BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
encrypted_key: master key parameter '' is invalid
encrypted_key: master key parameter '' is invalid
IP: __crypto_alg_lookup+0x43/0x190 crypto/api.c:63
PGD 0 P4D 0 
Oops: 0000 [#1] SMP
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Modules linked in:
CPU: 1 PID: 19654 Comm: cryptomgr_probe 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:ffffc90001303bd8 EFLAGS: 00010293
RAX: ffff8801fc52c780 RBX: 0000000000000000 RCX: ffffffff816741f3
RDX: 0000000000000000 RSI: ffffc90001303dba RDI: ffff8801f979b482
RBP: ffffc90001303c20 R08: 0000000000000001 R09: 0000000000000001
R10: ffffc90001303ba0 R11: 0000000000000000 R12: ffff8801f8c8a600
R13: 00000000ffffffff R14: 000000000000240c R15: 0000000000000405
FS:  0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000020 CR3: 000000000301e002 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+0x63/0x70 crypto/api.c:501
 crypto_grab_spawn+0x2f/0x80 crypto/algapi.c:631
 crypto_grab_skcipher+0x35/0x40 crypto/skcipher.c:920
 crypto_gcm_create_common+0x176/0x420 crypto/gcm.c:645
 crypto_gcm_create+0xa3/0xd0 crypto/gcm.c:726
 cryptomgr_probe+0x40/0x100 crypto/algboss.c:75
 kthread+0x149/0x170 kernel/kthread.c:238
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:524
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: ffffc90001303bd8
CR2: 0000000000000020
---[ end trace 5d73eea5fe629247 ]---
Kernel panic - not syncing: Fatal exception
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Kernel Offset: disabled
Rebooting in 86400 seconds..