------------[ cut here ]------------ WARNING: CPU: 1 PID: 26277 at drivers/dma-buf/dma-buf.c:1039 dma_buf_vunmap+0x18f/0x200 drivers/dma-buf/dma-buf.c:1039 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 26277 Comm: syz-executor.5 Not tainted 4.14.112 #2 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+0x138/0x19c lib/dump_stack.c:53 panic+0x1f2/0x438 kernel/panic.c:182 __warn.cold+0x2f/0x34 kernel/panic.c:546 report_bug+0x216/0x254 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+0x1bb/0x310 arch/x86/kernel/traps.c:295 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:944 RIP: 0010:dma_buf_vunmap+0x18f/0x200 drivers/dma-buf/dma-buf.c:1039 RSP: 0018:ffff88803a667bb8 EFLAGS: 00010297 RAX: ffff88805f928680 RBX: 0000000000000000 RCX: 1ffff11013dd6ca7 RDX: 0000000000000000 RSI: ffffc9000968d000 RDI: 0000000000000000 RBP: ffff88803a667be0 R08: dffffc0000000000 R09: ffffffff88cb0738 R10: ffff88803a667cd0 R11: ffff88805f928680 R12: ffffc9000968d000 R13: ffffc9000968d000 R14: ffff8880a57e6568 R15: ffff888090c6ba00 vb2_vmalloc_detach_dmabuf+0x5e/0x90 drivers/media/v4l2-core/videobuf2-vmalloc.c:407 __vb2_plane_dmabuf_put.isra.0+0x10f/0x300 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+0x610/0x7e0 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+0xfb/0x190 drivers/media/v4l2-core/v4l2-dev.c:446 __fput+0x277/0x7a0 fs/file_table.c:210 ____fput+0x16/0x20 fs/file_table.c:244 task_work_run+0x119/0x190 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:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:267 [inline] do_syscall_64+0x4a9/0x630 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4129e1 RSP: 002b:00007ffe7e1c8160 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004129e1 RDX: 0000001b2c020000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000740518 R08: 0000000015c23545 R09: 0000000015c23549 R10: 00007ffe7e1c8230 R11: 0000000000000293 R12: 0000000000000001 R13: 000000000009a5b8 R14: 000000000009a5e5 R15: 000000000073bf0c Kernel Offset: disabled Rebooting in 86400 seconds..