INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added 'ci-upstream-kasan-gce-9,10.128.0.25' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   19.499657] kasan: CONFIG_KASAN_INLINE enabled
[   19.500358] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   19.501341] general protection fault: 0000 [#1] SMP KASAN
[   19.502074] Dumping ftrace buffer:
[   19.502546]    (ftrace buffer empty)
[   19.503042] Modules linked in:
[   19.503479] CPU: 0 PID: 3075 Comm: syzkaller531375 Not tainted 4.15.0-rc1+ #205
[   19.504451] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   19.505672] task: 00000000523f1e90 task.stack: 00000000c2d38485
[   19.506472] RIP: 0010:string+0xb4/0x200
[   19.506999] RSP: 0018:ffff8801cc637868 EFLAGS: 00010006
[   19.507714] RAX: dffffc0000000000 RBX: fffffffffffffffe RCX: ffffffff85135fbf
[   19.508668] RDX: 06c7240eabebe406 RSI: 1ffff100398c6f01 RDI: ffff8801cc637888
[   19.509619] RBP: ffff8801cc6378b8 R08: ffffed00398a5566 R09: ffffed00398a5566
[   19.510569] R10: 0000000000000002 R11: ffffed00398a5565 R12: 363920755f5f2034
[   19.511519] R13: 363920755f5f2033 R14: ffffffffffffffff R15: ffff8801cc52ab2a
[   19.512473] FS:  0000000001a75880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
[   19.513560] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   19.514333] CR2: 00000000205e2ff0 CR3: 00000001cc470000 CR4: 00000000001406f0
[   19.515308] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   19.516261] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   19.517213] Call Trace:
[   19.517567]  ? format_decode+0x10a/0x830
[   19.518112]  vsnprintf+0x863/0x1900
[   19.518602]  ? pointer+0x9e0/0x9e0
[   19.519083]  ? lock_release+0xda0/0xda0
[   19.519618]  seq_vprintf+0xe3/0x1a0
[   19.522318]  seq_printf+0xb3/0xe0
[   19.525735]  ? seq_vprintf+0x1a0/0x1a0
[   19.529586]  ? __lock_task_sighand+0x22f/0x6e0
[   19.534132]  ? zap_other_threads+0x240/0x240
[   19.538504]  ? kasan_kmalloc+0xad/0xe0
[   19.542360]  show_timer+0x1ee/0x2b0
[   19.545952]  ? timers_start+0x14c/0x1c0
[   19.549895]  seq_read+0x385/0x13d0
[   19.553408]  ? seq_lseek+0x3c0/0x3c0
[   19.557089]  ? selinux_file_permission+0x82/0x460
[   19.561902]  ? security_file_permission+0x89/0x1f0
[   19.566800]  ? rw_verify_area+0xe5/0x2b0
[   19.570827]  do_iter_read+0x3db/0x5b0
[   19.574591]  ? dup_iter+0x260/0x260
[   19.578186]  vfs_readv+0x121/0x1c0
[   19.581690]  ? may_open_dev+0xe0/0xe0
[   19.585455]  ? compat_rw_copy_check_uvector+0x2e0/0x2e0
[   19.590782]  ? mm_fault_error+0x2c0/0x2c0
[   19.594899]  ? fget_raw+0x20/0x20
[   19.598316]  ? do_page_fault+0xee/0x720
[   19.602255]  ? putname+0xf3/0x130
[   19.605674]  ? do_sys_open+0x320/0x6d0
[   19.609527]  do_preadv+0x11b/0x1a0
[   19.613032]  ? do_preadv+0x11b/0x1a0
[   19.616712]  SyS_preadv+0x30/0x40
[   19.620134]  entry_SYSCALL_64_fastpath+0x1f/0x96
[   19.624853] RIP: 0033:0x440149
[   19.628008] RSP: 002b:00007fff96d72b08 EFLAGS: 00000213 ORIG_RAX: 0000000000000127
[   19.635684] RAX: ffffffffffffffda RBX: 00007fff96d72b10 RCX: 0000000000440149
[   19.642919] RDX: 0000000000000001 RSI: 00000000205e2ff0 RDI: 0000000000000003
[   19.650152] RBP: 0000000000000000 R08: 0000000000000011 R09: 65732f636f72702f
[   19.657385] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401a10
[   19.664617] R13: 0000000000401aa0 R14: 0000000000000000 R15: 0000000000000000
[   19.671858] Code: 01 00 00 e8 7f 98 5c fc 4d 85 f6 0f 84 10 01 00 00 e8 71 98 5c fc 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 4d 8d 65 01 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 ec 00 00 
[   19.690923] RIP: string+0xb4/0x200 RSP: ffff8801cc637868
[   19.696339] ---[ end trace 3570c98033660e3f ]---
[   19.701059] Kernel panic - not syncing: Fatal exception
[   19.706781] Dumping ftrace buffer:
[   19.710294]    (ftrace buffer empty)
[   19.713971] Kernel Offset: disabled
[   19.717560] Rebooting in 86400 seconds..