------------[ cut here ]------------ WARNING: CPU: 1 PID: 6620 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x880/0x1750 net/kcm/kcmsock.c:630 Modules linked in: CPU: 1 UID: 0 PID: 6620 Comm: syz-executor.3 Not tainted 6.12.0-rc7-syzkaller-00125-gcfaaa7d010d1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 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 c1 33 48 f7 90 <0f> 0b 90 41 bd ea ff ff ff e8 b2 33 48 f7 e8 ad 33 48 f7 48 8b 44 RSP: 0018:ffffc9000b6df8f0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888030773140 RCX: ffffffff8a4540ad RDX: ffff88802d763c00 RSI: ffffffff8a45468f RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000088000 R14: ffff88807c96f140 R15: ffff888065a8de40 FS: 00007fa47a3dd6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020090000 CR3: 000000006b94a000 CR4: 0000000000350ef0 Call Trace: kcm_sendmsg+0x2539/0x2be0 net/kcm/kcmsock.c:907 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg net/socket.c:744 [inline] sock_write_iter+0x501/0x5b0 net/socket.c:1165 new_sync_write fs/read_write.c:590 [inline] vfs_write+0x5b1/0x1150 fs/read_write.c:683 ksys_write+0x1fa/0x260 fs/read_write.c:736 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: 0033:0x7fa47b07cda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007fa47a3dd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fa47b1ac050 RCX: 00007fa47b07cda9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 00007fa47b0c947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fa47b1ac050 R15: 00007ffe7a1eea28