Hello, syzbot found the following issue on: HEAD commit: 4774cfe3543a Merge tag 'scsi-fixes' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=140f4e82580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3a936e3316f9e2dc dashboard link: https://syzkaller.appspot.com/bug?extid=60db000b8468baeddbb1 compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/202021f78569/disk-4774cfe3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/694d0f540b2c/vmlinux-4774cfe3.xz kernel image: https://storage.googleapis.com/syzbot-assets/c3c1a8d42953/bzImage-4774cfe3.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+60db000b8468baeddbb1@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ ODEBUG: free active (active state 0) object: ffff888055e82a78 object type: timer_list hint: br_ip6_multicast_port_query_expired+0x0/0x20 net/bridge/br_multicast.c:1682 WARNING: CPU: 0 PID: 15 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612 Modules linked in: CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.16.0-rc1-syzkaller-00203-g4774cfe3543a #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 17 37 5c fd 4d 8b 0f 48 c7 c7 a0 90 e2 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 4a 6a bc fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 77 9d d9 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 RSP: 0000:ffffc90000147758 EFLAGS: 00010282 RAX: bfb6a7e7ba7ad600 RBX: dffffc0000000000 RCX: ffff88801cef3c00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1bfa9e4 R12: ffffffff8a423ca0 R13: ffffffff8be29220 R14: ffff888055e82a78 R15: ffffffff8b8ce020 FS: 0000000000000000(0000) GS:ffff888125c52000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8371b71d60 CR3: 000000005b468000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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] kfree+0x112/0x440 mm/slub.c:4842 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x22b/0x480 lib/kobject.c:737 rcu_do_batch kernel/rcu/tree.c:2576 [inline] rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2832 handle_softirqs+0x286/0x870 kernel/softirq.c:579 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:164 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </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@xxxxxxxxxxxxxxxx. 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 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
