device lo entered promiscuous mode BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 IP: __crypto_alg_lookup+0x43/0x190 crypto/api.c:63 PGD 2166f8067 P4D 2166f8067 PUD 1f7b9c067 PMD 0 Oops: 0000 [#1] SMP Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 21615 Comm: syz-executor5 Not tainted 4.15.0-rc3-next-20171214+ #67 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__crypto_alg_lookup+0x43/0x190 crypto/api.c:63 RSP: 0018:ffffc90000dafd70 EFLAGS: 00010216 RAX: 0000000000010000 RBX: 0000000000000000 RCX: ffffffff816741f3 RDX: 00000000000002c7 RSI: ffffc90004ca6000 RDI: ffff880214ed2889 RBP: ffffc90000dafdb8 R08: 0000000000000001 R09: 0000000000000001 R10: ffffc90000dafd38 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000c05 R14: 000000000000240f R15: 000000000000040e FS: 00007fb65b244700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000020 CR3: 00000001f207a002 CR4: 00000000001606e0 Call Trace: crypto_alg_lookup+0x31/0x50 crypto/api.c:201 crypto_larval_lookup.part.8+0x34/0x1c0 crypto/api.c:218 crypto_larval_lookup crypto/api.c:212 [inline] crypto_alg_mod_lookup+0x77/0x120 crypto/api.c:271 crypto_find_alg crypto/api.c:501 [inline] crypto_alloc_tfm+0x67/0x180 crypto/api.c:534 crypto_alloc_shash+0x2c/0x40 crypto/shash.c:436 sctp_listen_start net/sctp/socket.c:7496 [inline] sctp_inet_listen+0x1c1/0x240 net/sctp/socket.c:7584 SYSC_listen net/socket.c:1483 [inline] SyS_listen+0x71/0xb0 net/socket.c:1469 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a09 RSP: 002b:00007fb65b243c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000032 RAX: ffffffffffffffda RBX: 00007fb65b244700 RCX: 0000000000452a09 RDX: 0000000000000000 RSI: 0000000000000400 RDI: 0000000000000013 RBP: 0000000000a2f880 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000 R13: 0000000000a2f7ff R14: 00007fb65b2449c0 R15: 0000000000000003 Code: 89 7d d0 e8 70 61 c4 ff 48 8b 1d 89 df a6 01 48 81 fb 60 21 0e 83 0f 84 4c 01 00 00 c7 45 c4 fe ff ff ff 45 31 e4 e8 4d 61 c4 ff <44> 8b 6b 20 41 f6 c5 60 0f 85 03 01 00 00 e8 3a 61 c4 ff 44 89 RIP: __crypto_alg_lookup+0x43/0x190 crypto/api.c:63 RSP: ffffc90000dafd70 CR2: 0000000000000020 ---[ end trace d802b85fb05e1758 ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..