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INFO: rcu detected stall in ieee80211_handle_queued_frames (2)

Status: upstream: reported on 2025/08/28 08:46
Reported-by: syzbot+8b9640939d074b93a16b@syzkaller.appspotmail.com
First crash: 170d, last: 17h10m
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 INFO: rcu detected stall in ieee80211_handle_queued_frames (3) origin:lts-only 1 C inconclusive 6 73d 102d 0/3 upstream: reported C repro on 2025/11/04 22:16
upstream INFO: rcu detected stall in ieee80211_handle_queued_frames wireless 1 C error 772 5h57m 609d 0/29 upstream: reported C repro on 2024/06/15 21:07
linux-5.15 INFO: rcu detected stall in ieee80211_handle_queued_frames 1 1 366d 366d 0/3 auto-obsoleted due to no activity on 2025/05/24 12:07
linux-6.1 INFO: rcu detected stall in ieee80211_handle_queued_frames (2) 1 1 386d 386d 0/3 auto-obsoleted due to no activity on 2025/05/04 02:50
linux-6.6 INFO: rcu detected stall in ieee80211_handle_queued_frames 1 1 210d 210d 0/2 auto-obsoleted due to no activity on 2025/10/27 16:58
linux-6.1 INFO: rcu detected stall in ieee80211_handle_queued_frames 1 4 517d 537d 0/3 auto-obsoleted due to no activity on 2024/12/24 22:17

Sample crash report:
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=f57/1/0x4000000000000000 softirq=74897/74898 fqs=5234 
	(t=10502 jiffies g=110569 q=1754)
NMI backtrace for cpu 0
CPU: 0 PID: 25474 Comm: syz.8.5605 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x22f/0x380 kernel/rcu/tree_stall.h:349
 print_cpu_stall+0x31d/0x5f0 kernel/rcu/tree_stall.h:633
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3936 [inline]
 rcu_sched_clock_irq+0x6ea/0x1120 kernel/rcu/tree.c:2619
 update_process_times+0x193/0x200 kernel/time/timer.c:2021
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4ad/0xb70 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1108
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:194
Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 2f da 8c f7 65 8b 05 d0 e7 3c 76 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0000:ffffc90000007520 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a06 RCX: d3847db33853a100
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: 0000000000000001
RBP: ffffc900000075a0 R08: ffffffff901d21c7 R09: 1ffffffff203a438
R10: dffffc0000000000 R11: fffffbfff203a439 R12: dffffc0000000000
R13: ffff888060127c50 R14: ffff88806004d7f0 R15: 1ffff92000000ea4
 __ieee80211_queue_skb_to_iface net/mac80211/rx.c:221 [inline]
 ieee80211_queue_skb_to_iface net/mac80211/rx.c:232 [inline]
 ieee80211_rx_h_mgmt+0x3f8/0x5f0 net/mac80211/rx.c:3800
 ieee80211_rx_handlers+0x66ff/0x84c0 net/mac80211/rx.c:3964
 ieee80211_invoke_rx_handlers net/mac80211/rx.c:3994 [inline]
 ieee80211_prepare_and_rx_handle+0x1d90/0x52f0 net/mac80211/rx.c:4708
 __ieee80211_rx_handle_packet net/mac80211/rx.c:4868 [inline]
 ieee80211_rx_list+0x1c78/0x2790 net/mac80211/rx.c:4995
 ieee80211_rx_napi+0x178/0x390 net/mac80211/rx.c:5018
 ieee80211_rx include/net/mac80211.h:4573 [inline]
 ieee80211_handle_queued_frames+0x105/0x1b0 net/mac80211/main.c:237
 tasklet_action_common+0x2ad/0x410 kernel/softirq.c:806
 handle_softirqs+0x339/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:preempt_schedule_irq+0xb6/0x160 kernel/sched/core.c:6799
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 7f bf 01 00 00 00 e8 85 fe 8d f7 e8 f0 eb ba f7 fb bf 01 00 00 00 <e8> 65 b5 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0000:ffffc9000376f5c0 EFLAGS: 00000282
RAX: d3847db33853a100 RBX: 0000000000000000 RCX: d3847db33853a100
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: 0000000000000001
RBP: ffffc9000376f660 R08: ffffffff901d20f7 R09: 1ffffffff203a41e
R10: dffffc0000000000 R11: fffffbfff203a41f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920006edeb8
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__nr_to_section include/linux/mmzone.h:1383 [inline]
RIP: 0010:__pfn_to_section include/linux/mmzone.h:1468 [inline]
RIP: 0010:lookup_page_ext+0x8a/0x120 mm/page_ext.c:209
Code: 33 96 e8 79 4c f8 ff 48 8b 05 d2 39 6d 14 48 85 c0 74 42 48 89 d9 48 c1 e9 16 4c 8d 34 c8 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 4c 4c f8 ff 4d 8b 36 4d 85 f6 74 20 49 89 dc 49
RSP: 0000:ffffc9000376f728 EFLAGS: 00000246
RAX: 1ffff11047ffe000 RBX: 00000000000300e4 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 00000000000300e4 RDI: 00000003ffffffff
RBP: 0000000000000000 R08: ffffea0000c03937 R09: ffffed100601c800
R10: dffffc0000000000 R11: fffff94000180727 R12: 0000000001100cca
R13: 0000000000000000 R14: ffff88823fff0000 R15: dffffc0000000000
 __set_page_owner+0x23/0x2d0 mm/page_owner.c:175
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192
 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5487
 alloc_pages_vma+0x393/0x7c0 mm/mempolicy.c:2146
 wp_page_copy+0x24b/0x2050 mm/memory.c:3056
 handle_pte_fault mm/memory.c:4668 [inline]
 __handle_mm_fault mm/memory.c:4785 [inline]
 handle_mm_fault+0x1f06/0x4410 mm/memory.c:4883
 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1355
 handle_page_fault arch/x86/mm/fault.c:1443 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1496
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7f589b03356f
Code: 3d 88 31 ee 00 00 0f b6 35 7e 31 ee 00 75 0e 80 3d 79 31 ee 00 00 75 05 40 84 f6 74 0a 31 d2 4c 89 ef e8 94 f3 fe ff 48 89 ef <e8> 2c fa ff ff 8b 45 0c 85 c0 75 26 48 8d 75 0c b9 40 42 0f 00 ba
RSP: 002b:00007f58993c70f0 EFLAGS: 00010246
RAX: 0000000000000001 RBX: 00007f589b3e6fa8 RCX: 00007f589b16cf79
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f589b3e6fa0
RBP: 00007f589b3e6fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f589b3e7038 R14: 00007ffc7660d7c0 R15: 00007ffc7660d8a8
 </TASK>

Crashes (20):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/02/14 05:50 linux-5.15.y e45d5d41c134 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2026/01/31 17:07 linux-5.15.y 9eec9a14ee10 afc0c4d4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2026/01/31 07:21 linux-5.15.y 9eec9a14ee10 c75a2f6e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/12/22 07:32 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/12/21 22:54 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/12/21 17:53 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/12/18 16:30 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/12/17 05:34 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/12/13 20:37 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/12/13 12:45 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/12/11 22:39 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/12/10 20:12 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/12/01 11:08 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/11/29 00:57 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/11/21 18:09 linux-5.15.y cc5ec8769306 280ea308 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/11/15 00:07 linux-5.15.y cc5ec8769306 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/10/11 17:33 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/10/05 20:40 linux-5.15.y 29e53a5b1c4f 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/09/13 21:40 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
2025/08/28 08:46 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in ieee80211_handle_queued_frames
* Struck through repros no longer work on HEAD.