------------[ cut here ]------------
WARNING: CPU: 1 PID: 12103 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x141d/0x15c0 net/kcm/kcmsock.c:630
Modules linked in:
CPU: 1 PID: 12103 Comm: syz.3.2397 Not tainted 6.10.0-syzkaller-04472-g51835949dda3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:kcm_write_msgs+0x141d/0x15c0 net/kcm/kcmsock.c:630
Code: 49 41 ef f6 4d 85 f6 74 60 e8 3f 41 ef f6 48 8b 5c 24 30 48 89 df e8 52 9e ff ff eb 56 e8 2b 41 ef f6 eb 4a e8 24 41 ef f6 90 <0f> 0b 90 41 bd ea ff ff ff 49 bc 00 00 00 00 00 fc ff df eb 2f e8
RSP: 0018:ffffc9000ca0f6e0 EFLAGS: 00010287
RAX: ffffffff8aa719dc RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000a55f000 RSI: 0000000000035b64 RDI: 0000000000035b65
RBP: ffffc9000ca0f8d0 R08: ffffffff8aa70f47 R09: 0000000000000000
R10: ffffc9000ca0f7e0 R11: fffff52001941f09 R12: 0000000000000140
R13: ffff88805ae1ac0c R14: ffff88805f211042 R15: ffff88805f210f00
FS:  00007efd82c8e6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fb13ff8 CR3: 0000000061f7a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_sendmsg+0x21bb/0x27d0 net/kcm/kcmsock.c:906
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 sock_write_iter+0x2dd/0x400 net/socket.c:1160
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa72/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efd81f75a99
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efd82c8e048 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007efd82104038 RCX: 00007efd81f75a99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007efd81fe4e5d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007efd82104038 R15: 00007fff08b460b8
 </TASK>