[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 34.413806] audit: type=1800 audit(1545405294.944:33): pid=6006 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 [ 34.436834] audit: type=1800 audit(1545405294.944:34): pid=6006 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: [ 36.116597] audit: type=1400 audit(1545405296.644:35): avc: denied { map } for pid=6180 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 '10.128.10.15' (ECDSA) to the list of known hosts. executing program [ 43.042340] audit: type=1400 audit(1545405303.574:36): avc: denied { map } for pid=6194 comm="syz-executor089" path="/root/syz-executor089589930" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 43.049372] kasan: CONFIG_KASAN_INLINE enabled [ 43.073747] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 43.081715] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.087957] CPU: 1 PID: 6194 Comm: syz-executor089 Not tainted 4.20.0-rc7+ #161 [ 43.095420] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.104772] RIP: 0010:tcp_splice_read+0x1fd/0xf90 [ 43.109601] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 52 0c 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 18 49 8d 7d 78 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e e5 0a 00 00 45 8b 6d 78 31 ff [ 43.128504] RSP: 0018:ffff8881ce667a58 EFLAGS: 00010206 [ 43.133856] RAX: dffffc0000000000 RBX: ffff8881ce667bb0 RCX: 1ffff11035bc9176 [ 43.141112] RDX: 000000000000000f RSI: 0000000000000000 RDI: 0000000000000078 [ 43.148385] RBP: ffff8881ce667bd8 R08: ffff8881ade48bb0 R09: 0000000000000006 [ 43.155640] R10: 0000000000000000 R11: ffff8881ade482c0 R12: ffff8881ce63cc00 [ 43.162898] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881ce667d58 [ 43.170155] FS: 0000000001fd5880(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 [ 43.178367] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.184311] CR2: 0000000020000140 CR3: 00000001d15ff000 CR4: 00000000001406e0 [ 43.191575] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.198834] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.206091] Call Trace: [ 43.208671] ? compat_tcp_getsockopt+0x80/0x80 [ 43.213245] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 43.217814] ? trace_hardirqs_on+0xbd/0x310 [ 43.222132] ? lock_release+0xa00/0xa00 [ 43.226093] ? lock_sock_nested+0xe2/0x120 [ 43.230320] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.235848] ? check_preemption_disabled+0x48/0x280 [ 43.240860] ? lock_sock_nested+0x9a/0x120 [ 43.245105] ? lock_sock_nested+0x9a/0x120 [ 43.249336] ? __local_bh_enable_ip+0x160/0x260 [ 43.253996] smc_splice_read+0x265/0x380 [ 43.258043] ? smc_unhash_sk+0x4b0/0x4b0 [ 43.262109] sock_splice_read+0xba/0x110 [ 43.266152] ? kernel_sock_shutdown+0x80/0x80 [ 43.270630] do_splice_to+0x12e/0x190 [ 43.274414] do_splice+0x1014/0x1430 [ 43.278112] ? opipe_prep.part.14+0x3b0/0x3b0 [ 43.282597] __x64_sys_splice+0x2c1/0x330 [ 43.286736] do_syscall_64+0x1b9/0x820 [ 43.290611] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 43.295965] ? syscall_return_slowpath+0x5e0/0x5e0 [ 43.300882] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.305731] ? trace_hardirqs_on_caller+0x310/0x310 [ 43.310734] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 43.315756] ? prepare_exit_to_usermode+0x291/0x3b0 [ 43.320762] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.325593] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.330770] RIP: 0033:0x4400e9 [ 43.333946] 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 43.352839] RSP: 002b:00007ffcdb8f1bd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000113 [ 43.360540] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9 [ 43.367799] RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000005 [ 43.375059] RBP: 00000000006ca018 R08: 0000000000010009 R09: 0000000000000002 [ 43.382341] R10: 0000000000000000 R11: 0000000000000216 R12: 0000000000401970 [ 43.389617] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000 [ 43.396892] Modules linked in: [ 43.400571] ---[ end trace ac2a2bcf0280e1df ]--- [ 43.405360] RIP: 0010:tcp_splice_read+0x1fd/0xf90 [ 43.410197] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 52 0c 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 18 49 8d 7d 78 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e e5 0a 00 00 45 8b 6d 78 31 ff [ 43.429394] RSP: 0018:ffff8881ce667a58 EFLAGS: 00010206 [ 43.434818] RAX: dffffc0000000000 RBX: ffff8881ce667bb0 RCX: 1ffff11035bc9176 [ 43.442114] RDX: 000000000000000f RSI: 0000000000000000 RDI: 0000000000000078 [ 43.449371] RBP: ffff8881ce667bd8 R08: ffff8881ade48bb0 R09: 0000000000000006 [ 43.456667] R10: 0000000000000000 R11: ffff8881ade482c0 R12: ffff8881ce63cc00 [ 43.463980] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881ce667d58 [ 43.471275] FS: 0000000001fd5880(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 [ 43.479521] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.485443] CR2: 0000000020000140 CR3: 00000001d15ff000 CR4: 00000000001406e0 [ 43.492755] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.500014] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.507323] Kernel panic - not syncing: Fatal exception [ 43.513665] Kernel Offset: disabled [ 43.517291] Rebooting in 86400 seconds..