[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.
[    9.725376] sshd (2904) used greatest stack depth: 14592 bytes left
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added 'ci-upstream-mmots-kasan-gce-3,10.128.0.51' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   43.246619] kasan: CONFIG_KASAN_INLINE enabled
[   43.247353] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   43.248421] general protection fault: 0000 [#1] SMP KASAN
[   43.249152] Dumping ftrace buffer:
[   43.249636]    (ftrace buffer empty)
[   43.250142] Modules linked in:
[   43.250576] CPU: 0 PID: 2991 Comm: syzkaller812301 Not tainted 4.14.0-rc5-mm1+ #20
[   43.251585] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   43.252830] task: ffff8801d1d1a7c0 task.stack: ffff8801d1c40000
[   43.253651] RIP: 0010:asn1_ber_decoder+0x431/0x1c20
[   43.254311] RSP: 0018:ffff8801d1c47908 EFLAGS: 00010246
[   43.255022] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   43.256061] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff851d1208
[   43.257012] RBP: ffff8801d1c47bc0 R08: 0000000000000001 R09: 0000000000000000
[   43.257984] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   43.258952] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801d1c47b98
[   43.259926] FS:  00000000021e8880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   43.261002] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.261777] CR2: 00000000200083d2 CR3: 00000001d0040000 CR4: 00000000001406f0
[   43.262731] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   43.263683] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   43.264674] Call Trace:
[   43.265029]  ? pkcs7_parse_message+0x18a/0x710
[   43.265639]  ? verify_pkcs7_signature+0x8d/0x290
[   43.266274]  ? entry_SYSCALL_64_fastpath+0x1e/0xbe
[   43.268162]  ? depot_save_stack+0x490/0x490
[   43.272450]  ? __lock_is_held+0xb6/0x140
[   43.276483]  ? __lock_is_held+0xb6/0x140
[   43.280513]  ? pkcs7_parse_message+0x18a/0x710
[   43.285062]  ? rcu_read_lock_sched_held+0x108/0x120
[   43.290044]  ? kmem_cache_alloc_trace+0x456/0x750
[   43.294855]  ? lock_release+0xa40/0xa40
[   43.298797]  pkcs7_parse_message+0x2b3/0x710
[   43.303196]  verify_pkcs7_signature+0x8d/0x290
[   43.307748]  ? restrict_link_by_builtin_and_secondary_trusted+0x80/0x80
[   43.314467]  ? __down_interruptible+0x6b0/0x6b0
[   43.319104]  ? current_kernel_time64+0x1d4/0x2f0
[   43.323828]  ? pkcs7_supply_detached_data+0x90/0x90
[   43.328808]  pkcs7_preparse+0x7b/0xc0
[   43.332583]  ? pkcs7_preparse+0xc0/0xc0
[   43.336531]  key_create_or_update+0x4c6/0xe20
[   43.340994]  ? key_type_lookup+0xd0/0xd0
[   43.345021]  ? join_session_keyring+0x300/0x300
[   43.349667]  ? memdup_user+0x5e/0x90
[   43.353347]  SyS_add_key+0x18a/0x340
[   43.357035]  ? key_get_type_from_user.constprop.10+0xd0/0xd0
[   43.362797]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   43.367782]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   43.372502] RIP: 0033:0x43fd79
[   43.375655] RSP: 002b:00007ffdf20f6dc8 EFLAGS: 00000286 ORIG_RAX: 00000000000000f8
[   43.383325] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd79
[   43.390563] RDX: 0000000020000000 RSI: 00000000200083d2 RDI: 0000000020009000
[   43.397796] RBP: 0000000000000082 R08: ffffffffffffffff R09: 0000000000000000
[   43.405031] R10: 0000000000000000 R11: 0000000000000286 R12: 00000000004016e0
[   43.412268] R13: 0000000000401770 R14: 0000000000000000 R15: 0000000000000000
[   43.419512] Code: 1a ff 48 8d 43 01 49 89 87 80 fe ff ff 48 89 85 90 fd ff ff 48 8b 85 b8 fd ff ff 48 01 d8 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 <42> 0f b6 14 32 38 ca 7f 08 84 d2 0f 85 e5 0f 00 00 0f b6 00 88 
[   43.438577] RIP: asn1_ber_decoder+0x431/0x1c20 RSP: ffff8801d1c47908
[   43.445093] ---[ end trace 9b5aae12b7288b1d ]---
[   43.449828] Kernel panic - not syncing: Fatal exception
[   43.455530] Dumping ftrace buffer:
[   43.459035]    (ftrace buffer empty)
[   43.462710] Kernel Offset: disabled
[   43.466303] Rebooting in 86400 seconds..