[ 28.452607] audit: type=1800 audit(1545326283.219:27): pid=5893 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 28.472450] audit: type=1800 audit(1545326283.229:28): pid=5893 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 29.105145] audit: type=1800 audit(1545326283.949:29): pid=5893 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 29.124680] audit: type=1800 audit(1545326283.949:30): pid=5893 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.106' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.899993] kasan: CONFIG_KASAN_INLINE enabled [ 39.904891] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.912376] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.918690] CPU: 1 PID: 6047 Comm: syz-executor827 Not tainted 4.20.0-rc6+ #241 [ 39.926127] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.935607] RIP: 0010:tcp_splice_read+0x1fd/0xf90 [ 39.940570] 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 [ 39.959777] RSP: 0018:ffff8881c21ffa58 EFLAGS: 00010206 [ 39.965131] RAX: dffffc0000000000 RBX: ffff8881c21ffbb0 RCX: 1ffff11038384556 [ 39.972389] RDX: 000000000000000f RSI: 0000000000000000 RDI: 0000000000000078 [ 39.979716] RBP: ffff8881c21ffbd8 R08: ffff8881c1c22ab0 R09: 0000000000000006 [ 39.987081] R10: 0000000000000000 R11: ffff8881c1c221c0 R12: ffff8881c4ac8040 [ 39.994339] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881c21ffd58 [ 40.001723] FS: 0000000001d8b880(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 [ 40.010000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.015873] CR2: 0000000020000140 CR3: 00000001c21e4000 CR4: 00000000001406e0 [ 40.023438] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.030695] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.038036] Call Trace: [ 40.040655] ? compat_tcp_getsockopt+0x80/0x80 [ 40.045282] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 40.049929] ? trace_hardirqs_on+0xbd/0x310 [ 40.054241] ? lock_release+0xa00/0xa00 [ 40.058220] ? lock_sock_nested+0xe2/0x120 [ 40.062452] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.068113] ? check_preemption_disabled+0x48/0x280 [ 40.073122] ? lock_sock_nested+0x9a/0x120 [ 40.077360] ? lock_sock_nested+0x9a/0x120 [ 40.081593] ? __local_bh_enable_ip+0x160/0x260 [ 40.086259] smc_splice_read+0x265/0x380 [ 40.090304] ? smc_unhash_sk+0x4b0/0x4b0 [ 40.094369] sock_splice_read+0xba/0x110 [ 40.098412] ? kernel_sock_shutdown+0x80/0x80 [ 40.102890] do_splice_to+0x12e/0x190 [ 40.106680] do_splice+0x1014/0x1430 [ 40.110385] ? opipe_prep.part.14+0x3b0/0x3b0 [ 40.114868] __x64_sys_splice+0x2c1/0x330 [ 40.119117] do_syscall_64+0x1b9/0x820 [ 40.122995] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 40.128348] ? syscall_return_slowpath+0x5e0/0x5e0 [ 40.133360] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.138193] ? trace_hardirqs_on_caller+0x310/0x310 [ 40.143235] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 40.148276] ? prepare_exit_to_usermode+0x291/0x3b0 [ 40.153283] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.158115] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.163333] RIP: 0033:0x4400e9 [ 40.166518] 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 [ 40.185678] RSP: 002b:00007ffdb49d91b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000113 [ 40.193386] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9 [ 40.200642] RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000005 [ 40.207904] RBP: 00000000006ca018 R08: 0000000000010009 R09: 0000000000000002 [ 40.215329] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000401970 [ 40.222658] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000 [ 40.229996] Modules linked in: [ 40.233857] ---[ end trace 1c86db377b298fae ]--- [ 40.238657] RIP: 0010:tcp_splice_read+0x1fd/0xf90 [ 40.243577] 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 [ 40.262866] RSP: 0018:ffff8881c21ffa58 EFLAGS: 00010206 [ 40.268305] RAX: dffffc0000000000 RBX: ffff8881c21ffbb0 RCX: 1ffff11038384556 [ 40.275606] RDX: 000000000000000f RSI: 0000000000000000 RDI: 0000000000000078 [ 40.282967] RBP: ffff8881c21ffbd8 R08: ffff8881c1c22ab0 R09: 0000000000000006 [ 40.290272] R10: 0000000000000000 R11: ffff8881c1c221c0 R12: ffff8881c4ac8040 [ 40.297564] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881c21ffd58 [ 40.304859] FS: 0000000001d8b880(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 [ 40.313141] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.319093] CR2: 0000000020000140 CR3: 00000001c21e4000 CR4: 00000000001406e0 [ 40.326430] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.333805] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.341068] Kernel panic - not syncing: Fatal exception [ 40.347552] Kernel Offset: disabled [ 40.351175] Rebooting in 86400 seconds..