INFO: rcu detected stall in vhci_rx

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-6.1	INFO: rcu detected stall in vhci_rx_loop				1	163d	163d	0/3	auto-obsoleted due to no activity on 2025/04/24 03:17

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...0: (1 GPs behind) idle=c234/1/0x4000000000000000 softirq=52325/52326 fqs=2074
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:        0          0            0
rcu: 	cputime:        0          0            0   ==> 52500(ms)
rcu: 	(detected by 0, t=10505 jiffies, g=54673, q=4127 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 13241 Comm: vhci_rx Not tainted 6.13.0-rc7-syzkaller-00043-g619f0b6fad52 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:check_preemption_disabled+0x2/0x120 lib/smp_processor_id.c:13
Code: b1 5f 8c 48 c7 c6 00 b2 5f 8c eb 1c 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 <41> 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24
RSP: 0018:ffffc90000a18af0 EFLAGS: 00000096
RAX: 0000000000000001 RBX: ffffc90000a18b60 RCX: ffff8880260364d8
RDX: dffffc0000000000 RSI: ffffffff8c0aaae0 RDI: ffffffff8c5fb220
RBP: ffffc90000a18c48 R08: ffffffff942a5a0f R09: 1ffffffff2854b41
R10: dffffc0000000000 R11: fffffbfff2854b42 R12: 1ffff92000143168
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000046
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c241c0e CR3: 0000000059e62000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
 lock_acquire+0x1fd/0x550 kernel/locking/lockdep.c:5851
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 advance_sched+0xab/0xca0 net/sched/sch_taprio.c:924
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x59d/0xd30 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: 8b 3d f4 f0 8e 0c 48 89 de 5b e9 33 fc 5a 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 00 d6 03 00 65 8b 15 80 53 64 7e 81 e2 00 01 ff 00
RSP: 0018:ffffc9001262f770 EFLAGS: 00000286
RAX: ffffffff814d4fe1 RBX: ffff888069ce55c0 RCX: 0000000000000000
RDX: 0000000000001000 RSI: 00000000000000f8 RDI: ffff888041d39000
RBP: 0000000000000000 R08: 0000000000000003 R09: ffff888041d39000
R10: 0000000000000002 R11: ffff888026035a00 R12: fffff520027fff01
R13: ffff888069ce55c0 R14: ffff888041d39000 R15: fffff520026b8000
 __phys_addr+0x11/0x170 arch/x86/mm/physaddr.c:16
 kasan_populate_vmalloc_pte+0x5a/0xe0 mm/kasan/shadow.c:309
 apply_to_pte_range mm/memory.c:2831 [inline]
 apply_to_pmd_range mm/memory.c:2875 [inline]
 apply_to_pud_range mm/memory.c:2911 [inline]
 apply_to_p4d_range mm/memory.c:2947 [inline]
 __apply_to_page_range+0x808/0xde0 mm/memory.c:2981
 alloc_vmap_area+0x1d4e/0x2400 mm/vmalloc.c:2035
 __get_vm_area_node+0x1c8/0x2d0 mm/vmalloc.c:3137
 __vmalloc_node_range_noprof+0x344/0x1380 mm/vmalloc.c:3806
 __vmalloc_node_noprof mm/vmalloc.c:3911 [inline]
 vmalloc_noprof+0x79/0x90 mm/vmalloc.c:3944
 kcov_remote_start+0x322/0x7d0 kernel/kcov.c:916
 kcov_remote_start_common include/linux/kcov.h:50 [inline]
 usbip_kcov_remote_start drivers/usb/usbip/usbip_common.h:351 [inline]
 vhci_rx_loop+0x190/0x1070 drivers/usb/usbip/vhci_rx.c:264
 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
2025/01/15 12:37	upstream	619f0b6fad52	7315a7cf	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-root	INFO: rcu detected stall in vhci_rx_loop
2024/12/28 00:38	upstream	8379578b11d5	d3ccff63	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-smack-root	INFO: rcu detected stall in vhci_rx_loop