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: 1 PID: 2995 Comm: syzkaller181830 Not tainted 4.14.0-rc5-mm1+ #20 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801d1d2a7c0 task.stack: ffff8801c1700000 RIP: 0010:asn1_ber_decoder+0x431/0x1c20 lib/asn1_decoder.c:233 RSP: 0018:ffff8801c1707908 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff851d1208 RBP: ffff8801c1707bc0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801c1707b98 FS: 0000000000b16880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020f49ffb CR3: 00000001cfbc6000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pkcs7_parse_message+0x2b3/0x710 crypto/asymmetric_keys/pkcs7_parser.c:136 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+0x4c6/0xe20 security/keys/key.c:846 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: 0033:0x43fd89 RSP: 002b:00007ffc2bd26b38 EFLAGS: 00000286 ORIG_RAX: 00000000000000f8 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd89 RDX: 0000000020000000 RSI: 0000000020f49ffb RDI: 0000000020f4a000 RBP: 0000000000000082 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 00000000004016f0 R13: 0000000000401780 R14: 0000000000000000 R15: 0000000000000000 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 RIP: asn1_ber_decoder+0x431/0x1c20 lib/asn1_decoder.c:233 RSP: ffff8801c1707908 ---[ end trace a0c855ee92a6da8b ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..