WARNING: CPU: 0 PID: 15830 at drivers/dma-buf/dma-buf.c:992 dma_buf_vunmap+0x1bb/0x220 drivers/dma-buf/dma-buf.c:992 kobject: 'loop0' (000000008a713ab2): kobject_uevent_env Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 15830 Comm: syz-executor3 Not tainted 4.20.0-rc3+ #128 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: 'loop0' (000000008a713ab2): fill_kobj_path: path = '/devices/virtual/block/loop0' __warn.cold.8+0x20/0x45 kernel/panic.c:540 kobject: 'loop5' (000000006fa74a86): kobject_uevent_env 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 kobject: 'loop5' (000000006fa74a86): fill_kobj_path: path = '/devices/virtual/block/loop5' 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 c6 25 1c fd 4c 89 f7 e8 6e 51 77 03 e8 b9 25 1c fd 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 a5 25 1c fd <0f> 0b eb e3 e8 9c 25 1c fd 0f 0b e8 95 25 1c fd 0f 0b e8 8e 25 1c RSP: 0018:ffff88817dc37948 EFLAGS: 00010293 RAX: ffff88817ef56280 RBX: 0000000000000000 RCX: ffffffff8558e3c0 RDX: 0000000000000000 RSI: ffffffff8463654b RDI: 0000000000000000 RBP: ffff88817dc37978 R08: ffff88817ef56280 R09: ffffed103aeb4aa6 R10: ffff88817dc37ad0 R11: ffff8881d75a5537 R12: ffffc9001333a000 R13: ffff88817c0a1240 R14: ffff88817c0a12a8 R15: ffff8881ba03f300 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 kobject: 'loop5' (000000006fa74a86): kobject_uevent_env 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 vim2m_release+0xe6/0x150 drivers/media/platform/vim2m.c:977 kobject: 'loop5' (000000006fa74a86): fill_kobj_path: path = '/devices/virtual/block/loop5' v4l2_release+0x224/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:456 __fput+0x385/0xa30 fs/file_table.c:278 kobject: 'loop4' (00000000bddbf1e2): kobject_uevent_env ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 kobject: 'loop4' (00000000bddbf1e2): fill_kobj_path: path = '/devices/virtual/block/loop4' tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 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: 0033:0x411021 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffd0df49930 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000411021 RDX: 0000000000000000 RSI: 0000000000730938 RDI: 0000000000000006 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffd0df49860 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 000000000000014b R15: 0000000000000003 Kernel Offset: disabled Rebooting in 86400 seconds..