BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 0 UID: 0 PID: 7002 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 add_chain_cache kernel/locking/lockdep.c:-1 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x140/0x2e0 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162 __put_partials+0x74/0x1f4 mm/slub.c:3866 put_cpu_partial+0x1d0/0x244 mm/slub.c:3961 __slab_free+0x1dc/0x23c mm/slub.c:5952 do_slab_free mm/slub.c:6616 [inline] ___cache_free+0x150/0x170 mm/slub.c:6735 qlink_free+0x48/0x94 mm/kasan/quarantine.c:163 qlist_free_all+0x44/0xb8 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x118/0x124 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x2c/0x88 mm/kasan/common.c:349 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x344/0x680 mm/slub.c:5270 new_handle fs/jbd2/transaction.c:457 [inline] jbd2__journal_start+0x14c/0x51c fs/jbd2/transaction.c:484 jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:540 ocfs2_start_trans+0x368/0x6b0 fs/ocfs2/journal.c:374 ocfs2_modify_bh+0xe4/0x43c fs/ocfs2/quota_local.c:101 ocfs2_local_free_info+0x644/0x874 fs/ocfs2/quota_local.c:854 dquot_disable+0xe68/0x1750 fs/quota/dquot.c:2307 ocfs2_disable_quotas+0x190/0x1d8 fs/ocfs2/super.c:967 ocfs2_dismount_volume+0x198/0x8c4 fs/ocfs2/super.c:1818 ocfs2_put_super+0xd4/0x320 fs/ocfs2/super.c:1553 generic_shutdown_super+0x12c/0x2b8 fs/super.c:643 kill_block_super+0x44/0x90 fs/super.c:1722 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1318 __cleanup_mnt+0x20/0x30 fs/namespace.c:1325 task_work_run+0x1dc/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 ocfs2: Unmounting device (7,5) on (node local) ================================================================== BUG: KASAN: slab-use-after-free in __list_del_entry_valid_or_report+0x8c/0x1b4 lib/list_debug.c:62 Read of size 8 at addr ffff0000d392e578 by task syz-executor/7002 CPU: 0 UID: 0 PID: 7002 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xa8/0x238 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:482 kasan_report+0xb0/0x110 mm/kasan/report.c:595 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381 __list_del_entry_valid_or_report+0x8c/0x1b4 lib/list_debug.c:62 __list_del_entry_valid include/linux/list.h:132 [inline] __list_del_entry include/linux/list.h:223 [inline] list_del_init include/linux/list.h:295 [inline] bt_accept_unlink+0x40/0x26c net/bluetooth/af_bluetooth.c:259 l2cap_sock_teardown_cb+0x148/0x388 net/bluetooth/l2cap_sock.c:1616 l2cap_chan_del+0xb8/0x498 net/bluetooth/l2cap_core.c:656 l2cap_conn_del+0x2b8/0x53c net/bluetooth/l2cap_core.c:1788 l2cap_disconn_cfm+0x90/0x104 net/bluetooth/l2cap_core.c:7326 hci_disconn_cfm include/net/bluetooth/hci_core.h:2146 [inline] hci_conn_hash_flush+0x108/0x23c net/bluetooth/hci_conn.c:2637 hci_dev_close_sync+0x65c/0xfd0 net/bluetooth/hci_sync.c:5326 hci_dev_do_close net/bluetooth/hci_core.c:501 [inline] hci_unregister_dev+0x204/0x52c net/bluetooth/hci_core.c:2715 vhci_release+0x12c/0x17c drivers/bluetooth/hci_vhci.c:690 __fput+0x340/0x75c fs/file_table.c:468 ____fput+0x20/0x58 fs/file_table.c:496 task_work_run+0x1dc/0x260 kernel/task_work.c:233 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x52c/0x1a1c kernel/exit.c:971 do_group_exit+0x194/0x22c kernel/exit.c:1112 get_signal+0x11dc/0x12f8 kernel/signal.c:3034 arch_do_signal_or_restart+0x268/0x46d4 arch/arm64/kernel/signal.c:1619 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline] exit_to_user_mode_loop+0x88/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Allocated by task 8900: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:77 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:570 poison_kmalloc_redzone mm/kasan/common.c:397 [inline] __kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:414 kasan_kmalloc include/linux/kasan.h:262 [inline] __do_kmalloc_node mm/slub.c:5657 [inline] __kmalloc_noprof+0x410/0x764 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:961 [inline] sk_prot_alloc+0xc4/0x1f0 net/core/sock.c:2245 sk_alloc+0x44/0x3a0 net/core/sock.c:2301 bt_sock_alloc+0x4c/0x300 net/bluetooth/af_bluetooth.c:151 l2cap_sock_alloc net/bluetooth/l2cap_sock.c:1897 [inline] l2cap_sock_create+0x140/0x2f4 net/bluetooth/l2cap_sock.c:1939 bt_sock_create+0x14c/0x24c net/bluetooth/af_bluetooth.c:135 __sock_create+0x43c/0x910 net/socket.c:1605 sock_create net/socket.c:1663 [inline] __sys_socket_create net/socket.c:1700 [inline] __sys_socket+0xd4/0x1c0 net/socket.c:1747 __do_sys_socket net/socket.c:1761 [inline] __se_sys_socket net/socket.c:1759 [inline] __arm64_sys_socket+0x7c/0x94 net/socket.c:1759 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Freed by task 8898: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:77 kasan_save_free_info+0x58/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x74/0xa4 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2540 [inline] slab_free mm/slub.c:6668 [inline] kfree+0x1c4/0x5fc mm/slub.c:6876 sk_prot_free net/core/sock.c:2284 [inline] __sk_destruct+0x5fc/0x924 net/core/sock.c:2384 sk_destruct net/core/sock.c:2412 [inline] __sk_free+0x320/0x430 net/core/sock.c:2423 sk_free+0x60/0xc8 net/core/sock.c:2434 sock_put include/net/sock.h:1998 [inline] l2cap_sock_kill+0x12c/0x25c net/bluetooth/l2cap_sock.c:1265 l2cap_sock_release+0x15c/0x1fc net/bluetooth/l2cap_sock.c:1438 __sock_release net/socket.c:662 [inline] sock_close+0xa0/0x1e4 net/socket.c:1455 __fput+0x340/0x75c fs/file_table.c:468 ____fput+0x20/0x58 fs/file_table.c:496 task_work_run+0x1dc/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 The buggy address belongs to the object at ffff0000d392e000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1400 bytes inside of freed 2048-byte region [ffff0000d392e000, ffff0000d392e800) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113928 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c0002000 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000 head: 05ffc00000000040 ffff0000c0002000 dead000000000100 dead000000000122 head: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000 head: 05ffc00000000003 fffffdffc34e4a01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d392e400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d392e480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000d392e500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000d392e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d392e600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================