IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
8021q: adding VLAN 0 to HW filter on device batadv0
vivid-000: kernel_thread() failed
==================================================================
BUG: KASAN: use-after-free in __vb2_perform_fileio+0x10fd/0x12b0 drivers/media/v4l2-core/videobuf2-core.c:2379
Read of size 4 at addr ffff8880981427dc by task syz-executor.1/7106

CPU: 1 PID: 7106 Comm: syz-executor.1 Not tainted 4.14.164-syzkaller #0
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+0xf7/0x13b lib/dump_stack.c:58
 print_address_description.cold.7+0x9/0x1c9 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report.cold.8+0x11a/0x2d3 mm/kasan/report.c:409
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429
 __vb2_perform_fileio+0x10fd/0x12b0 drivers/media/v4l2-core/videobuf2-core.c:2379
 vb2_read+0xf/0x20 drivers/media/v4l2-core/videobuf2-core.c:2490
 vb2_fop_read+0x1b6/0x390 drivers/media/v4l2-core/videobuf2-v4l2.c:895
 v4l2_read+0x133/0x240 drivers/media/v4l2-core/v4l2-dev.c:309
 __vfs_read+0xdb/0x840 fs/read_write.c:411
 vfs_read+0xf5/0x300 fs/read_write.c:447
 SYSC_read fs/read_write.c:574 [inline]
 SyS_read+0x100/0x250 fs/read_write.c:567
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a219
RSP: 002b:00007f7ba35acc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a219
RDX: 000000000000008a RSI: 0000000020000100 RDI: 0000000000000005
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7ba35ad6d4
R13: 00000000004c7bb4 R14: 00000000004ddc18 R15: 00000000ffffffff

Allocated by task 7104:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:551
 kmem_cache_alloc_trace+0x152/0x7a0 mm/slab.c:3618
 kmalloc include/linux/slab.h:488 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 __vb2_init_fileio+0x160/0xaf0 drivers/media/v4l2-core/videobuf2-core.c:2224
 __vb2_perform_fileio+0xa9f/0x12b0 drivers/media/v4l2-core/videobuf2-core.c:2358
 vb2_read+0xf/0x20 drivers/media/v4l2-core/videobuf2-core.c:2490
 vb2_fop_read+0x1b6/0x390 drivers/media/v4l2-core/videobuf2-v4l2.c:895
 v4l2_read+0x133/0x240 drivers/media/v4l2-core/v4l2-dev.c:309
 __vfs_read+0xdb/0x840 fs/read_write.c:411
 vfs_read+0xf5/0x300 fs/read_write.c:447
 SYSC_read fs/read_write.c:574 [inline]
 SyS_read+0x100/0x250 fs/read_write.c:567
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 7096:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xcc/0x270 mm/slab.c:3815
 __vb2_cleanup_fileio+0xee/0x140 drivers/media/v4l2-core/videobuf2-core.c:2317
 vb2_core_queue_release+0xf/0x70 drivers/media/v4l2-core/videobuf2-core.c:2040
 vb2_queue_release drivers/media/v4l2-core/videobuf2-v4l2.c:669 [inline]
 _vb2_fop_release+0x1ac/0x280 drivers/media/v4l2-core/videobuf2-v4l2.c:840
 vb2_fop_release+0x66/0xd0 drivers/media/v4l2-core/videobuf2-v4l2.c:854
 vivid_fop_release+0x15f/0x3a0 drivers/media/platform/vivid/vivid-core.c:486
 v4l2_release+0xeb/0x1a0 drivers/media/v4l2-core/v4l2-dev.c:446
 __fput+0x232/0x750 fs/file_table.c:210
 ____fput+0x9/0x10 fs/file_table.c:244
 task_work_run+0xe5/0x170 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x16a/0x1b0 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x416/0x5b0 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

The buggy address belongs to the object at ffff8880981424c0
 which belongs to the cache kmalloc-1024 of size 1024
The buggy address is located 796 bytes inside of
 1024-byte region [ffff8880981424c0, ffff8880981428c0)
The buggy address belongs to the page:
page:ffffea0002605080 count:1 mapcount:0 mapping:ffff888098142040 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000008100(slab|head)
raw: 01fffc0000008100 ffff888098142040 0000000000000000 0000000100000007
raw: ffffea00026eb0a0 ffffea00022cd9a0 ffff8880aa800ac0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888098142680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888098142700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888098142780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                    ^
 ffff888098142800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888098142880: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================