BUG: workqueue leaked atomic, lock or RCU: ksoftirqd/NUM[NUM] (2)

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision
90128335	assessment-security	DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	BUG: workqueue leaked atomic, lock or RCU: ksoftirqd/NUM[NUM] (2)	2026/09/07 00:01	2026/09/07 00:01	2026/09/07 00:25	4f7b22a0

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	BUG: workqueue leaked atomic, lock or RCU: ksoftirqd/NUM[NUM] kernel	-1				1	359d	355d	0/29	auto-obsoleted due to no activity on 2025/12/14 03:11

Rank 🛈

upstream

-1

359d

355d

0/29

BUG: workqueue leaked atomic, lock or RCU: ksoftirqd/0[15] preempt=0x00000000 lock=4->0 RCU=2->2 workfn=usb_giveback_urb_bh INFO: lockdep is turned off. CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: <TASK> dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 process_one_work kernel/workqueue.c:3417 [inline] process_scheduled_works+0x12c7/0x1630 kernel/workqueue.c:3479 bh_worker+0x47f/0x8e0 kernel/workqueue.c:3782 tasklet_action+0xc/0x70 kernel/softirq.c:997 handle_softirqs+0x1da/0x6d0 kernel/softirq.c:645 run_ksoftirqd+0x53/0x190 kernel/softirq.c:1108 smpboot_thread_fn+0x565/0xa70 kernel/smpboot.c:160 kthread+0x38b/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK>

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/09/05 05:47	upstream	654ae5d73c05	4f7b22a0	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-smack-root	BUG: workqueue leaked atomic, lock or RCU: ksoftirqd/NUM[NUM]

Crashes (1):