------------[ cut here ]------------
WARNING: CPU: 1 PID: 7210 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x141d/0x15c0 net/kcm/kcmsock.c:630
Modules linked in:
CPU: 1 UID: 0 PID: 7210 Comm: syz.2.479 Not tainted 6.11.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:kcm_write_msgs+0x141d/0x15c0 net/kcm/kcmsock.c:630
Code: d9 b6 c1 f6 4d 85 f6 74 60 e8 cf b6 c1 f6 48 8b 5c 24 30 48 89 df e8 42 9e ff ff eb 56 e8 bb b6 c1 f6 eb 4a e8 b4 b6 c1 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:ffffc90009aa76e0 EFLAGS: 00010287
RAX: ffffffff8ad1d6cc RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000b01f000 RSI: 00000000000170cb RDI: 00000000000170cc
RBP: ffffc90009aa78d0 R08: ffffffff8ad1cc37 R09: 0000000000000000
R10: ffffc90009aa77e0 R11: fffff52001354f09 R12: 0000000000000140
R13: ffff88807a75b98c R14: ffff888067c18d42 R15: ffff888067c18c00
FS:  00007fea9d5eb6c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000201a2000 CR3: 000000005b084000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_sendmsg+0x2330/0x29a0 net/kcm/kcmsock.c:907
 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: 0033:0x7fea9c779e79
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:00007fea9d5eb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fea9c916058 RCX: 00007fea9c779e79
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000009
RBP: 00007fea9c7e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fea9c916058 R15: 00007fffdd0af308
 </TASK>