TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
netlink: 28 bytes leftover after parsing attributes in process `syz-executor4'.
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
MINIX-fs: bad superblock or unable to read bitmaps
CPU: 1 PID: 10819 Comm: syz-executor3 Not tainted 4.18.0-rc7-next-20180803+ #31
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:smc_ioctl+0x880/0x1250 net/smc/af_smc.c:1737
Code: 48 c1 ea 03 80 3c 02 00 0f 85 e4 07 00 00 4c 8b ab 98 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7d 20 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e c2 07 00 00 4c 8d bb f8 04 00
RSP: 0018:ffff8801969bf5c8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8801d96db140 RCX: ffffc90009e98000
netlink: 28 bytes leftover after parsing attributes in process `syz-executor4'.
RDX: 0000000000000004 RSI: ffffffff8684dfd2 RDI: 0000000000000020
RBP: ffff8801969bf9b0 R08: ffff8801957ec040 R09: 0000000000000000
R10: ffffed003b2db639 R11: ffff8801d96db1cb R12: 1ffff10032d37ebd
R13: 0000000000000000 R14: 0000000020000040 R15: 0000000000000001
FS:  00007f2effa19700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f0a804730 CR3: 0000000196deb000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 sock_do_ioctl+0xe4/0x3e0 net/socket.c:950
 sock_ioctl+0x30d/0x680 net/socket.c:1074
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702
 __do_sys_ioctl fs/ioctl.c:709 [inline]
 __se_sys_ioctl fs/ioctl.c:707 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456b29
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2effa18c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2effa196d4 RCX: 0000000000456b29
RDX: 0000000020000040 RSI: 0000000000005411 RDI: 0000000000000014
RBP: 0000000000930140 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d1130 R14: 00000000004c6c16 R15: 0000000000000001
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 42c1f8020cdcc893 ]---
RIP: 0010:smc_ioctl+0x880/0x1250 net/smc/af_smc.c:1737
Code: 48 c1 ea 03 80 3c 02 00 0f 85 e4 07 00 00 4c 8b ab 98 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7d 20 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e c2 07 00 00 4c 8d bb f8 04 00
RSP: 0018:ffff8801969bf5c8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8801d96db140 RCX: ffffc90009e98000
RDX: 0000000000000004 RSI: ffffffff8684dfd2 RDI: 0000000000000020
RBP: ffff8801969bf9b0 R08: ffff8801957ec040 R09: 0000000000000000
R10: ffffed003b2db639 R11: ffff8801d96db1cb R12: 1ffff10032d37ebd
R13: 0000000000000000 R14: 0000000020000040 R15: 0000000000000001
FS:  00007f2effa19700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f0a804730 CR3: 0000000196deb000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400