kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 19568 Comm: syz-executor.4 Not tainted 4.14.131 #25 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880808ba6c0 task.stack: ffff88805ccc8000 RIP: 0010:vb2_vmalloc_put_userptr+0x6e/0x210 drivers/media/v4l2-core/videobuf2-vmalloc.c:136 RSP: 0018:ffff88805cccfc18 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffffc9001513a000 RCX: 1ffffffff0da724c RDX: 0000000000000001 RSI: ffff888086b56354 RDI: 0000000000000009 RBP: ffff88805cccfc40 R08: dffffc0000000000 R09: ffffffff88c855a0 R10: ffff88805cccfcd0 R11: ffff8880808ba6c0 R12: ffff888093d7e980 R13: 0000000000000000 R14: ffff888093d7e980 R15: ffff888093d7e988 FS: 0000000000e48940(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff12d510000 CR3: 000000005f565000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __vb2_buf_userptr_put drivers/media/v4l2-core/videobuf2-core.c:256 [inline] __vb2_free_mem drivers/media/v4l2-core/videobuf2-core.c:413 [inline] __vb2_queue_free+0x3a8/0x7d0 drivers/media/v4l2-core/videobuf2-core.c:454 vb2_core_queue_release+0x64/0x80 drivers/media/v4l2-core/videobuf2-core.c:2043 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+0xf9/0x190 drivers/media/v4l2-core/v4l2-dev.c:446 __fput+0x275/0x7a0 fs/file_table.c:210 ____fput+0x16/0x20 fs/file_table.c:244 task_work_run+0x114/0x190 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: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+0x4bc/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4134b1 RSP: 002b:00007ffc5611fef0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00000000004134b1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 000000006e783fbb R09: 000000006e783fbf R10: 00007ffc5611ffd0 R11: 0000000000000293 R12: 000000000075bf20 R13: 0000000000054a0a R14: 00000000007622a8 R15: ffffffffffffffff Code: 4c 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 8d 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6c 24 08 49 8d 7d 09 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 3c 01 00 RIP: vb2_vmalloc_put_userptr+0x6e/0x210 drivers/media/v4l2-core/videobuf2-vmalloc.c:136 RSP: ffff88805cccfc18 kobject: 'loop5' (ffff8880a4b08aa0): kobject_uevent_env ---[ end trace 553b4ff4e3f8fd90 ]---