syzbot

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WARNING: CPU: 0 PID: 3701 at net/kcm/kcmsock.c:629 kcm_write_msgs+0x10ba/0x1990 net/kcm/kcmsock.c:629
Modules linked in:
CPU: 0 PID: 3701 Comm: syz-executor229 Not tainted 6.0.0-rc5-syzkaller-00094-ga335366bad13 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:kcm_write_msgs+0x10ba/0x1990 net/kcm/kcmsock.c:629
Code: 07 00 00 48 8b 44 24 68 45 31 e4 48 8b 74 24 08 48 89 70 10 e9 d5 f3 ff ff e8 c2 70 f4 f8 0f 0b e9 09 f5 ff ff e8 b6 70 f4 f8 <0f> 0b 41 bc ea ff ff ff e9 b7 f3 ff ff e8 a4 70 f4 f8 48 8b 7c 24
RSP: 0018:ffffc900031679d8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00000000000000c0 RCX: 0000000000000000
RDX: ffff888071d7c040 RSI: ffffffff8886c76a RDI: 0000000000000001
RBP: ffff88807643b0c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000008000
R13: ffff88807162b440 R14: ffff88807643b000 R15: 0000000000000000
FS:  00007fe30f5c5700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000202bf000 CR3: 0000000078cdf000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kcm_sendmsg+0x1dd6/0x23b0 net/kcm/kcmsock.c:1035
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:734
 sock_write_iter+0x291/0x3d0 net/socket.c:1108
 call_write_iter include/linux/fs.h:2187 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x9e9/0xdd0 fs/read_write.c:578
 ksys_write+0x1e8/0x250 fs/read_write.c:631
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe30f634c99
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 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:00007fe30f5c52f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe30f6bd430 RCX: 00007fe30f634c99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007fe30f68a98c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe30f68a068
R13: 656c6c616b7a7973 R14: 0100000000000000 R15: 00007fe30f6bd438
 </TASK>