[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[    9.441100] rsyslogd (2870) used greatest stack depth: 14496 bytes left
[?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-next-kasan-gce-6,10.128.0.38' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   57.830809] kasan: CONFIG_KASAN_INLINE enabled
[   57.831596] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   57.832727] general protection fault: 0000 [#1] SMP KASAN
[   57.833493] Dumping ftrace buffer:
[   57.833968]    (ftrace buffer empty)
[   57.834497] Modules linked in:
[   57.834933] CPU: 1 PID: 2998 Comm: syzkaller661723 Not tainted 4.14.0-rc7-next-20171103+ #38
[   57.836118] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   57.837337] task: ffff8801ce16e380 task.stack: ffff8801ce720000
[   57.838142] RIP: 0010:asn1_ber_decoder+0x41e/0x1af0
[   57.838838] RSP: 0018:ffff8801ce7278d0 EFLAGS: 00010246
[   57.839548] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   57.840500] RDX: 0000000000000000 RSI: ffff8801cde7e900 RDI: ffffffff853f1920
[   57.841505] RBP: ffff8801ce727b88 R08: 0000000000000060 R09: 0000000000000000
[   57.842457] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   57.843409] R13: 0000000000000000 R14: ffff8801ce727b60 R15: dffffc0000000000
[   57.844420] FS:  0000000001625880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
[   57.845534] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   57.846349] CR2: 0000000020f49ffb CR3: 00000001ce376000 CR4: 00000000001406e0
[   57.847316] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   57.848269] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   57.849222] Call Trace:
[   57.849579]  ? pkcs7_parse_message+0x18a/0x730
[   57.850192]  ? verify_pkcs7_signature+0x8d/0x290
[   57.850824]  ? pkcs7_preparse+0x7b/0xc0
[   57.853895]  ? depot_save_stack+0x490/0x490
[   57.858191]  ? __lock_is_held+0xbc/0x140
[   57.862229]  ? __lock_is_held+0xbc/0x140
[   57.866262]  ? pkcs7_parse_message+0x18a/0x730
[   57.870812]  ? rcu_read_lock_sched_held+0x108/0x120
[   57.875796]  ? kmem_cache_alloc_trace+0x459/0x750
[   57.880610]  ? lock_release+0xd70/0xd70
[   57.884556]  pkcs7_parse_message+0x2b3/0x730
[   57.888932]  ? key_task_permission+0x330/0x330
[   57.893481]  ? pkcs7_supply_detached_data+0x90/0x90
[   57.898464]  verify_pkcs7_signature+0x8d/0x290
[   57.903014]  ? restrict_link_by_builtin_and_secondary_trusted+0x80/0x80
[   57.909734]  ? __down_interruptible+0x6b0/0x6b0
[   57.914368]  ? trace_hardirqs_on+0xd/0x10
[   57.918483]  ? current_kernel_time64+0x1d4/0x2f0
[   57.923208]  ? pkcs7_supply_detached_data+0x90/0x90
[   57.928189]  pkcs7_preparse+0x7b/0xc0
[   57.931953]  ? pkcs7_preparse+0xc0/0xc0
[   57.935894]  key_create_or_update+0x533/0x1040
[   57.940445]  ? key_type_lookup+0xd0/0xd0
[   57.944471]  ? join_session_keyring+0x300/0x300
[   57.949105]  ? mem_cgroup_commit_charge+0x111/0x750
[   57.954111]  ? memdup_user+0x5e/0x90
[   57.957796]  SyS_add_key+0x18a/0x340
[   57.961477]  ? key_get_type_from_user.constprop.10+0xd0/0xd0
[   57.967240]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   57.972229]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   57.976949] RIP: 0033:0x43fd89
[   57.980105] RSP: 002b:00007ffc4eb5ea68 EFLAGS: 00000286 ORIG_RAX: 00000000000000f8
[   57.987777] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd89
[   57.995010] RDX: 0000000020000000 RSI: 0000000020f49ffb RDI: 0000000020f4a000
[   58.002254] RBP: 0000000000000086 R08: ffffffffffffffff R09: 0000000000000000
[   58.009491] R10: 0000000000000000 R11: 0000000000000286 R12: 00000000004016f0
[   58.016731] R13: 0000000000401780 R14: 0000000000000000 R15: 0000000000000000
[   58.023977] Code: 19 ff 48 8d 43 01 49 89 86 80 fe ff ff 48 89 85 a8 fd ff ff 48 8b 85 c0 fd ff ff 48 01 d8 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 <42> 0f b6 14 3a 38 ca 7f 08 84 d2 0f 85 cd 0f 00 00 0f b6 00 88 
[   58.043046] RIP: asn1_ber_decoder+0x41e/0x1af0 RSP: ffff8801ce7278d0
[   58.049557] ---[ end trace 5ee5c6854dbb12d7 ]---
[   58.054467] Kernel panic - not syncing: Fatal exception
[   58.059827] Dumping ftrace buffer:
[   58.063334]    (ftrace buffer empty)
[   58.067019] Kernel Offset: disabled
[   58.070616] Rebooting in 86400 seconds..