Hello, syzbot found the following issue on: HEAD commit: 245c8e81741b Merge tag 'sched-urgent-2024-04-28' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13442937180000 kernel config: https://syzkaller.appspot.com/x/.config?x=6116da4b97be0ef9 dashboard link: https://syzkaller.appspot.com/bug?extid=e8651419c44dbc2b8768 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-245c8e81.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2d0aae04fb14/vmlinux-245c8e81.xz kernel image: https://storage.googleapis.com/syzbot-assets/352fcab192b7/bzImage-245c8e81.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e8651419c44dbc2b8768@xxxxxxxxxxxxxxxxxxxxxxxxx read_mapping_page failed! diRead: read_metapage failed jfs_lookup: iget failed on inum 32 ====================================================== WARNING: possible circular locking dependency detected 6.9.0-rc5-syzkaller-00370-g245c8e81741b #0 Not tainted ------------------------------------------------------ syz-executor.1/7334 is trying to acquire lock: ffff888065ad4078 (&hdev->lock){+.+.}-{3:3}, at: mgmt_remove_adv_monitor_complete+0x9e/0x2e0 net/bluetooth/mgmt.c:5438 but task is already holding lock: ffff888065ad4970 (&hdev->cmd_sync_work_lock){+.+.}-{3:3}, at: hci_cmd_sync_clear+0x4a/0x100 net/bluetooth/hci_sync.c:591 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&hdev->cmd_sync_work_lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 hci_cmd_sync_lookup_entry net/bluetooth/hci_sync.c:733 [inline] hci_cmd_sync_queue_once net/bluetooth/hci_sync.c:715 [inline] hci_update_passive_scan+0x206/0x380 net/bluetooth/hci_sync.c:3085 le_conn_complete_evt+0x1d2/0x1de0 net/bluetooth/hci_event.c:5911 hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5922 hci_le_meta_evt+0x2e2/0x5d0 net/bluetooth/hci_event.c:7231 hci_event_func net/bluetooth/hci_event.c:7542 [inline] hci_event_packet+0x664/0x1190 net/bluetooth/hci_event.c:7597 hci_rx_work+0x2c4/0x1610 net/bluetooth/hci_core.c:4171 process_one_work+0x902/0x1a30 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #0 (&hdev->lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 mgmt_remove_adv_monitor_complete+0x9e/0x2e0 net/bluetooth/mgmt.c:5438 _hci_cmd_sync_cancel_entry.constprop.0+0x6c/0x1d0 net/bluetooth/hci_sync.c:578 hci_cmd_sync_clear+0xac/0x100 net/bluetooth/hci_sync.c:593 hci_unregister_dev+0x188/0x600 net/bluetooth/hci_core.c:2767 vhci_release+0x7f/0x100 drivers/bluetooth/hci_vhci.c:674 __fput+0x270/0xb80 fs/file_table.c:422 task_work_run+0x14e/0x250 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa7d/0x2c10 kernel/exit.c:878 do_group_exit+0xd3/0x2a0 kernel/exit.c:1027 __do_sys_exit_group kernel/exit.c:1038 [inline] __se_sys_exit_group kernel/exit.c:1036 [inline] __ia32_sys_exit_group+0x3e/0x50 kernel/exit.c:1036 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&hdev->cmd_sync_work_lock); lock(&hdev->lock); lock(&hdev->cmd_sync_work_lock); lock(&hdev->lock); *** DEADLOCK *** 1 lock held by syz-executor.1/7334: #0: ffff888065ad4970 (&hdev->cmd_sync_work_lock){+.+.}-{3:3}, at: hci_cmd_sync_clear+0x4a/0x100 net/bluetooth/hci_sync.c:591 stack backtrace: CPU: 2 PID: 7334 Comm: syz-executor.1 Not tainted 6.9.0-rc5-syzkaller-00370-g245c8e81741b #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 mgmt_remove_adv_monitor_complete+0x9e/0x2e0 net/bluetooth/mgmt.c:5438 _hci_cmd_sync_cancel_entry.constprop.0+0x6c/0x1d0 net/bluetooth/hci_sync.c:578 hci_cmd_sync_clear+0xac/0x100 net/bluetooth/hci_sync.c:593 hci_unregister_dev+0x188/0x600 net/bluetooth/hci_core.c:2767 vhci_release+0x7f/0x100 drivers/bluetooth/hci_vhci.c:674 __fput+0x270/0xb80 fs/file_table.c:422 task_work_run+0x14e/0x250 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa7d/0x2c10 kernel/exit.c:878 do_group_exit+0xd3/0x2a0 kernel/exit.c:1027 __do_sys_exit_group kernel/exit.c:1038 [inline] __se_sys_exit_group kernel/exit.c:1036 [inline] __ia32_sys_exit_group+0x3e/0x50 kernel/exit.c:1036 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf72e7579 Code: Unable to access opcode bytes at 0xf72e754f. RSP: 002b:00000000ffa973cc EFLAGS: 00000282 ORIG_RAX: 00000000000000fc RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000ffa974d0 RDX: 00000000f73130c7 RSI: 0000000000000000 RDI: 00000000f738e1b5 RBP: 00000000ffa97428 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> metapage_write_end_io: I/O error metapage_write_end_io: I/O error metapage_write_end_io: I/O error metapage_write_end_io: I/O error metapage_write_end_io: I/O error lbmIODone: I/O error in JFS log lbmIODone: I/O error in JFS log lbmIODone: I/O error in JFS log lmLogShutdown: exit(-5) jfs_umount failed with return code -5 --- 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. 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