[syzbot] [net?] WARNING: ODEBUG bug in __sk_destruct (3)

[syzbot <syzbot+d199b52665b6c3069b94@syzkaller.appspotmail.com>]

Hello,

syzbot found the following issue on:

HEAD commit:    7abc678e3084 Merge tag 'pmdomain-v6.16-rc2' of git://git.k..
git tree:       bpf
console output: https://syzkaller.appspot.com/x/log.txt?x=11b0a4f0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=12b5044868deb866
dashboard link: https://syzkaller.appspot.com/bug?extid=d199b52665b6c3069b94
compiler:       Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14a20f22580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12af2f22580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/8a9fc2a6bfdf/disk-7abc678e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/29375cef95f6/vmlinux-7abc678e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8148ffc5b47b/bzImage-7abc678e.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d199b52665b6c3069b94@syzkaller.appspotmail.com

------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88807dcf7668 object type: work_struct hint: kcm_tx_work+0x0/0x180 net/kcm/kcmsock.c:-1
WARNING: CPU: 0 PID: 6293 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 6293 Comm: syz.0.87 Not tainted 6.16.0-rc6-syzkaller-g7abc678e3084 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 e7 b7 5b fd 4d 8b 0f 48 c7 c7 a0 95 e2 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 da 93 bd fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 c7 85 db 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc900021efb30 EFLAGS: 00010296
RAX: f0e2d1323eb60c00 RBX: dffffc0000000000 RCX: ffff88802699da00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfaa6c R12: ffffffff8a9e4d50
R13: ffffffff8be29720 R14: ffff88807dcf7668 R15: ffffffff8b89dd60
FS:  00007f6914e486c0(0000) GS:ffff888125c23000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6914e47f98 CR3: 00000000288b8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
 debug_check_no_obj_freed+0x3a2/0x470 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2312 [inline]
 slab_free mm/slub.c:4643 [inline]
 kmem_cache_free+0x113/0x400 mm/slub.c:4745
 sk_prot_free net/core/sock.c:2284 [inline]
 __sk_destruct+0x4d2/0x660 net/core/sock.c:2381
 kcm_release+0x528/0x5c0 net/kcm/kcmsock.c:1731
 __sock_release net/socket.c:647 [inline]
 sock_close+0xc0/0x240 net/socket.c:1391
 __fput+0x44c/0xa70 fs/file_table.c:465
 fput_close_sync+0x119/0x200 fs/file_table.c:570
 __do_sys_close fs/open.c:1589 [inline]
 __se_sys_close fs/open.c:1574 [inline]
 __x64_sys_close+0x7f/0x110 fs/open.c:1574
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6913f8e9a9
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:00007f6914e48038 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007f69141b6160 RCX: 00007f6913f8e9a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f6914010d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f69141b6160 R15: 00007ffe8d790a18
 </TASK>


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup