Use struct sctp_assoc_value instead
BUG: unable to handle kernel paging request at ffffffff00000001
IP: crypto_chacha20_init crypto/chacha20_generic.c:52 [inline]
IP: crypto_chacha20_crypt+0x557/0xbd0 crypto/chacha20_generic.c:85
PGD 6228067 P4D 6228067 PUD 0 
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 9010 Comm: syz-executor2 Not tainted 4.15.0-rc2-next-20171208+ #63
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:crypto_chacha20_init crypto/chacha20_generic.c:52 [inline]
RIP: 0010:crypto_chacha20_crypt+0x557/0xbd0 crypto/chacha20_generic.c:85
RSP: 0018:ffff8801bff47680 EFLAGS: 00010246
RAX: ffff8801bff476f0 RBX: 00000000e6000000 RCX: ffffffff8226e85b
RDX: 0000000000000000 RSI: ffffc90002e01000 RDI: ffff8801bff4771c
RBP: ffff8801bff478a0 R08: ffffed003a9d03cc R09: ffff8801d4e81e40
R10: ffff8801bff478b8 R11: ffffed003a9d03cb R12: 0000000000000000
R13: ffffffff00000001 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f9f6e78d700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff00000001 CR3: 00000001d386e000 CR4: 00000000001426f0
Call Trace:
 crypto_skcipher_decrypt include/crypto/skcipher.h:463 [inline]
 _skcipher_recvmsg crypto/algif_skcipher.c:126 [inline]
 skcipher_recvmsg+0x739/0xf20 crypto/algif_skcipher.c:165
 sock_recvmsg_nosec net/socket.c:809 [inline]
 sock_recvmsg+0xc9/0x110 net/socket.c:816
 sock_read_iter+0x361/0x560 net/socket.c:893
 call_read_iter include/linux/fs.h:1770 [inline]
 aio_read+0x2b0/0x3a0 fs/aio.c:1501
 io_submit_one fs/aio.c:1611 [inline]
 do_io_submit+0xf99/0x14f0 fs/aio.c:1682
 SYSC_io_submit fs/aio.c:1707 [inline]
 SyS_io_submit+0x27/0x30 fs/aio.c:1704
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a39
RSP: 002b:00007f9f6e78cc58 EFLAGS: 00000212 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00000000007580d8 RCX: 0000000000452a39
RDX: 0000000020738000 RSI: 0000000000000002 RDI: 00007f9f6e76c000
RBP: 00000000000003f3 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f3f68
R13: 00000000ffffffff R14: 00007f9f6e78d6d4 R15: 000000000000000a
Code: df 89 9d 7c fe ff ff 48 c1 ea 03 0f b6 14 02 4c 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 99 05 00 00 48 8b 85 28 fe ff ff <41> 8b 5d 00 48 8d 78 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 
RIP: crypto_chacha20_init crypto/chacha20_generic.c:52 [inline] RSP: ffff8801bff47680
RIP: crypto_chacha20_crypt+0x557/0xbd0 crypto/chacha20_generic.c:85 RSP: ffff8801bff47680
CR2: ffffffff00000001
---[ end trace 220dd18df4aea473 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..