IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
vivid-003: kernel_thread() failed
8021q: adding VLAN 0 to HW filter on device batadv0
vivid-003: kernel_thread() failed
==================================================================
BUG: KASAN: use-after-free in __vb2_perform_fileio+0xddf/0xeb0 drivers/media/v4l2-core/videobuf2-core.c:2379
Read of size 4 at addr ffff8880992b5e5c by task syz-executor.1/7360
CPU: 0 PID: 7360 Comm: syz-executor.1 Not tainted 4.14.114 #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x138/0x19c lib/dump_stack.c:53
print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report mm/kasan/report.c:409 [inline]
kasan_report.cold+0xaf/0x2b5 mm/kasan/report.c:393
__asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429
__vb2_perform_fileio+0xddf/0xeb0 drivers/media/v4l2-core/videobuf2-core.c:2379
vb2_read+0x3b/0x50 drivers/media/v4l2-core/videobuf2-core.c:2490
vb2_fop_read+0x1f5/0x3e0 drivers/media/v4l2-core/videobuf2-v4l2.c:895
v4l2_read+0x1ac/0x210 drivers/media/v4l2-core/v4l2-dev.c:309
__vfs_read+0x107/0x6b0 fs/read_write.c:411
vfs_read+0x137/0x350 fs/read_write.c:447
SYSC_pread64 fs/read_write.c:611 [inline]
SyS_pread64+0x115/0x140 fs/read_write.c:598
do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458da9
RSP: 002b:00007f71f15c9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000011
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458da9
RDX: 0000000000000090 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f71f15ca6d4
R13: 00000000004c5af4 R14: 00000000004d9e30 R15: 00000000ffffffff
Allocated by task 7358:
save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
save_stack+0x45/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc mm/kasan/kasan.c:551 [inline]
kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
kmem_cache_alloc_trace+0x152/0x790 mm/slab.c:3618
kmalloc include/linux/slab.h:488 [inline]
kzalloc include/linux/slab.h:661 [inline]
__vb2_init_fileio+0x182/0xa90 drivers/media/v4l2-core/videobuf2-core.c:2224
__vb2_perform_fileio+0x9f0/0xeb0 drivers/media/v4l2-core/videobuf2-core.c:2358
vb2_read+0x3b/0x50 drivers/media/v4l2-core/videobuf2-core.c:2490
vb2_fop_read+0x1f5/0x3e0 drivers/media/v4l2-core/videobuf2-v4l2.c:895
v4l2_read+0x1ac/0x210 drivers/media/v4l2-core/v4l2-dev.c:309
__vfs_read+0x107/0x6b0 fs/read_write.c:411
vfs_read+0x137/0x350 fs/read_write.c:447
SYSC_pread64 fs/read_write.c:611 [inline]
SyS_pread64+0x115/0x140 fs/read_write.c:598
do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7
Freed by task 7352:
save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
save_stack+0x45/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3496 [inline]
kfree+0xcc/0x270 mm/slab.c:3815
__vb2_cleanup_fileio+0xfc/0x150 drivers/media/v4l2-core/videobuf2-core.c:2317
vb2_core_queue_release+0x1d/0x80 drivers/media/v4l2-core/videobuf2-core.c:2040
vb2_queue_release drivers/media/v4l2-core/videobuf2-v4l2.c:669 [inline]
_vb2_fop_release+0x1cf/0x2a0 drivers/media/v4l2-core/videobuf2-v4l2.c:840
vb2_fop_release+0x75/0xc0 drivers/media/v4l2-core/videobuf2-v4l2.c:854
vivid_fop_release+0x180/0x3f0 drivers/media/platform/vivid/vivid-core.c:486
v4l2_release+0xfb/0x190 drivers/media/v4l2-core/v4l2-dev.c:446
__fput+0x277/0x7a0 fs/file_table.c:210
____fput+0x16/0x20 fs/file_table.c:244
task_work_run+0x119/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:163
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:267 [inline]
do_syscall_64+0x4a9/0x630 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x42/0xb7
The buggy address belongs to the object at ffff8880992b5b40
which belongs to the cache kmalloc-1024 of size 1024
The buggy address is located 796 bytes inside of
1024-byte region [ffff8880992b5b40, ffff8880992b5f40)
The buggy address belongs to the page:
page:ffffea000264ad00 count:1 mapcount:0 mapping:ffff8880992b4040 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000008100(slab|head)
raw: 01fffc0000008100 ffff8880992b4040 0000000000000000 0000000100000007
raw: ffffea00026384a0 ffffea00025be6a0 ffff8880aa800ac0 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880992b5d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880992b5d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880992b5e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880992b5e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880992b5f00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================