------------[ cut here ]------------ WARNING: CPU: 1 PID: 14091 at net/kcm/kcmsock.c:630 kcm_write_msgs+0x83e/0x16f0 net/kcm/kcmsock.c:630 Modules linked in: CPU: 1 UID: 0 PID: 14091 Comm: syz.0.2686 Not tainted 6.10.0-syzkaller-11840-g933069701c1b #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:kcm_write_msgs+0x83e/0x16f0 net/kcm/kcmsock.c:630 Code: 07 48 c1 ea 03 0f b6 04 02 38 c8 7f 08 84 c0 0f 85 49 0e 00 00 41 c6 46 34 01 4c 89 74 24 20 e9 c6 f9 ff ff e8 f3 75 76 f7 90 <0f> 0b 90 41 bd ea ff ff ff e8 e4 75 76 f7 e8 df 75 76 f7 48 8b 44 RSP: 0018:ffffc90003577900 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffff88802335c440 RCX: ffffc9002dbe4000 RDX: 0000000000040000 RSI: ffffffff8a140f4d RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000011000 R14: ffff88804423fb80 R15: ffff88805b784000 FS: 00007fc7929bd6c0(0000) GS:ffff88806b100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc7929ddfa8 CR3: 0000000045a18000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x22bd/0x2920 net/kcm/kcmsock.c:906 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] sock_write_iter+0x50a/0x5c0 net/socket.c:1160 new_sync_write fs/read_write.c:497 [inline] vfs_write+0x6b6/0x1140 fs/read_write.c:590 ksys_write+0x1f8/0x260 fs/read_write.c:643 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: 0033:0x7fc792f75b59 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:00007fc7929bd048 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fc793106110 RCX: 00007fc792f75b59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007 RBP: 00007fc792fe4e5d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fc793106110 R15: 00007ffe8123f0c8