WARNING: CPU: 1 PID: 21238 at drivers/dma-buf/dma-buf.c:992 dma_buf_vunmap+0x1bb/0x220 drivers/dma-buf/dma-buf.c:992
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 21238 Comm: syz-executor4 Not tainted 4.20.0-rc2+ #113
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x244/0x39d lib/dump_stack.c:113
 panic+0x2ad/0x55c kernel/panic.c:188
kobject: 'loop5' (00000000b29774d9): kobject_uevent_env
 __warn.cold.8+0x20/0x45 kernel/panic.c:540
kobject: 'loop5' (00000000b29774d9): fill_kobj_path: path = '/devices/virtual/block/loop5'
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:dma_buf_vunmap+0x1bb/0x220 drivers/dma-buf/dma-buf.c:992
Code: 00 00 00 00 e8 56 f2 27 fd 4c 89 f7 e8 7e 1f 77 03 e8 49 f2 27 fd 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 35 f2 27 fd <0f> 0b eb e3 e8 2c f2 27 fd 0f 0b e8 25 f2 27 fd 0f 0b e8 1e f2 27
RSP: 0018:ffff8881c0c675d8 EFLAGS: 00010212
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000de91000
RDX: 000000000001da2b RSI: ffffffff845795ab RDI: 0000000000000000
RBP: ffff8881c0c67608 R08: ffff88817c4780c0 R09: ffffed103020295e
R10: ffff8881c0c67760 R11: ffff888181014af7 R12: ffffc900135ee000
R13: ffff8881d1b2bb40 R14: ffff8881d1b2bba8 R15: ffff8881c7697f00
 vb2_vmalloc_detach_dmabuf+0x5a/0x80 drivers/media/common/videobuf2/videobuf2-vmalloc.c:406
 __vb2_plane_dmabuf_put.isra.5+0x122/0x310 drivers/media/common/videobuf2/videobuf2-core.c:275
 __vb2_buf_dmabuf_put drivers/media/common/videobuf2/videobuf2-core.c:291 [inline]
 __vb2_free_mem drivers/media/common/videobuf2/videobuf2-core.c:415 [inline]
 __vb2_queue_free+0x7f3/0xa30 drivers/media/common/videobuf2/videobuf2-core.c:458
 vb2_core_queue_release+0x62/0x80 drivers/media/common/videobuf2/videobuf2-core.c:2231
 vb2_queue_release+0x15/0x20 drivers/media/common/videobuf2/videobuf2-v4l2.c:837
 v4l2_m2m_ctx_release+0x1e/0x35 drivers/media/v4l2-core/v4l2-mem2mem.c:930
kobject: 'loop5' (00000000b29774d9): kobject_uevent_env
 vim2m_release+0xe6/0x150 drivers/media/platform/vim2m.c:977
 v4l2_release+0x224/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:456
kobject: 'loop5' (00000000b29774d9): fill_kobj_path: path = '/devices/virtual/block/loop5'
 __fput+0x385/0xa30 fs/file_table.c:278
 ____fput+0x15/0x20 fs/file_table.c:309
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 get_signal+0x1558/0x1980 kernel/signal.c:2347
 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe3bf487c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000457569
RDX: 00000000200002c0 RSI: 00000000c100565c RDI: 0000000000000004
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe3bf4886d4
R13: 00000000004c181b R14: 00000000004d27d8 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..