[ 29.777351] audit: type=1800 audit(1545337953.696:27): pid=5980 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 29.796434] audit: type=1800 audit(1545337953.706:28): pid=5980 uid=0 auid=4294967295 ses=4294967295 subj=_ 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. [ 30.511598] audit: type=1800 audit(1545337954.526:29): pid=5980 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 30.531731] audit: type=1800 audit(1545337954.526:30): pid=5980 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.109' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.736360] kasan: CONFIG_KASAN_INLINE enabled [ 42.741607] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.749381] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.755636] CPU: 0 PID: 6135 Comm: syz-executor876 Not tainted 4.20.0-rc7+ #159 [ 42.763078] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.772422] RIP: 0010:tcp_splice_read+0x1fd/0xf90 [ 42.777247] 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 [ 42.796130] RSP: 0018:ffff8881b9c07a58 EFLAGS: 00010206 [ 42.801476] RAX: dffffc0000000000 RBX: ffff8881b9c07bb0 RCX: 1ffff1103861f566 [ 42.808727] RDX: 000000000000000f RSI: 0000000000000000 RDI: 0000000000000078 [ 42.815975] RBP: ffff8881b9c07bd8 R08: ffff8881c30fab30 R09: 0000000000000006 [ 42.823238] R10: 0000000000000000 R11: ffff8881c30fa240 R12: ffff8881bb678bc0 [ 42.830500] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881b9c07d58 [ 42.837762] FS: 00000000022ba880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 [ 42.845966] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.851829] CR2: 0000000020000140 CR3: 00000001bed0c000 CR4: 00000000001406f0 [ 42.859094] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.866344] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.873597] Call Trace: [ 42.876172] ? compat_tcp_getsockopt+0x80/0x80 [ 42.880739] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 42.885303] ? trace_hardirqs_on+0xbd/0x310 [ 42.889608] ? lock_release+0xa00/0xa00 [ 42.893569] ? lock_sock_nested+0xe2/0x120 [ 42.897805] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.903327] ? check_preemption_disabled+0x48/0x280 [ 42.908323] ? lock_sock_nested+0x9a/0x120 [ 42.912539] ? lock_sock_nested+0x9a/0x120 [ 42.916778] ? __local_bh_enable_ip+0x160/0x260 [ 42.921434] smc_splice_read+0x265/0x380 [ 42.925481] ? smc_unhash_sk+0x4b0/0x4b0 [ 42.929527] sock_splice_read+0xba/0x110 [ 42.933568] ? kernel_sock_shutdown+0x80/0x80 [ 42.938047] do_splice_to+0x12e/0x190 [ 42.941828] do_splice+0x1014/0x1430 [ 42.945528] ? opipe_prep.part.14+0x3b0/0x3b0 [ 42.950008] __x64_sys_splice+0x2c1/0x330 [ 42.954143] do_syscall_64+0x1b9/0x820 [ 42.958016] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 42.963363] ? syscall_return_slowpath+0x5e0/0x5e0 [ 42.968305] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.973132] ? trace_hardirqs_on_caller+0x310/0x310 [ 42.978135] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 42.983136] ? prepare_exit_to_usermode+0x291/0x3b0 [ 42.988139] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.992967] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.998154] RIP: 0033:0x4400e9 [ 43.001338] 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 [ 43.020237] RSP: 002b:00007ffc0d2b6068 EFLAGS: 00000216 ORIG_RAX: 0000000000000113 [ 43.027930] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9 [ 43.035182] RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000005 [ 43.042432] RBP: 00000000006ca018 R08: 0000000000010009 R09: 0000000000000002 [ 43.049695] R10: 0000000000000000 R11: 0000000000000216 R12: 0000000000401970 [ 43.056950] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000 [ 43.064204] Modules linked in: [ 43.068226] ---[ end trace 4e714375c79e8ef3 ]--- [ 43.072998] RIP: 0010:tcp_splice_read+0x1fd/0xf90 [ 43.077896] 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 [ 43.097131] RSP: 0018:ffff8881b9c07a58 EFLAGS: 00010206 [ 43.102486] RAX: dffffc0000000000 RBX: ffff8881b9c07bb0 RCX: 1ffff1103861f566 [ 43.109777] RDX: 000000000000000f RSI: 0000000000000000 RDI: 0000000000000078 [ 43.117097] RBP: ffff8881b9c07bd8 R08: ffff8881c30fab30 R09: 0000000000000006 [ 43.124352] R10: 0000000000000000 R11: ffff8881c30fa240 R12: ffff8881bb678bc0 [ 43.131653] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881b9c07d58 [ 43.138969] FS: 00000000022ba880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 [ 43.147217] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.153096] CR2: 0000000020000140 CR3: 00000001bed0c000 CR4: 00000000001406f0 [ 43.160393] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.167682] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.174951] Kernel panic - not syncing: Fatal exception [ 43.181262] Kernel Offset: disabled [ 43.184885] Rebooting in 86400 seconds..