Tatsuhiko Yasumatsu f34bcd10c4 bpf: Fix integer overflow in prealloc_elems_and_freelist() ... [ Upstream commit 30e29a9a2b ] In prealloc_elems_and_freelist(), the multiplication to calculate the size passed to bpf_map_area_alloc() could lead to an integer overflow. As a result, out-of-bounds write could occur in pcpu_freelist_populate() as reported by KASAN: [...] [ 16.968613] BUG: KASAN: slab-out-of-bounds in pcpu_freelist_populate+0xd9/0x100 [ 16.969408] Write of size 8 at addr ffff888104fc6ea0 by task crash/78 [ 16.970038] [ 16.970195] CPU: 0 PID: 78 Comm: crash Not tainted 5.15.0-rc2+ #1 [ 16.970878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 [ 16.972026] Call Trace: [ 16.972306] dump_stack_lvl+0x34/0x44 [ 16.972687] print_address_description.constprop.0+0x21/0x140 [ 16.973297] ? pcpu_freelist_populate+0xd9/0x100 [ 16.973777] ? pcpu_freelist_populate+0xd9/0x100 [ 16.974257] kasan_report.cold+0x7f/0x11b [ 16.974681] ? pcpu_freelist_populate+0xd9/0x100 [ 16.975190] pcpu_freelist_populate+0xd9/0x100 [ 16.975669] stack_map_alloc+0x209/0x2a0 [ 16.976106] __sys_bpf+0xd83/0x2ce0 [...] The possibility of this overflow was originally discussed in [0], but was overlooked. Fix the integer overflow by changing elem_size to u64 from u32. [0] https://lore.kernel.org/bpf/728b238e-a481-eb50-98e9-b0f430ab01e7@gmail.com/ Fixes: 557c0c6e7d ("bpf: convert stackmap to pre-allocation") Signed-off-by: Tatsuhiko Yasumatsu <th.yasumatsu@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210930135545.173698-1-th.yasumatsu@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-10-17 10:08:32 +02:00
..
bpf	bpf: Fix integer overflow in prealloc_elems_and_freelist()	2021-10-17 10:08:32 +02:00
cgroup	cgroup1: don't allow '\n' in renaming	2021-06-16 11:53:02 +02:00
configs	ANDROID: binder: add hwbinder,vndbinder to BINDER_DEVICES.	2017-08-22 18:43:23 -07:00
debug	kdb: Make memory allocations more robust	2021-03-03 18:22:36 +01:00
events	events: Reuse value read using READ_ONCE instead of re-reading it	2021-09-22 11:45:33 +02:00
gcov	gcov: add support for GCC 10.1	2020-09-23 10:46:32 +02:00
irq	genirq: Disable interrupts for force threaded handlers	2021-03-24 11:05:06 +01:00
livepatch	livepatch: Nullify obj->mod in klp_module_coming()'s error path	2019-10-07 18:55:09 +02:00
locking	rtmutex: Remove unused argument from rt_mutex_proxy_unlock()	2021-01-30 13:31:16 +01:00
power	PM: hibernate: remove the bogus call to get_gendisk() in software_resume()	2020-10-29 09:07:16 +01:00
printk	printk: fix deadlock when kernel panic	2021-03-03 18:22:55 +01:00
rcu	rcu: Fix missed wakeup of exp_wq waiters	2021-09-26 13:37:28 +02:00
sched	cpufreq: schedutil: Use kobject release() method to free sugov_tunables	2021-10-06 15:05:08 +02:00
time	posix-timers: Preserve return value in clock_adjtime32()	2021-05-22 10:57:22 +02:00
trace	blktrace: Fix uaf in blk_trace access after removing by sysfs	2021-10-06 15:05:06 +02:00
.gitignore
acct.c	kernel/acct.c: fix the acct->needcheck check in check_free_space()	2018-01-10 09:31:17 +01:00
async.c	kernel/async.c: revert "async: simplify lowest_in_progress()"	2018-02-16 20:23:05 +01:00
audit.c	audit: fix a net reference leak in audit_list_rules_send()	2020-06-20 10:25:10 +02:00
audit.h	audit: fix a net reference leak in audit_list_rules_send()	2020-06-20 10:25:10 +02:00
audit_fsnotify.c
audit_tree.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
audit_watch.c	audit: CONFIG_CHANGE don't log internal bookkeeping as an event	2020-10-01 13:12:33 +02:00
auditfilter.c	audit: fix a net reference leak in audit_list_rules_send()	2020-06-20 10:25:10 +02:00
auditsc.c	audit: print empty EXECVE args	2019-12-01 09:14:03 +01:00
backtracetest.c
bounds.c	kbuild: fix kernel/bounds.c 'W=1' warning	2018-11-13 11:15:08 -08:00
capability.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compat.c	make 'user_access_begin()' do 'access_ok()'	2020-06-20 10:24:58 +02:00
configs.c
context_tracking.c
cpu.c	cpu/hotplug: Cure the cpusets trainwreck	2021-07-20 16:17:46 +02:00
cpu_pm.c	kernel/cpu_pm: Fix uninitted local in cpu_pm	2020-06-20 10:25:19 +02:00
crash_core.c	kdump: write correct address of mem_section into vmcoreinfo	2018-01-17 09:45:27 +01:00
crash_dump.c
cred.c	memcg: account security cred as well to kmemcg	2020-01-09 10:17:54 +01:00
delayacct.c	delayacct: Use raw_spinlocks	2018-08-03 07:50:38 +02:00
dma.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
exec_domain.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
exit.c	don't dump the threads that had been already exiting when zapped.	2020-11-18 18:27:58 +01:00
extable.c	extable: Enable RCU if it is not watching in kernel_text_address()	2017-09-23 16:50:20 -04:00
fork.c	mm/hugetlb: initialize hugetlb_usage in mm_init	2021-09-22 11:45:32 +02:00
freezer.c
futex.c	mm, futex: fix shared futex pgoff on shmem huge page	2021-07-11 12:48:12 +02:00
groups.c	kernel: make groups_sort calling a responsibility group_info allocators	2017-12-20 10:10:18 +01:00
hung_task.c	kernel: hung_task.c: disable on suspend	2019-04-20 09:15:05 +02:00
irq_work.c
jump_label.c	sched/core: Fix cpu.max vs. cpuhotplug deadlock	2018-12-05 19:41:17 +01:00
kallsyms.c	kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol	2019-09-21 07:15:38 +02:00
kcmp.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: ensure irq code sees a valid area	2018-08-03 07:50:22 +02:00
kexec.c
kexec_core.c	kexec: Allocate decrypted control pages for kdump if SME is enabled	2019-11-24 08:23:15 +01:00
kexec_file.c	kernel: kexec_file: fix error return code of kexec_calculate_store_digests()	2021-05-22 10:57:39 +02:00
kexec_internal.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
kmod.c	kmod: make request_module() return an error when autoloading is disabled	2020-04-24 08:00:44 +02:00
kprobes.c	kretprobe: Avoid re-registration of the same kretprobe earlier	2021-02-10 09:12:09 +01:00
ksysfs.c
kthread.c	kthread: prevent deadlock when kthread_mod_delayed_work() races with kthread_cancel_delayed_work_sync()	2021-07-11 12:48:13 +02:00
latencytop.c
Makefile	elfcore: fix building with clang	2021-02-10 09:12:08 +01:00
memremap.c	mm, devm_memremap_pages: kill mapping "System RAM" support	2019-01-13 10:01:02 +01:00
module-internal.h
module.c	modules: inherit TAINT_PROPRIETARY_MODULE	2021-05-22 10:57:24 +02:00
module_signing.c
notifier.c	x86/mm: split vmalloc_sync_all()	2020-04-02 16:34:20 +02:00
nsproxy.c
padata.c	padata: purge get_cpu and reorder_via_wq from padata_do_serial	2020-05-27 16:43:05 +02:00
panic.c	panic: ensure preemption is disabled during panic()	2019-10-17 13:43:19 -07:00
params.c	kernel/params.c: improve STANDARD_PARAM_DEF readability	2017-10-03 17:54:26 -07:00
pid.c	pids: make task_tgid_nr_ns() safe	2017-08-21 12:47:31 -07:00
pid_namespace.c	memcg: enable accounting for pids in nested pid namespaces	2021-09-22 11:45:32 +02:00
profile.c	profiling: fix shift-out-of-bounds bugs	2021-09-26 13:37:28 +02:00
ptrace.c	ptrace: make ptrace() fail if the tracee changed its pid unexpectedly	2021-05-26 11:46:58 +02:00
range.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
reboot.c	reboot: fix overflow parsing reboot cpu number	2020-11-18 18:28:02 +01:00
relay.c	kernel/relay.c: fix memleak on destroy relay channel	2020-08-26 10:29:54 +02:00
resource.c	resource: fix integer overflow at reallocation	2018-04-24 09:36:22 +02:00
seccomp.c	seccomp: Add missing return in non-void function	2021-03-03 18:22:53 +01:00
signal.c	signal: Extend exec_id to 64bits	2020-04-24 08:00:38 +02:00
smp.c	smp: Fix smp_call_function_single_async prototype	2021-05-22 10:57:35 +02:00
smpboot.c	kthread: Extract KTHREAD_IS_PER_CPU	2021-02-07 14:47:41 +01:00
smpboot.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
softirq.c	Mark HI and TASKLET softirq synchronous	2018-08-15 18:12:47 +02:00
stacktrace.c
stop_machine.c	stop_machine: Atomically queue and wake stopper threads	2018-09-05 09:26:36 +02:00
sys.c	prctl: allow to setup brk for et_dyn executables	2021-09-26 13:37:28 +02:00
sys_ni.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sysctl.c	kernel: sysctl: make drop_caches write-only	2020-01-04 13:59:57 +01:00
sysctl_binary.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
task_work.c	locking/barriers: Convert users of lockless_dereference() to READ_ONCE()	2017-12-25 14:26:21 +01:00
taskstats.c	taskstats: fix data-race	2020-01-09 10:17:53 +01:00
test_kprobes.c
torture.c	torture: Fix typo suppressing CPU-hotplug statistics	2017-07-25 13:04:45 -07:00
tracepoint.c	tracepoint: Do not fail unregistering a probe due to memory failure	2021-03-03 18:22:47 +01:00
tsacct.c
ucount.c
uid16.c	kernel: make groups_sort calling a responsibility group_info allocators	2017-12-20 10:10:18 +01:00
umh.c	usermodehelper: reset umask to default before executing user process	2020-10-14 09:51:10 +02:00
up.c	smp: Fix smp_call_function_single_async prototype	2021-05-22 10:57:35 +02:00
user-return-notifier.c
user.c
user_namespace.c	userns: move user access out of the mutex	2018-09-09 19:56:00 +02:00
utsname.c
utsname_sysctl.c	sys: don't hold uts_sem while accessing userspace memory	2018-09-09 19:56:00 +02:00
watchdog.c	watchdog/softlockup: Enforce that timestamp is valid on boot	2020-02-28 16:36:05 +01:00
watchdog_hld.c	watchdog: Mark watchdog touch functions as notrace	2018-09-05 09:26:42 +02:00
workqueue.c	workqueue: fix UAF in pwq_unbound_release_workfn()	2021-08-04 12:22:14 +02:00
workqueue_internal.h	Merge branch 'for-4.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2017-11-06 12:26:49 -08:00