[ 37.517162] audit: type=1800 audit(1556475499.082:33): pid=7123 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 37.544001] audit: type=1800 audit(1556475499.092:34): pid=7123 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 39.168994] random: sshd: uninitialized urandom read (32 bytes read) [ 39.390835] audit: type=1400 audit(1556475500.962:35): avc: denied { map } for pid=7296 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 39.444900] random: sshd: uninitialized urandom read (32 bytes read) [ 40.034804] random: sshd: uninitialized urandom read (32 bytes read) [ 593.601687] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.1.29' (ECDSA) to the list of known hosts. [ 599.395071] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 599.527419] audit: type=1400 audit(1556476061.092:36): avc: denied { map } for pid=7308 comm="syz-executor267" path="/root/syz-executor267939265" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 599.762895] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [ 599.771148] IP: kthread_stop+0x4c/0x650 [ 599.775102] PGD 74097067 P4D 74097067 PUD 953c2067 PMD 0 [ 599.780674] Oops: 0002 [#1] PREEMPT SMP KASAN [ 599.785253] Modules linked in: [ 599.788456] CPU: 0 PID: 7484 Comm: syz-executor267 Not tainted 4.14.114 #4 [ 599.795446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 599.804915] task: ffff888072404640 task.stack: ffff888099770000 [ 599.811086] RIP: 0010:kthread_stop+0x4c/0x650 [ 599.815558] RSP: 0018:ffff888099777a20 EFLAGS: 00010297 [ 599.820906] RAX: ffff888072404640 RBX: 0000000000000000 RCX: 0000000000000000 [ 599.828204] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000282 [ 599.835629] RBP: ffff888099777a40 R08: ffff888072404640 R09: 0000000000000000 [ 599.842883] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 599.850171] R13: ffff88809667f270 R14: ffff88809667f268 R15: ffffffff89bb9bc0 [ 599.857431] FS: 00000000022f5880(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 [ 599.865644] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 599.871503] CR2: 0000000000000020 CR3: 0000000075444000 CR4: 00000000001406f0 [ 599.878768] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 599.886022] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 599.893363] Call Trace: [ 599.896148] vivid_stop_generating_vid_cap+0x1b9/0x664 [ 599.901424] vid_cap_stop_streaming+0x7c/0xd0 [ 599.905940] ? vid_cap_buf_queue+0x230/0x230 [ 599.910398] __vb2_queue_cancel+0xa6/0x8a0 [ 599.914676] ? lock_downgrade+0x6e0/0x6e0 [ 599.918818] vb2_core_streamoff+0x52/0x110 [ 599.923031] __vb2_cleanup_fileio+0x78/0x150 [ 599.927426] vb2_core_queue_release+0x1d/0x80 [ 599.931913] _vb2_fop_release+0x1cf/0x2a0 [ 599.936044] vb2_fop_release+0x75/0xc0 [ 599.939915] vivid_fop_release+0x180/0x3f0 [ 599.944125] ? vivid_remove+0x3d0/0x3d0 [ 599.948138] ? dev_debug_store+0xe0/0xe0 [ 599.952179] v4l2_release+0xfb/0x190 [ 599.956031] __fput+0x277/0x7a0 [ 599.959300] ____fput+0x16/0x20 executing program [ 599.962581] task_work_run+0x119/0x190 [ 599.966635] do_exit+0x7df/0x2c10 [ 599.970074] ? mm_update_next_owner+0x5d0/0x5d0 [ 599.974728] ? up_read+0x1a/0x40 [ 599.978184] ? __do_page_fault+0x358/0xb80 [ 599.982426] do_group_exit+0x111/0x330 [ 599.986401] SyS_exit_group+0x1d/0x20 [ 599.990284] ? do_group_exit+0x330/0x330 [ 600.006299] do_syscall_64+0x1eb/0x630 [ 600.010216] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 600.015128] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 600.020346] RIP: 0033:0x443b78 [ 600.023513] RSP: 002b:00007ffee6fbf008 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 600.031195] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000443b78 [ 600.038569] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 600.045822] RBP: 00000000004c34f0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 600.053183] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000000001 [ 600.060440] R13: 00000000006d5180 R14: 0000000000000000 R15: 0000000000000000 [ 600.067846] Code: 00 65 8b 1d 67 2f c3 7e 83 fb 3f 0f 87 63 04 00 00 e8 d9 96 1e 00 89 db 48 0f a3 1d bf 98 e6 06 0f 82 4c 03 00 00 e8 c4 96 1e 00 41 ff 44 24 20 49 8d 7c 24 24 48 b8 00 00 00 00 00 fc ff df [ 600.086954] RIP: kthread_stop+0x4c/0x650 RSP: ffff888099777a20 [ 600.092983] CR2: 0000000000000020 [ 600.096547] ---[ end trace 016a95db80f4c598 ]--- [ 600.101618] Kernel panic - not syncing: Fatal exception [ 600.108245] Kernel Offset: disabled [ 600.111865] Rebooting in 86400 seconds..