cpumask_size()' is fully initialized	2023-04-05 11:15:39 +02:00
configs.c
context_tracking.c
cpu.c	random: clear fast pool, crng, and batches in cpuhp bring up	2022-06-25 11:49:07 +02:00
cpu_pm.c	kernel/cpu_pm: Fix uninitted local in cpu_pm	2020-06-22 09:05:28 +02:00
crash_core.c
crash_dump.c
cred.c	memcg: account security cred as well to kmemcg	2020-01-09 10:19:00 +01:00
delayacct.c
dma.c
exec_domain.c
exit.c	exit: Use READ_ONCE() for all oops/warn limit reads	2023-02-06 07:49:46 +01:00
extable.c
fail_function.c	fail_function: Remove a redundant mutex unlock	2020-11-24 13:27:23 +01:00
fork.c	mm/hugetlb: initialize hugetlb_usage in mm_init	2021-09-22 11:48:09 +02:00
freezer.c
futex.c	mm, futex: fix shared futex pgoff on shmem huge page	2021-07-11 12:49:30 +02:00
groups.c
hung_task.c	kernel: hung_task.c: disable on suspend	2019-04-20 09:16:02 +02:00
iomem.c
irq_work.c	irq_work: Do not raise an IPI when queueing work on the local CPU	2019-05-31 06:46:19 -07:00
jump_label.c	locking/static_key: Fix false positive warnings on concurrent dec/inc	2021-03-04 09:39:30 +01:00
kallsyms.c	kallsyms: Refactor kallsyms_show_value() to take cred	2020-07-16 08:17:26 +02:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kernel/kcov.c: mark write_comp_data() as notrace	2019-02-12 19:47:20 +01:00
kexec.c
kexec_core.c	kernel: kexec: remove the lock operation of system_transition_mutex	2021-02-03 23:23:23 +01:00
kexec_file.c	kexec_file: drop weak attribute from arch_kexec_apply_relocations[_add]	2022-07-02 16:27:39 +02:00
kexec_internal.h
kmod.c	kmod: make request_module() return an error when autoloading is disabled	2020-04-17 10:48:52 +02:00
kprobes.c	x86/kprobes: Fix arch_check_optimized_kprobe check within optimized_kprobe range	2023-03-11 16:31:51 +01:00
ksysfs.c
kthread.c	kthread: prevent deadlock when kthread_mod_delayed_work() races with kthread_cancel_delayed_work_sync()	2021-07-11 12:49:31 +02:00
latencytop.c
Makefile	elfcore: fix building with clang	2021-02-10 09:21:06 +01:00
memremap.c	mm/memory_hotplug: shrink zones when offlining memory	2020-01-29 16:43:27 +01:00
module-internal.h
module.c	module: Don't wait for GOING modules	2023-02-06 07:49:41 +01:00
module_signing.c
notifier.c	x86/mm: split vmalloc_sync_all()	2020-03-25 08:06:13 +01:00
nsproxy.c
padata.c	padata: add separate cpuhp node for CPUHP_PADATA_DEAD	2021-08-08 08:54:30 +02:00
panic.c	exit: Use READ_ONCE() for all oops/warn limit reads	2023-02-06 07:49:46 +01:00
params.c
pid.c	Fix failure path in alloc_pid()	2019-01-13 09:51:06 +01:00
pid_namespace.c	memcg: enable accounting for pids in nested pid namespaces	2021-09-22 11:48:09 +02:00
profile.c	profiling: fix shift too large makes kernel panic	2022-08-25 11:15:20 +02:00
ptrace.c	ptrace: Reimplement PTRACE_KILL by always sending SIGKILL	2022-06-14 16:59:14 +02:00
range.c
reboot.c	reboot: fix overflow parsing reboot cpu number	2020-11-18 19:18:52 +01:00
relay.c	relayfs: fix out-of-bounds access in relay_file_read	2023-05-17 11:13:23 +02:00
resource.c	resource: fix locking in find_next_iomem_res()	2019-09-16 08:22:20 +02:00
rseq.c
seccomp.c	seccomp: Invalidate seccomp mode to catch death failures	2022-02-16 12:51:47 +01:00
signal.c	signal handling: don't use BUG_ON() for debugging	2022-07-21 21:09:32 +02:00
smp.c	smp: Fix offline cpu check in flush_smp_call_function_queue()	2022-04-20 09:12:50 +02:00
smpboot.c	kthread: Extract KTHREAD_IS_PER_CPU	2021-02-07 14:48:38 +01:00
smpboot.h
softirq.c
stacktrace.c
stop_machine.c
sys.c	prlimit: do_prlimit needs to have a speculation check	2023-01-24 07:11:49 +01:00
sys_ni.c	kernel/sys_ni: add compat entry for fadvise64_64	2022-09-05 10:26:28 +02:00
sysctl.c	proc: proc_skip_spaces() shouldn't think it is working on C strings	2022-12-08 11:18:32 +01:00
sysctl_binary.c
task_work.c
taskstats.c	taskstats: fix data-race	2020-01-09 10:18:59 +01:00
test_kprobes.c
torture.c
tracepoint.c	tracepoint: Add tracepoint_probe_register_may_exist() for BPF tracing	2021-07-20 16:15:42 +02:00
tsacct.c	taskstats: Cleanup the use of task->exit_code	2022-02-23 11:58:39 +01:00
ucount.c
uid16.c
uid16.h
umh.c	usermodehelper: reset umask to default before executing user process	2020-10-14 10:31:21 +02:00
up.c	smp: Fix smp_call_function_single_async prototype	2021-05-22 10:59:39 +02:00
user-return-notifier.c
user.c
user_namespace.c	userns: also map extents in the reverse map to kernel IDs	2018-11-13 11:09:00 -08:00
utsname.c
utsname_sysctl.c
watchdog.c	watchdog: export lockup_detector_reconfigure	2022-08-25 11:15:46 +02:00
watchdog_hld.c
workqueue.c	workqueue: don't skip lockdep work dependency in cancel_work_sync()	2022-09-28 11:02:58 +02:00
workqueue_internal.h