__sys_sendmsg+0x115/0x270 net/socket.c:2155
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
 __do_sys_sendmsg net/socket.c:2164 [inline]
 __se_sys_sendmsg net/socket.c:2162 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
CPU: 0 PID: 32430 Comm: syz-executor4 Not tainted 4.17.0-rc4+ #55
RIP: 0033:0x455a09
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RSP: 002b:00007ff8fed74c68 EFLAGS: 00000246
RIP: 0010:smc_ioctl+0x3dc/0x9f0 net/smc/af_smc.c:1499
 ORIG_RAX: 000000000000002e
RSP: 0018:ffff8801961af770 EFLAGS: 00010202
RAX: ffffffffffffffda RBX: 00007ff8fed756d4 RCX: 0000000000455a09
RDX: 0000000020000041 RSI: 0000000020001480 RDI: 0000000000000013
RAX: dffffc0000000000 RBX: ffff8801b4f707c0 RCX: ffffc90009302000
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
RDX: 0000000000000004 RSI: ffffffff87411b4e RDI: 0000000000000020
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000014
RBP: ffff8801961af9d0 R08: ffff880198830340 R09: ffffed003b5c46c2
R13: 000000000000057f R14: 00000000006fc488 R15: 000000000000000f
R10: 0000000000000003 R11: 0000000000000000 R12: 1ffff10032c35ef1
R13: 0000000020000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f28ed319700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055603b342460 CR3: 00000001b080e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 sock_do_ioctl+0xe4/0x3e0 net/socket.c:957
 sock_ioctl+0x30d/0x680 net/socket.c:1081
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1cf/0x16a0 fs/ioctl.c:684
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
 __do_sys_ioctl fs/ioctl.c:708 [inline]
 __se_sys_ioctl fs/ioctl.c:706 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455a09
RSP: 002b:00007f28ed318c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f28ed3196d4 RCX: 0000000000455a09
RDX: 0000000020000000 RSI: 0000000000005411 RDI: 0000000000000017
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000044b R14: 00000000006fa7a8 R15: 0000000000000000
Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 7d 05 00 00 4c 8b b3 90 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 20 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 47 05 00 00 45 8b 7e 20 4c 
RIP: smc_ioctl+0x3dc/0x9f0 net/smc/af_smc.c:1499 RSP: ffff8801961af770
---[ end trace 527b5b418e5a707e ]---