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..