------------[ cut here ]------------
WARNING: CPU: 1 PID: 6967 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x880/0x1750 net/kcm/kcmsock.c:630
Modules linked in:
CPU: 1 UID: 0 PID: 6967 Comm: syz-executor127 Not tainted 6.13.0-rc1-syzkaller-00025-gfeffde684ac2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:kcm_write_msgs+0x880/0x1750 net/kcm/kcmsock.c:630
Code: 07 48 c1 ea 03 0f b6 04 02 38 c8 7f 08 84 c0 0f 85 64 0e 00 00 41 c6 46 34 01 4c 89 74 24 20 e9 84 f9 ff ff e8 91 99 42 f7 90 <0f> 0b 90 41 bd ea ff ff ff e8 82 99 42 f7 e8 7d 99 42 f7 48 8b 44
RSP: 0018:ffffc9000c3d78f0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888078a2d940 RCX: ffffffff8a57669d
RDX: ffff8880289e2440 RSI: ffffffff8a576c7f RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000002 R12: dffffc0000000000
R13: 0000000000088000 R14: ffff88807a073c80 R15: ffff88807d22a3c0
FS:  00007fc815a166c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020227000 CR3: 0000000024f98000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_sendmsg+0x2539/0x2be0 net/kcm/kcmsock.c:907
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg net/socket.c:726 [inline]
 sock_write_iter+0x4fe/0x5b0 net/socket.c:1147
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0x5ae/0x1150 fs/read_write.c:679
 ksys_write+0x207/0x250 fs/read_write.c:731
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc815a60119
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 91 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:00007fc815a16218 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc815aec428 RCX: 00007fc815a60119
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007fc815aec420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc815ab836c
R13: 00007fc815ab7618 R14: 00000000200011c0 R15: 656c6c616b7a7973
 </TASK>