audit: type=1400 audit(1593775103.731:8): avc:  denied  { execmem } for  pid=6345 comm="syz-executor448" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6345 at drivers/dma-buf/dma-buf.c:1039 dma_buf_vunmap+0x181/0x1f0 drivers/dma-buf/dma-buf.c:1039
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 6345 Comm: syz-executor448 Not tainted 4.14.184-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+0x1b2/0x283 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x2f/0x30 kernel/panic.c:547
 report_bug+0x20a/0x248 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:dma_buf_vunmap+0x181/0x1f0 drivers/dma-buf/dma-buf.c:1039
RSP: 0018:ffff88809860fb38 EFLAGS: 00010297
RAX: ffff888097e60200 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffc90001956000 RDI: 0000000000000000
RBP: ffffc90001956000 R08: ffffffff8a381c00 R09: ffffffff89e768a0
R10: ffff88809860fc40 R11: ffff888097e60200 R12: ffffc90001956000
R13: ffff8880a9dabd28 R14: ffff888088e54d80 R15: 0000000000000000
 vb2_vmalloc_detach_dmabuf+0x57/0x80 drivers/media/v4l2-core/videobuf2-vmalloc.c:407
 __vb2_plane_dmabuf_put.isra.0+0x10b/0x2e0 drivers/media/v4l2-core/videobuf2-core.c:273
 __vb2_buf_dmabuf_put drivers/media/v4l2-core/videobuf2-core.c:289 [inline]
 __vb2_free_mem drivers/media/v4l2-core/videobuf2-core.c:411 [inline]
 __vb2_queue_free+0x5f5/0x7b0 drivers/media/v4l2-core/videobuf2-core.c:454
 vb2_core_queue_release+0x5b/0x70 drivers/media/v4l2-core/videobuf2-core.c:2043
 vb2_queue_release drivers/media/v4l2-core/videobuf2-v4l2.c:669 [inline]
 _vb2_fop_release+0x1c1/0x280 drivers/media/v4l2-core/videobuf2-v4l2.c:840
 vivid_fop_release+0x17d/0x3e0 drivers/media/platform/vivid/vivid-core.c:486
 v4l2_release+0xf4/0x190 drivers/media/v4l2-core/v4l2-dev.c:446
 __fput+0x25f/0x7a0 fs/file_table.c:210
 task_work_run+0x113/0x190 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x9fb/0x2ae0 kernel/exit.c:858
 do_group_exit+0x100/0x2e0 kernel/exit.c:955
 SYSC_exit_group kernel/exit.c:966 [inline]
 SyS_exit_group+0x19/0x20 kernel/exit.c:964
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x442d98
RSP: 002b:00007ffddcebbe48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442d98
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004c26a8 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d4180 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..