=============================
sctp: [Deprecated]: syz-executor7 (pid 18881) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
BUG: unable to handle kernel NULL pointer dereference at 000000008c1fa101
IP: virt_to_cache mm/slab.c:400 [inline]
IP: kfree+0xb2/0x250 mm/slab.c:3802
PGD 1d4029067 P4D 1d4029067 PUD 1bea65067 PMD 0 
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 18887 Comm: syz-executor3 Not tainted 4.15.0-rc2+ #147
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: 000000003d14f8a0 task.stack: 000000008dcc075a
RIP: 0010:virt_to_cache mm/slab.c:400 [inline]
RIP: 0010:kfree+0xb2/0x250 mm/slab.c:3802
RSP: 0018:ffff8801c3107660 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8801c3107828 RCX: ffffffffffffffff
RDX: ffffea00070c41c0 RSI: 0000000000000000 RDI: ffff8801c3107828
RBP: ffff8801c3107680 R08: ffffed003aeedc5c R09: 0000000000000000
R10: 0000000000000001 R11: ffffed003aeedc5b R12: 0000000000000286
R13: 0000000000000000 R14: ffff8801c3107828 R15: ffff8801c3107790
FS:  00007f3975755700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000074 CR3: 00000001c5182000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 blkcipher_walk_done+0x72b/0xde0 crypto/blkcipher.c:139
 encrypt+0x50a/0xaf0 crypto/salsa20_generic.c:208
 skcipher_crypt_blkcipher crypto/skcipher.c:622 [inline]
 skcipher_decrypt_blkcipher+0x213/0x310 crypto/skcipher.c:640
 crypto_skcipher_decrypt include/crypto/skcipher.h:463 [inline]
 _skcipher_recvmsg crypto/algif_skcipher.c:144 [inline]
 skcipher_recvmsg+0xa54/0xf20 crypto/algif_skcipher.c:165
 sock_recvmsg_nosec net/socket.c:805 [inline]
 sock_recvmsg+0xc9/0x110 net/socket.c:812
 sock_read_iter+0x361/0x560 net/socket.c:889
 call_read_iter include/linux/fs.h:1766 [inline]
 do_iter_readv_writev+0x607/0x7f0 fs/read_write.c:651
 do_iter_read+0x220/0x5b0 fs/read_write.c:895
 vfs_readv+0x121/0x1c0 fs/read_write.c:959
 do_readv+0xfc/0x2a0 fs/read_write.c:992
 SYSC_readv fs/read_write.c:1079 [inline]
 SyS_readv+0x27/0x30 fs/read_write.c:1076
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a39
RSP: 002b:00007f3975754c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 00000000007580d8 RCX: 0000000000452a39
RDX: 0000000000000002 RSI: 00000000204f9fe0 RDI: 0000000000000018
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ee0b8
R13: 00000000ffffffff R14: 00007f39757556d4 R15: 000000000000000a
Code: c2 48 b8 00 00 00 00 00 ea ff ff 48 89 df 48 c1 ea 0c 48 c1 e2 06 48 01 c2 48 8b 42 20 48 8d 48 ff a8 01 48 0f 45 d1 4c 8b 6a 30 <49> 63 75 74 e8 c5 74 af ff 48 89 de 4c 89 ef 4c 8b 75 08 e8 06 
RIP: virt_to_cache mm/slab.c:400 [inline] RSP: ffff8801c3107660
RIP: kfree+0xb2/0x250 mm/slab.c:3802 RSP: ffff8801c3107660
CR2: 0000000000000074
---[ end trace 80d585ffedb7cef8 ]---