INFO: rcu detected stall in usb_disable_device

Status: auto-obsoleted due to no activity on 2026/10/02 14:50
Subsystems: kernfs
Labels: prio:high
[Documentation on labels]
First crash: 98d, last: 98d
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ID Workflow Result Correct Bug Created Started Finished Revision
81538fde assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ INFO: rcu detected stall in usb_disable_device 2026/07/06 00:03 2026/07/06 00:03 2026/07/06 00:36 93f57954

Sample crash report:
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=113393, q=1119 ncpus=2)
task:kworker/0:2     state:R  running task     stack:21128 pid:119   tgid:119   ppid:2      task_flags:0x4288060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__rcu_read_unlock+0x8/0x5e0 kernel/rcu/tree_plugin.h:431
RSP: 0018:ffffc9000164f5c8 EFLAGS: 00000292
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc9000164f5a4
RDX: 0000000000000006 RSI: ffffffff890cd08b RDI: ffffffff87b15200
RBP: ffff888100e87800 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88811eca24b0
 rcu_read_unlock include/linux/rcupdate.h:873 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1183 [inline]
 kernfs_root+0xf8/0x2a0 fs/kernfs/kernfs-internal.h:76
 kernfs_active+0xb6/0x110 fs/kernfs/dir.c:40
 kernfs_remove_by_name_ns+0x7c/0x120 fs/kernfs/dir.c:1797
 device_del+0x180/0x9b0 drivers/base/core.c:3936
 usb_remove_ep_devs+0x42/0x90 drivers/usb/core/endpoint.c:181
 remove_intf_ep_devs drivers/usb/core/message.c:1326 [inline]
 usb_disable_device+0x319/0x810 drivers/usb/core/message.c:1477
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
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yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/04 14:45 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing dc59e4fea9d8 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb INFO: rcu detected stall in usb_disable_device
* Struck through repros no longer work on HEAD.