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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: 302d, last: 15h50m
▶ ▼ 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 12 13h33m 233d 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 833 10d 740d 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 498d 498d 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 518d 518d 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 342d 342d 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 648d 668d 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: 	1-....: (1 GPs behind) idle=233/1/0x4000000000000000 softirq=13297/13298 fqs=5221 
	(t=10501 jiffies g=17537 q=1226)
NMI backtrace for cpu 1
CPU: 1 PID: 5492 Comm: syz.3.116 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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+0x22d/0x380 kernel/rcu/tree_stall.h:349
 print_cpu_stall+0x31f/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+0x6ec/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+0x4b0/0xb60 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x397/0x8b0 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:ieee80211_rx_h_sta_process net/mac80211/rx.c:-1 [inline]
RIP: 0010:ieee80211_rx_handlers+0x1657/0x8670 net/mac80211/rx.c:3941
Code: 00 00 10 00 48 21 de 31 ff e8 f5 a4 30 f8 b8 00 00 10 00 48 21 c3 0f 85 93 00 00 00 43 0f b6 44 25 00 84 c0 0f 85 fe 52 00 00 <48> 8b 5c 24 18 44 0f b7 33 44 89 f6 81 e6 00 04 00 00 31 ff e8 c0
RSP: 0018:ffffc90000dd05e0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88802be2d940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000dd07d0 R08: ffff88807dad0e5f R09: 1ffff1100fb5a1cb
R10: dffffc0000000000 R11: ffffed100fb5a1cc R12: dffffc0000000000
R13: 1ffff1100c06840a R14: ffff88807dad0e58 R15: ffff8880643a4000
 ieee80211_invoke_rx_handlers net/mac80211/rx.c:3994 [inline]
 ieee80211_prepare_and_rx_handle+0x2276/0x51d0 net/mac80211/rx.c:4708
 __ieee80211_rx_handle_packet net/mac80211/rx.c:4868 [inline]
 ieee80211_rx_list+0x1b35/0x25e0 net/mac80211/rx.c:4995
 ieee80211_rx_napi+0x17f/0x390 net/mac80211/rx.c:5018
 ieee80211_rx include/net/mac80211.h:4573 [inline]
 ieee80211_handle_queued_frames+0x104/0x1a0 net/mac80211/main.c:237
 tasklet_action_common+0x2ad/0x410 kernel/softirq.c:806
 handle_softirqs+0x336/0x830 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:__schedule+0x1/0x4350 kernel/sched/core.c:6274
Code: 5e 41 5f 5d e9 50 70 01 00 e8 cb 1f b7 f7 4c 89 ff 48 c7 c6 40 d3 07 8b e8 3c 02 ea f7 0f 0b 00 00 cc cc 00 00 cc cc 00 00 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 01 00
RSP: 0018:ffffc9000321fab0 EFLAGS: 00000282
RAX: 67dd915d3c847100 RBX: 0000000000000000 RCX: 67dd915d3c847100
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: 0000000000000001
RBP: ffffc9000321fb70 R08: ffffffff901cb1cf R09: 1ffffffff2039639
R10: dffffc0000000000 R11: fffffbfff203963a R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000643f58
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799
 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:__sanitizer_cov_trace_pc+0x50/0x60 kernel/kcov.c:213
Code: 16 00 00 00 74 2c 8b 91 10 16 00 00 83 fa 02 75 21 48 8b 91 18 16 00 00 48 8b 32 48 8d 7e 01 8b 89 14 16 00 00 48 39 cf 73 08 <48> 89 44 f2 08 48 89 3a c3 0f 1f 80 00 00 00 00 48 8b 04 24 65 48
RSP: 0018:ffffc9000321fc38 EFLAGS: 00000283
RAX: ffffffff8198e391 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9001325b000 RSI: 0000000000000733 RDI: 0000000000000734
RBP: ffffc9000321fd90 R08: ffffffff901cb1cf R09: 1ffffffff2039639
R10: dffffc0000000000 R11: fffffbfff203963a R12: dffffc0000000000
R13: 1ffff92000643f94 R14: ffffc9000321fcc0 R15: 0000000000000000
 perf_install_in_context+0x711/0x930 kernel/events/core.c:3016
 __do_sys_perf_event_open kernel/events/core.c:12793 [inline]
 __se_sys_perf_event_open+0x12b3/0x1bb0 kernel/events/core.c:12387
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f2ad8d41e59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2ad6f59028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f2ad8fbb180 RCX: 00007f2ad8d41e59
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000012c0
RBP: 00007f2ad8dd7e6f R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2ad8fbb218 R14: 00007f2ad8fbb180 R15: 00007ffe90bd9ee8
 </TASK>

Crashes (30):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/06/26 04:10 linux-5.15.y eceeec79dbc6 7ff32d8b .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
2026/06/14 12:08 linux-5.15.y dc027a595035 1d2f3589 .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
2026/05/27 09:02 linux-5.15.y 241d66fa280c 2b01f00e .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
2026/05/22 05:11 linux-5.15.y 93741761e5e3 70ae9b03 .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
2026/05/18 08:49 linux-5.15.y 93741761e5e3 de5aae85 .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
2026/04/27 16:55 linux-5.15.y b9d57c40a767 0f700595 .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
2026/04/19 18:18 linux-5.15.y b9d57c40a767 303e2802 .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
2026/04/16 05:59 linux-5.15.y 91d48252ad4b df15c5f3 .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
2026/03/08 17:16 linux-5.15.y 91d48252ad4b 5cb44a80 .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
2026/03/02 01:57 linux-5.15.y 3330a8d33e08 43249bac .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
2026/02/14 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.