------------[ cut here ]------------
WARNING: CPU: 0 PID: 5463 at net/kcm/kcmsock.c:634 kcm_write_msgs+0x10ba/0x1990 net/kcm/kcmsock.c:634
Modules linked in:
CPU: 0 PID: 5463 Comm: syz-executor.3 Not tainted 6.1.0-rc5-syzkaller-00144-g84368d882b96 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:kcm_write_msgs+0x10ba/0x1990 net/kcm/kcmsock.c:634
Code: 07 00 00 48 8b 44 24 68 45 31 e4 48 8b 74 24 08 48 89 70 10 e9 d5 f3 ff ff e8 02 53 94 f8 0f 0b e9 09 f5 ff ff e8 f6 52 94 f8 <0f> 0b 41 bc ea ff ff ff e9 b7 f3 ff ff e8 e4 52 94 f8 48 8b 7c 24
RSP: 0018:ffffc90002f0f7a8 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 00000000000000c0 RCX: ffffc900065b1000
RDX: 0000000000040000 RSI: ffffffff88eae92a RDI: 0000000000000001
RBP: ffff88801d62b4c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000008000
R13: ffff88802a533bc0 R14: ffff88801d62b400 R15: 0000000000000000
FS:  00007f7742f8e700(0000) GS:ffff88802c600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000d02aec CR3: 000000005d177000 CR4: 0000000000150ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_sendmsg+0x1db2/0x2370 net/kcm/kcmsock.c:1040
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 ____sys_sendmsg+0x334/0x8c0 net/socket.c:2482
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536
 __sys_sendmmsg+0x18f/0x460 net/socket.c:2622
 __do_sys_sendmmsg net/socket.c:2651 [inline]
 __se_sys_sendmmsg net/socket.c:2648 [inline]
 __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2648
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f774228b639
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7742f8e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f77423ac050 RCX: 00007f774228b639
RDX: 0000000000000001 RSI: 0000000020001f00 RDI: 0000000000000004
RBP: 00007f77422e6ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000240008d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc8911b0ff R14: 00007f7742f8e300 R15: 0000000000022000
 </TASK>