Warning: Permanently added '10.128.0.24' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   34.183418] 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
[   34.188717] ------------[ cut here ]------------
[   34.208574] WARNING: CPU: 1 PID: 6345 at drivers/dma-buf/dma-buf.c:1039 dma_buf_vunmap+0x181/0x1f0
[   34.217652] Kernel panic - not syncing: panic_on_warn set ...
[   34.217652] 
[   34.225031] CPU: 1 PID: 6345 Comm: syz-executor448 Not tainted 4.14.184-syzkaller #0
[   34.232886] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   34.242215] Call Trace:
[   34.244782]  dump_stack+0x1b2/0x283
[   34.248388]  panic+0x1f9/0x42d
[   34.251557]  ? add_taint.cold+0x16/0x16
[   34.255517]  ? dma_buf_vunmap+0x181/0x1f0
[   34.259644]  ? dma_buf_vunmap+0x181/0x1f0
[   34.263768]  __warn.cold+0x2f/0x30
[   34.267310]  ? ist_end_non_atomic+0x10/0x10
[   34.271607]  ? dma_buf_vunmap+0x181/0x1f0
[   34.275729]  report_bug+0x20a/0x248
[   34.279334]  do_error_trap+0x195/0x2d0
[   34.283198]  ? math_error+0x2d0/0x2d0
[   34.286981]  ? lock_acquire+0x170/0x3f0
[   34.291017]  ? lock_downgrade+0x6e0/0x6e0
[   34.295142]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   34.299968]  invalid_op+0x1b/0x40
[   34.303395] RIP: 0010:dma_buf_vunmap+0x181/0x1f0
[   34.308136] RSP: 0018:ffff88809860fb38 EFLAGS: 00010297
[   34.313491] RAX: ffff888097e60200 RBX: 0000000000000000 RCX: 0000000000000000
[   34.320735] RDX: 0000000000000000 RSI: ffffc90001956000 RDI: 0000000000000000
[   34.327980] RBP: ffffc90001956000 R08: ffffffff8a381c00 R09: ffffffff89e768a0
[   34.335226] R10: ffff88809860fc40 R11: ffff888097e60200 R12: ffffc90001956000
[   34.342484] R13: ffff8880a9dabd28 R14: ffff888088e54d80 R15: 0000000000000000
[   34.349744]  ? dma_buf_vunmap+0x181/0x1f0
[   34.353868]  vb2_vmalloc_detach_dmabuf+0x57/0x80
[   34.358598]  ? vb2_vmalloc_map_dmabuf+0x90/0x90
[   34.363248]  __vb2_plane_dmabuf_put.isra.0+0x10b/0x2e0
[   34.368498]  __vb2_queue_free+0x5f5/0x7b0
[   34.372636]  ? __vb2_queue_cancel+0x3c2/0x8a0
[   34.377111]  vb2_core_queue_release+0x5b/0x70
[   34.381589]  _vb2_fop_release+0x1c1/0x280
[   34.385721]  vivid_fop_release+0x17d/0x3e0
[   34.389938]  ? fcntl_setlk+0xb30/0xb30
[   34.393891]  ? vivid_remove+0x3d0/0x3d0
[   34.400216]  ? dev_debug_store+0xe0/0xe0
[   34.404272]  v4l2_release+0xf4/0x190
[   34.407983]  __fput+0x25f/0x7a0
[   34.411356]  task_work_run+0x113/0x190
[   34.415245]  do_exit+0x9fb/0x2ae0
[   34.418683]  ? selinux_parse_skb.constprop.0+0x1661/0x16c0
[   34.424828]  ? rcu_read_lock_sched_held+0x10a/0x130
[   34.429828]  ? kmem_cache_free+0x23a/0x2b0
[   34.434053]  ? mm_update_next_owner+0x5b0/0x5b0
[   34.438728]  ? putname+0xcd/0x110
[   34.442159]  ? security_file_ioctl+0x76/0xb0
[   34.446550]  do_group_exit+0x100/0x2e0
[   34.450417]  SyS_exit_group+0x19/0x20
[   34.454203]  ? do_group_exit+0x2e0/0x2e0
[   34.458245]  do_syscall_64+0x1d5/0x640
[   34.462112]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   34.467277] RIP: 0033:0x442d98
[   34.470449] RSP: 002b:00007ffddcebbe48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   34.478131] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442d98
[   34.485513] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   34.492924] RBP: 00000000004c26a8 R08: 00000000000000e7 R09: ffffffffffffffd0
[   34.500186] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
[   34.507528] R13: 00000000006d4180 R14: 0000000000000000 R15: 0000000000000000
[   34.516823] Kernel Offset: disabled
[   34.520750] Rebooting in 86400 seconds..