------------[ cut here ]------------
WARNING: CPU: 2 PID: 6701 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x83e/0x16f0 net/kcm/kcmsock.c:630
Modules linked in:
CPU: 2 PID: 6701 Comm: syz-executor179 Not tainted 6.9.0-rc2-syzkaller-00207-ge8b0ccb2a787 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:kcm_write_msgs+0x83e/0x16f0 net/kcm/kcmsock.c:630
Code: 07 48 c1 ea 03 0f b6 04 02 38 c8 7f 08 84 c0 0f 85 47 0e 00 00 41 c6 46 34 01 4c 89 74 24 20 e9 c6 f9 ff ff e8 13 6d 88 f7 90 <0f> 0b 90 41 bd ea ff ff ff e8 04 6d 88 f7 e8 ff 6c 88 f7 48 8b 44
RSP: 0018:ffffc900035a78f8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88802f9d2540 RCX: ffffffff8a04ff9d
RDX: ffff88801db4c880 RSI: ffffffff8a05053d RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000088000 R14: ffff888024e5ec80 R15: ffff888035d4e100
FS:  00007f51b82086c0(0000) GS:ffff88806b200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020225000 CR3: 000000002cbbc000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_sendmsg+0x22b9/0x2920 net/kcm/kcmsock.c:906
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 sock_write_iter+0x50a/0x5c0 net/socket.c:1160
 call_write_iter include/linux/fs.h:2110 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x6db/0x1100 fs/read_write.c:590
 ksys_write+0x1f8/0x260 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7f51b8252349
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 1a 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f51b8208218 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f51b82dd428 RCX: 00007f51b8252349
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f51b82dd420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f51b82a9ce4
R13: 00007f51b82a9658 R14: 0000000020000240 R15: 656c6c616b7a7973
 </TASK>