R13: 00007f8294b7cbc8 R14: 00000000004b75fb R15: 0000000000000000
kasan: CONFIG_KASAN_INLINE enabled
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: 5406 Comm: syz-executor7 Not tainted 4.15.0-rc2+ #152
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:compound_head include/linux/page-flags.h:147 [inline]
RIP: 0010:put_page include/linux/mm.h:850 [inline]
RIP: 0010:af_alg_free_areq_sgls+0x5d1/0xab0 crypto/af_alg.c:678
RSP: 0018:ffff8801c46d78f8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff823a0f2a
RDX: 000000000000b3d2 RSI: ffffc900018ff000 RDI: 0000000000000000
RBP: ffff8801c46d7af0 R08: 1ffff100388daea3 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8801d4528740 R15: ffffed00388daf51
FS:  00007f8294b7d700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004d4384 CR3: 00000001caec2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 af_alg_free_resources+0x36/0x80 crypto/af_alg.c:1030
 _skcipher_recvmsg crypto/algif_skcipher.c:152 [inline]
 skcipher_recvmsg+0x8e5/0xf20 crypto/algif_skcipher.c:165
 skcipher_recvmsg_nokey+0x60/0x80 crypto/algif_skcipher.c:284
 sock_recvmsg_nosec net/socket.c:809 [inline]
 sock_recvmsg+0xc9/0x110 net/socket.c:816
 SYSC_recvfrom+0x2dc/0x570 net/socket.c:1779
 SyS_recvfrom+0x40/0x50 net/socket.c:1751
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a39
RSP: 002b:00007f8294b7cc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002d
RAX: ffffffffffffffda RBX: 00007f8294b7caa0 RCX: 0000000000452a39
RDX: 0000000000000001 RSI: 00000000202edf28 RDI: 0000000000000014
RBP: 00007f8294b7ca90 R08: 0000000020000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b75fb
R13: 00007f8294b7cbc8 R14: 00000000004b75fb R15: 0000000000000000
Code: 00 00 48 8d 45 98 48 bb 00 00 00 00 00 fc ff df 48 89 85 48 fe ff ff 48 c1 e8 03 4c 8d 3c 18 e8 e6 28 36 ff 4c 89 e0 48 c1 e8 03 <80> 3c 18 00 0f 85 4b 03 00 00 49 8b 04 24 48 83 e0 fc 48 89 85 
RIP: compound_head include/linux/page-flags.h:147 [inline] RSP: ffff8801c46d78f8
RIP: put_page include/linux/mm.h:850 [inline] RSP: ffff8801c46d78f8
RIP: af_alg_free_areq_sgls+0x5d1/0xab0 crypto/af_alg.c:678 RSP: ffff8801c46d78f8
---[ end trace 105864e0fbe401d6 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..