Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 32.776855] audit: type=1800 audit(1541380151.898:33): pid=5734 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=2432 res=0 [ 32.806500] audit: type=1800 audit(1541380151.898:34): pid=5734 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=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 60.521991] audit: type=1400 audit(1541380179.638:35): avc: denied { map } for pid=5912 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 Warning: Permanently added '10.128.0.66' (ECDSA) to the list of known hosts. executing program [ 67.127587] audit: type=1400 audit(1541380186.248:36): avc: denied { map } for pid=5924 comm="syz-executor693" path="/root/syz-executor693413439" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 67.131619] BUG: pagefault on kernel address 0xffffc9000257f000 in non-whitelisted uaccess [ 67.162337] BUG: unable to handle kernel paging request at ffffc9000257f000 [ 67.169431] PGD 1da95a067 P4D 1da95a067 PUD 1da95b067 PMD 1ce1e5067 PTE 0 [ 67.176352] Oops: 0000 [#1] PREEMPT SMP KASAN [ 67.180829] CPU: 1 PID: 5924 Comm: syz-executor693 Not tainted 4.19.0+ #99 [ 67.187822] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.197168] RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 [ 67.203041] Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 [ 67.221925] RSP: 0018:ffff8801d7137680 EFLAGS: 00010202 [ 67.227269] RAX: 0000000000000000 RBX: 000000000000ca80 RCX: 0000000000004a80 [ 67.234520] RDX: 000000000000ca80 RSI: ffffc9000257f000 RDI: 00000000200080c0 [ 67.241780] RBP: ffff8801d71376b8 R08: 0000000000000000 R09: 000000000000032a [ 67.249060] R10: fffff520004b074f R11: ffffc90002583a7f R12: 000000002000cb40 [ 67.256341] R13: 00000000200000c0 R14: ffffc90002577000 R15: 00007ffffffff000 [ 67.263601] FS: 0000000000a70880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 67.271811] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.277675] CR2: ffffc9000257f000 CR3: 00000001af953000 CR4: 00000000001406e0 [ 67.284926] Call Trace: [ 67.287500] ? _copy_to_user+0xf6/0x110 [ 67.291461] vidioc_g_fmt_vid_overlay+0x392/0x550 [ 67.296291] v4l_g_fmt+0x2ad/0x640 [ 67.299816] __video_do_ioctl+0x8b1/0x1050 [ 67.304042] ? v4l_s_fmt+0x990/0x990 [ 67.307744] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 67.313265] video_usercopy+0x5c1/0x1760 [ 67.317310] ? v4l_s_fmt+0x990/0x990 [ 67.321015] ? v4l_enumstd+0x70/0x70 [ 67.324717] ? rcu_softirq_qs+0x20/0x20 [ 67.328683] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.334206] ? avc_has_extended_perms+0xab2/0x15a0 [ 67.339126] ? avc_ss_reset+0x190/0x190 [ 67.343092] ? save_stack+0xa9/0xd0 [ 67.346703] ? save_stack+0x43/0xd0 [ 67.350337] ? __kasan_slab_free+0x102/0x150 [ 67.354732] ? kasan_slab_free+0xe/0x10 [ 67.358707] ? kmem_cache_free+0x83/0x290 [ 67.362864] ? putname+0xf2/0x130 [ 67.366302] ? __x64_sys_open+0x7e/0xc0 [ 67.370260] ? do_syscall_64+0x1b9/0x820 [ 67.374314] ? kasan_check_read+0x11/0x20 [ 67.378448] ? perf_trace_sched_process_exec+0x860/0x860 [ 67.383881] ? video_usercopy+0x1760/0x1760 [ 67.388188] video_ioctl2+0x2c/0x33 [ 67.391797] v4l2_ioctl+0x154/0x1b0 [ 67.395405] ? video_devdata+0xa0/0xa0 [ 67.399276] do_vfs_ioctl+0x1de/0x1790 [ 67.403171] ? ioctl_preallocate+0x300/0x300 [ 67.407569] ? selinux_file_mprotect+0x620/0x620 [ 67.412314] ? rcu_read_lock_sched_held+0x14f/0x180 [ 67.417318] ? kmem_cache_free+0x1db/0x290 [ 67.421545] ? putname+0xf7/0x130 [ 67.424987] ? do_syscall_64+0x9a/0x820 [ 67.428951] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.434472] ? security_file_ioctl+0x94/0xc0 [ 67.438871] ksys_ioctl+0xa9/0xd0 [ 67.442328] __x64_sys_ioctl+0x73/0xb0 [ 67.446211] do_syscall_64+0x1b9/0x820 [ 67.450105] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 67.455456] ? syscall_return_slowpath+0x5e0/0x5e0 [ 67.460372] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 67.465217] ? trace_hardirqs_on_caller+0x310/0x310 [ 67.470235] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 67.475253] ? prepare_exit_to_usermode+0x291/0x3b0 [ 67.480281] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 67.485125] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.490299] RIP: 0033:0x443f49 [ 67.493480] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.512364] RSP: 002b:00007fff33032418 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 67.520068] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443f49 [ 67.527318] RDX: 00000000200000c0 RSI: 00000000c0d05604 RDI: 0000000000000004 [ 67.534593] RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0 [ 67.541843] R10: 0000f80000000000 R11: 0000000000000217 R12: 0000000000401c50 [ 67.549094] R13: 0000000000401ce0 R14: 0000000000000000 R15: 0000000000000000 [ 67.556348] Modules linked in: [ 67.559523] CR2: ffffc9000257f000 [ 67.562960] ---[ end trace f1c2cf056696973c ]--- [ 67.567705] RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 [ 67.573586] Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 [ 67.592469] RSP: 0018:ffff8801d7137680 EFLAGS: 00010202 [ 67.597829] RAX: 0000000000000000 RBX: 000000000000ca80 RCX: 0000000000004a80 [ 67.605077] RDX: 000000000000ca80 RSI: ffffc9000257f000 RDI: 00000000200080c0 [ 67.612372] RBP: ffff8801d71376b8 R08: 0000000000000000 R09: 000000000000032a [ 67.619658] R10: fffff520004b074f R11: ffffc90002583a7f R12: 000000002000cb40 [ 67.626908] R13: 00000000200000c0 R14: ffffc90002577000 R15: 00007ffffffff000 [ 67.634160] FS: 0000000000a70880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 67.642367] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.648403] CR2: ffffc9000257f000 CR3: 00000001af953000 CR4: 00000000001406e0 [ 67.655677] Kernel panic - not syncing: Fatal exception [ 67.661969] Kernel Offset: disabled [ 67.665596] Rebooting in 86400 seconds..