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[syzbot] [bluetooth?] possible deadlock in touch_wq_lockdep_map (2) | 0 (1) | 2024/10/11 09:06 |
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[syzbot] [bluetooth?] possible deadlock in touch_wq_lockdep_map (2) | 0 (1) | 2024/10/11 09:06 |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | possible deadlock in touch_wq_lockdep_map usb | C | 1208 | 43d | 239d | 28/28 | fixed on 2024/10/03 15:25 |
Bluetooth: hci1: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci1: Injecting HCI hardware error event Bluetooth: hci1: hardware error 0x00 ============================================ WARNING: possible recursive locking detected 6.12.0-rc2-syzkaller-00058-g75b607fab38d #0 Not tainted -------------------------------------------- kworker/u9:1/9530 is trying to acquire lock: ffff888037f87148 ((wq_completion)hci1){+.+.}-{0:0}, at: touch_wq_lockdep_map+0xb1/0x170 kernel/workqueue.c:3880 but task is already holding lock: ffff888037f87148 ((wq_completion)hci1){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] ffff888037f87148 ((wq_completion)hci1){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock((wq_completion)hci1); lock((wq_completion)hci1); *** DEADLOCK *** May be due to missing lock nesting notation 2 locks held by kworker/u9:1/9530: #0: ffff888037f87148 ((wq_completion)hci1){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff888037f87148 ((wq_completion)hci1){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc900043e7d00 ((work_completion)(&hdev->error_reset)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc900043e7d00 ((work_completion)(&hdev->error_reset)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 stack backtrace: CPU: 0 UID: 0 PID: 9530 Comm: kworker/u9:1 Not tainted 6.12.0-rc2-syzkaller-00058-g75b607fab38d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: hci1 hci_error_reset Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3037 check_deadlock kernel/locking/lockdep.c:3089 [inline] validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3891 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 touch_wq_lockdep_map+0xc7/0x170 kernel/workqueue.c:3880 __flush_workqueue+0x14f/0x1600 kernel/workqueue.c:3922 drain_workqueue+0xc9/0x3a0 kernel/workqueue.c:4086 destroy_workqueue+0xba/0xc40 kernel/workqueue.c:5830 hci_release_dev+0x169/0x16b0 net/bluetooth/hci_core.c:2733 bt_host_release+0x83/0x90 net/bluetooth/hci_sysfs.c:94 device_release+0x9b/0x1c0 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x231/0x480 lib/kobject.c:737 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/10/09 22:32 | upstream | 75b607fab38d | 0278d004 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | possible deadlock in touch_wq_lockdep_map | ||
2024/10/21 07:24 | upstream | db87114dcf13 | cd6fc0a3 | .config | console log | report | info | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-qemu-upstream | possible deadlock in touch_wq_lockdep_map | ||
2024/10/07 11:35 | upstream | 8cf0b93919e1 | d7906eff | .config | console log | report | info | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-qemu-upstream | possible deadlock in touch_wq_lockdep_map | ||
2024/10/13 14:15 | upstream | 36c254515dc6 | 084d8178 | .config | console log | report | info | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-qemu-upstream-386 | possible deadlock in touch_wq_lockdep_map | ||
2024/10/07 08:59 | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci | 80cb3fb61135 | d7906eff | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-gce-arm64 | possible deadlock in touch_wq_lockdep_map |