executing program
syzkaller login: [   17.193063] kasan: CONFIG_KASAN_INLINE enabled
[   17.193704] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   17.194418] general protection fault: 0000 [#1] SMP KASAN
[   17.194917] Dumping ftrace buffer:
[   17.195248]    (ftrace buffer empty)
[   17.195577] Modules linked in:
[   17.195910] CPU: 3 PID: 3001 Comm: syzkaller949156 Not tainted 4.14.0-rc7-next-20171103+ #10
[   17.197226] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[   17.198259] task: ffff88003b4f8500 task.stack: ffff88003c7c0000
[   17.199096] RIP: 0010:asn1_ber_decoder+0x41e/0x1af0
[   17.199739] RSP: 0018:ffff88003c7c78d0 EFLAGS: 00010246
[   17.200514] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   17.201437] RDX: 0000000000000000 RSI: ffff880068d39c00 RDI: ffffffff853f1920
[   17.202358] RBP: ffff88003c7c7b88 R08: 0000000000000060 R09: 0000000000000000
[   17.203277] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   17.204207] R13: 0000000000000000 R14: ffff88003c7c7b60 R15: dffffc0000000000
[   17.205127] FS:  00000000024c0880(0000) GS:ffff88006df00000(0000) knlGS:0000000000000000
[   17.206176] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   17.206912] CR2: 00000000200083d2 CR3: 000000006cd31000 CR4: 00000000000006e0
[   17.207841] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   17.208763] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   17.209621] Call Trace:
[   17.209947]  ? pkcs7_parse_message+0x18a/0x730
[   17.210530]  ? verify_pkcs7_signature+0x8d/0x290
[   17.211292]  ? pkcs7_preparse+0x7b/0xc0
[   17.211653]  ? depot_save_stack+0x490/0x490
[   17.212132]  ? __lock_is_held+0xbc/0x140
[   17.212499]  ? __lock_is_held+0xbc/0x140
[   17.212863]  ? pkcs7_parse_message+0x18a/0x730
[   17.213283]  ? rcu_read_lock_sched_held+0x108/0x120
[   17.213729]  ? kmem_cache_alloc_trace+0x459/0x750
[   17.214192]  ? lock_release+0xd70/0xd70
[   17.214548]  pkcs7_parse_message+0x2b3/0x730
[   17.214951]  ? key_task_permission+0x330/0x330
[   17.215359]  ? pkcs7_supply_detached_data+0x90/0x90
[   17.215798]  verify_pkcs7_signature+0x8d/0x290
[   17.216408]  ? restrict_link_by_builtin_and_secondary_trusted+0x80/0x80
[   17.217236]  ? __down_interruptible+0x6b0/0x6b0
[   17.217804]  ? trace_hardirqs_on+0xd/0x10
[   17.218312]  ? current_kernel_time64+0x1d4/0x2f0
[   17.218923]  ? pkcs7_supply_detached_data+0x90/0x90
[   17.219540]  pkcs7_preparse+0x7b/0xc0
[   17.220031]  ? pkcs7_preparse+0xc0/0xc0
[   17.220389]  key_create_or_update+0x533/0x1040
[   17.220801]  ? key_type_lookup+0xd0/0xd0
[   17.221175]  ? join_session_keyring+0x300/0x300
[   17.221579]  ? mem_cgroup_commit_charge+0x111/0x750
[   17.222040]  ? memdup_user+0x5e/0x90
[   17.222377]  SyS_add_key+0x18a/0x340
[   17.222701]  ? key_get_type_from_user.constprop.10+0xd0/0xd0
[   17.223219]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   17.223655]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   17.224157] RIP: 0033:0x434f39
[   17.224434] RSP: 002b:00007ffddfaaa0c8 EFLAGS: 00000286 ORIG_RAX: 00000000000000f8
[   17.225183] RAX: ffffffffffffffda RBX: 00000000004002b0 RCX: 0000000000434f39
[   17.225804] RDX: 0000000020000000 RSI: 00000000200083d2 RDI: 0000000020009000
[   17.226471] RBP: 0000000000000086 R08: ffffffffffffffff R09: 0000000000000000
[   17.227138] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000000
[   17.227785] R13: 00000000004018b0 R14: 0000000000401940 R15: 0000000000000000
[   17.228747] 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 
[   17.231386] RIP: asn1_ber_decoder+0x41e/0x1af0 RSP: ffff88003c7c78d0
[   17.232175] ---[ end trace fb308f7f8a1c2c73 ]---
[   17.232676] Kernel panic - not syncing: Fatal exception
[   17.235921] Dumping ftrace buffer:
[   17.236293]    (ftrace buffer empty)
[   17.236617] Kernel Offset: disabled
[   17.236935] Rebooting in 86400 seconds..