kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 2997 Comm: syzkaller259522 Not tainted 4.14.0-rc7-next-20171103+ #38 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801ce416040 task.stack: ffff8801ce240000 RIP: 0010:asn1_ber_decoder+0x41e/0x1af0 lib/asn1_decoder.c:233 RSP: 0018:ffff8801ce2478d0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8801ce1e6900 RDI: ffffffff853f1920 RBP: ffff8801ce247b88 R08: 0000000000000060 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff8801ce247b60 R15: dffffc0000000000 FS: 0000000001aba880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020e5d000 CR3: 00000001d0c41000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pkcs7_parse_message+0x2b3/0x730 crypto/asymmetric_keys/pkcs7_parser.c:139 verify_pkcs7_signature+0x8d/0x290 certs/system_keyring.c:216 pkcs7_preparse+0x7b/0xc0 crypto/asymmetric_keys/pkcs7_key_type.c:63 key_create_or_update+0x533/0x1040 security/keys/key.c:855 SYSC_add_key security/keys/keyctl.c:122 [inline] SyS_add_key+0x18a/0x340 security/keys/keyctl.c:62 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x43fcd9 RSP: 002b:00007ffe47bac7f8 EFLAGS: 00000217 ORIG_RAX: 00000000000000f8 RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fcd9 RDX: 0000000020000000 RSI: 0000000020bc4ffb RDI: 0000000020e5cff5 RBP: 0000000000000086 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401640 R13: 00000000004016d0 R14: 0000000000000000 R15: 0000000000000000 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 RIP: asn1_ber_decoder+0x41e/0x1af0 lib/asn1_decoder.c:233 RSP: ffff8801ce2478d0 ---[ end trace f22b26e28796f76b ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..