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| author | Walter Wu <[email protected]> | 2020-12-29 23:14:46 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2020-12-29 23:36:49 +0000 |
| commit | 13384f6125ad7ebdcc8914fe1e03ded48ce76581 (patch) | |
| tree | cae4018d6848478cb6fcbb1f312e2e21044d7ee0 /lib/genalloc.c | |
| parent | mm: generalise COW SMC TLB flushing race comment (diff) | |
| download | kernel-13384f6125ad7ebdcc8914fe1e03ded48ce76581.tar.gz kernel-13384f6125ad7ebdcc8914fe1e03ded48ce76581.zip | |
kasan: fix null pointer dereference in kasan_record_aux_stack
Syzbot reported the following [1]:
BUG: kernel NULL pointer dereference, address: 0000000000000008
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 2d993067 P4D 2d993067 PUD 19a3c067 PMD 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3852 Comm: kworker/1:2 Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events free_ipc
RIP: 0010:kasan_record_aux_stack+0x77/0xb0
Add null checking slab object from kasan_get_alloc_meta() in order to
avoid null pointer dereference.
[1] https://syzkaller.appspot.com/x/log.txt?x=10a82a50d00000
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Walter Wu <[email protected]>
Suggested-by: Dmitry Vyukov <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Andrey Konovalov <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/genalloc.c')
0 files changed, 0 insertions, 0 deletions