WARNING: CPU: 1 PID: 24952 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: 24952 Comm: syz-executor3 Not tainted 4.20.0-rc7+ #160 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 __warn.cold.8+0x20/0x45 kernel/panic.c:540 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:973 RIP: 0010:dma_buf_vunmap+0x1bb/0x220 drivers/dma-buf/dma-buf.c:992 Code: 00 00 00 00 e8 b6 57 1c fd 4c 89 f7 e8 1e 56 77 03 e8 a9 57 1c fd 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 95 57 1c fd <0f> 0b eb e3 e8 8c 57 1c fd 0f 0b e8 85 57 1c fd 0f 0b e8 7e 57 1c RSP: 0018:ffff8881b76f7348 EFLAGS: 00010216 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000c636000 RDX: 000000000000026d RSI: ffffffff84632cdb RDI: 0000000000000000 RBP: ffff8881b76f7378 R08: ffff8881ca798640 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8881ca798640 R12: ffffc900125a6000 R13: ffff8881bba4d680 R14: ffff8881bba4d6f0 R15: ffff8881d23e7e00 vb2_vmalloc_detach_dmabuf+0x5a/0x80 drivers/media/common/videobuf2/videobuf2-vmalloc.c:406 __vb2_plane_dmabuf_put.isra.6+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_reqbufs+0x2da/0x1040 drivers/media/common/videobuf2/videobuf2-core.c:694 vb2_reqbufs+0x1bf/0x200 drivers/media/common/videobuf2/videobuf2-v4l2.c:648 v4l2_m2m_reqbufs+0x90/0x1d0 drivers/media/v4l2-core/v4l2-mem2mem.c:438 v4l2_m2m_ioctl_reqbufs+0x6b/0x80 drivers/media/v4l2-core/v4l2-mem2mem.c:1009 v4l_reqbufs+0xae/0xd0 drivers/media/v4l2-core/v4l2-ioctl.c:1884 __video_do_ioctl+0x8b1/0x1050 drivers/media/v4l2-core/v4l2-ioctl.c:2853 video_usercopy+0x5c1/0x1760 drivers/media/v4l2-core/v4l2-ioctl.c:3035 video_ioctl2+0x2c/0x33 drivers/media/v4l2-core/v4l2-ioctl.c:3079 v4l2_ioctl+0x154/0x1b0 drivers/media/v4l2-core/v4l2-dev.c:364 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696 kobject: 'loop0' (00000000d6d6dc97): kobject_uevent_env ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 kobject: 'loop0' (00000000d6d6dc97): fill_kobj_path: path = '/devices/virtual/block/loop0' entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457669 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:00007f75541c8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457669 RDX: 00000000200001c0 RSI: 00000000c0145608 RDI: 0000000000000003 RBP: 000000000072c180 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f75541c96d4 R13: 00000000004c1f12 R14: 00000000004d3b70 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..