------------[ cut here ]------------
WARNING: CPU: 0 PID: 5052 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x14b1/0x1590
Modules linked in:
CPU: 0 PID: 5052 Comm: syz-executor776 Not tainted 6.4.0-syzkaller-11311-g24be4d0b46bb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:kcm_write_msgs+0x14b1/0x1590 net/kcm/kcmsock.c:630
Code: 25 28 00 00 00 48 3b 84 24 a0 01 00 00 0f 85 e2 00 00 00 44 89 e8 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 7f 73 9e f7 <0f> 0b eb 07 e8 76 73 9e f7 0f 0b 41 bd ea ff ff ff e9 4b ff ff ff
RSP: 0018:ffffc90003e1f740 EFLAGS: 00010293
RAX: ffffffff89ed8e71 RBX: 0000000000000000 RCX: ffff88802ddf5940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003e1f930 R08: ffffffff89ed820d R09: 0000000000000000
R10: ffffc90003e1f840 R11: fffff520007c3f15 R12: dffffc0000000000
R13: 0000000000088000 R14: ffff8880204e370c R15: ffff8880204e3710
FS:  00007fdde5f72700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020223000 CR3: 000000007e112000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_sendmsg+0x21f5/0x2820 net/kcm/kcmsock.c:905
 sock_sendmsg_nosec net/socket.c:725 [inline]
 sock_sendmsg net/socket.c:748 [inline]
 sock_write_iter+0x39a/0x520 net/socket.c:1129
 call_write_iter include/linux/fs.h:1871 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x782/0xaf0 fs/read_write.c:584
 ksys_write+0x1a0/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fdde67d06a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 31 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdde5f72208 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fdde6859288 RCX: 00007fdde67d06a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007fdde6859280 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdde685928c
R13: 00007ffec7b6a7bf R14: 00007fdde5f72300 R15: 0000000000022000
 </TASK>