(syz-executor,5652,0):ocfs2_read_locked_inode:554 ERROR: status = -5 ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x107/0x7c40 kernel/locking/lockdep.c:4933 Read of size 8 at addr ffff88805946e540 by task syz-executor/5652 CPU: 0 PID: 5652 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0xa8/0x210 mm/kasan/report.c:420 kasan_report+0x10b/0x140 mm/kasan/report.c:524 __lock_acquire+0x107/0x7c40 kernel/locking/lockdep.c:4933 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x32/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] bt_accept_unlink+0x5f/0x290 net/bluetooth/af_bluetooth.c:262 l2cap_sock_teardown_cb+0x1af/0x380 net/bluetooth/l2cap_sock.c:1668 l2cap_chan_del+0x8e/0x500 net/bluetooth/l2cap_core.c:695 l2cap_conn_del+0x346/0x5d0 net/bluetooth/l2cap_core.c:1833 hci_disconn_cfm include/net/bluetooth/hci_core.h:1813 [inline] hci_conn_hash_flush+0x113/0x290 net/bluetooth/hci_conn.c:2548 hci_dev_close_sync+0x95e/0x1040 net/bluetooth/hci_sync.c:5304 hci_dev_do_close net/bluetooth/hci_core.c:523 [inline] hci_unregister_dev+0x216/0x500 net/bluetooth/hci_core.c:2717 vhci_release+0x7f/0xd0 drivers/bluetooth/hci_vhci.c:565 __fput+0x20a/0x8b0 fs/file_table.c:320 task_work_run+0x1d0/0x260 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x9d5/0x2570 kernel/exit.c:887 do_group_exit+0x229/0x2e0 kernel/exit.c:1030 __do_sys_exit_group kernel/exit.c:1041 [inline] __se_sys_exit_group kernel/exit.c:1039 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1039 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f5516f9e0d9 Code: Unable to access opcode bytes at 0x7f5516f9e0af. RSP: 002b:00007ffe4fcb43f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f5517034499 RCX: 00007f5516f9e0d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 000000000000000d R08: 0000000000000000 R09: 00007f5517034474 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe4fcb56b0 R13: 00007f5517034474 R14: 000000000004a656 R15: 00007ffe4fcb6780 Allocated by task 8802: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:53 ____kasan_kmalloc mm/kasan/common.c:375 [inline] __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:384 kmalloc include/linux/slab.h:563 [inline] rtnl_newlink+0x10f/0x1f90 net/core/rtnetlink.c:3665 rtnetlink_rcv_msg+0x863/0xfb0 net/core/rtnetlink.c:6166 netlink_rcv_skb+0x1ef/0x440 net/netlink/af_netlink.c:2516 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x7ad/0x920 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x8ad/0xbd0 net/netlink/af_netlink.c:1877 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x5ed/0x9a0 net/socket.c:2519 ___sys_sendmsg+0x2a2/0x360 net/socket.c:2573 __sys_sendmsg net/socket.c:2602 [inline] __do_sys_sendmsg net/socket.c:2611 [inline] __se_sys_sendmsg+0x1c3/0x2b0 net/socket.c:2609 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:46 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:486 call_rcu+0x14f/0x950 kernel/rcu/tree.c:2849 netlink_release+0x157e/0x19b0 net/netlink/af_netlink.c:799 __sock_release net/socket.c:654 [inline] sock_close+0xbf/0x210 net/socket.c:1400 __fput+0x20a/0x8b0 fs/file_table.c:320 task_work_run+0x1d0/0x260 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Second to last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:46 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:486 call_rcu+0x14f/0x950 kernel/rcu/tree.c:2849 netlink_release+0x157e/0x19b0 net/netlink/af_netlink.c:799 __sock_release net/socket.c:654 [inline] sock_close+0xbf/0x210 net/socket.c:1400 __fput+0x20a/0x8b0 fs/file_table.c:320 task_work_run+0x1d0/0x260 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88805946e000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1344 bytes inside of 2048-byte region [ffff88805946e000, ffff88805946e800) The buggy address belongs to the physical page: page:ffffea0001651a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805946a000 pfn:0x59468 head:ffffea0001651a00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001d64808 ffffea00019efe08 ffff888017442000 raw: ffff88805946a000 0000000000080001 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4272, tgid 4272 (syz-executor), ts 84611359945, free_ts 25914401909 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2560 prep_new_page mm/page_alloc.c:2567 [inline] get_page_from_freelist+0x206b/0x2180 mm/page_alloc.c:4358 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5658 alloc_slab_page+0x5d/0x180 mm/slub.c:1799 allocate_slab mm/slub.c:1944 [inline] new_slab+0x87/0x2d0 mm/slub.c:1997 ___slab_alloc+0xbc5/0x1240 mm/slub.c:3154 __slab_alloc mm/slub.c:3240 [inline] slab_alloc_node mm/slub.c:3325 [inline] __kmem_cache_alloc_node+0x126/0x270 mm/slub.c:3398 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc_node_track_caller+0xa0/0x240 mm/slab_common.c:956 kmalloc_reserve net/core/skbuff.c:446 [inline] pskb_expand_head+0x1c0/0x13a0 net/core/skbuff.c:1849 netlink_trim+0x180/0x220 net/netlink/af_netlink.c:1299 netlink_broadcast+0x66/0x10f0 net/netlink/af_netlink.c:1505 nlmsg_multicast include/net/netlink.h:1078 [inline] nlmsg_notify+0xe3/0x1a0 net/netlink/af_netlink.c:2559 __dev_notify_flags+0xef/0x310 net/core/dev.c:8711 rtnl_configure_link+0x21d/0x320 net/core/rtnetlink.c:-1 veth_newlink+0x774/0xd60 drivers/net/veth.c:1751 rtnl_newlink_create net/core/rtnetlink.c:3436 [inline] __rtnl_newlink net/core/rtnetlink.c:3656 [inline] rtnl_newlink+0x14b3/0x1f90 net/core/rtnetlink.c:3669 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1487 [inline] free_pcp_prepare mm/page_alloc.c:1537 [inline] free_unref_page_prepare+0x8e5/0x9e0 mm/page_alloc.c:3414 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3509 free_contig_range+0x9d/0x150 mm/page_alloc.c:9498 destroy_args+0xef/0xa0e mm/debug_vm_pgtable.c:1031 debug_vm_pgtable+0x33c/0x38e mm/debug_vm_pgtable.c:1359 do_one_initcall+0x257/0x800 init/main.c:1270 do_initcall_level+0x13d/0x1ed init/main.c:1343 do_initcalls+0x4b/0x8a init/main.c:1359 kernel_init_freeable+0x401/0x5ab init/main.c:1598 kernel_init+0x19/0x1b0 init/main.c:1486 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Memory state around the buggy address: ffff88805946e400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805946e480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805946e500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805946e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805946e600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================