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: 347d, last: 18h36m
▶ ▼ 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 syz, C inconclusive 14 26d 279d 0/3 upstream: reported C repro on 2025/11/04 22:16
upstream INFO: rcu detected stall in ieee80211_handle_queued_frames wireless 1 syz, C error 836 5d04h 786d 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 543d 543d 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 564d 564d 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 387d 387d 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 694d 714d 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=589/1/0x4000000000000000 softirq=74983/74984 fqs=4668 
	(t=10500 jiffies g=107597 q=9049)
NMI backtrace for cpu 0
CPU: 0 PID: 24607 Comm: syz.2.3961 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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+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_queue_skb_to_iface net/mac80211/rx.c:222 [inline]
RIP: 0010:ieee80211_queue_skb_to_iface net/mac80211/rx.c:232 [inline]
RIP: 0010:ieee80211_rx_h_mgmt+0x41d/0x5f0 net/mac80211/rx.c:3800
Code: 00 00 4c 89 fe e8 43 c1 91 fe 4c 8d bb 08 06 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 d6 a1 6e f8 4d 8b 3f <49> 83 c7 40 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8
RSP: 0018:ffffc900000075a0 EFLAGS: 00000246
RAX: 1ffff1100bb05a51 RBX: ffff88805d82cc80 RCX: 0000000000000300
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: 00000000ffffffff
RBP: 0000000000000007 R08: ffffffff901ee1c7 R09: 1ffffffff203dc38
R10: dffffc0000000000 R11: fffffbfff203dc39 R12: dffffc0000000000
R13: ffff888079cda850 R14: ffff888077e0c000 R15: ffff88805c328e00
 ieee80211_rx_handlers+0x68f3/0x8670 net/mac80211/rx.c:3964
 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: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 f5 e6 89 f7 e8 10 c3 b6 f7 fb bf 01 00 00 00 <e8> d5 b5 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc9000316ea60 EFLAGS: 00000286
RAX: 59baceb4101d6900 RBX: 0000000000000000 RCX: 59baceb4101d6900
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: 0000000000000001
RBP: ffffc9000316eb00 R08: ffff8880b903b30b R09: 1ffff11017207661
R10: dffffc0000000000 R11: ffffed1017207662 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200062dd4c
 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:preempt_schedule_common+0xc4/0xd0 kernel/sched/core.c:6580
Code: df be 08 00 00 00 e8 fb c3 f5 f7 48 89 d8 48 c1 e8 03 42 80 3c 38 00 0f 84 5a ff ff ff 48 89 df e8 51 c2 f5 f7 e9 4d ff ff ff <5b> 41 5e 41 5f c3 66 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 53 48
RSP: 0018:ffffc9000316ebc0 EFLAGS: 00000246
RAX: 1ffff1100ce7a770 RBX: ffff8880673d3b80 RCX: ffffffff89c85d05
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8880673d3b80
RBP: ffffc9000316ec68 R08: ffff8880673d3b87 R09: 1ffff1100ce7a770
R10: dffffc0000000000 R11: ffffed100ce7a771 R12: ffffc90003168000
R13: dffffc0000000000 R14: ffff8880673d5068 R15: dffffc0000000000
 preempt_schedule+0xbc/0xd0 kernel/sched/core.c:6596
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
 unwind_next_frame+0x1202/0x1cf0 arch/x86/kernel/unwind_orc.c:616
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1710 [inline]
 slab_free_freelist_hook+0xec/0x170 mm/slub.c:1736
 slab_free mm/slub.c:3504 [inline]
 kfree+0xef/0x2a0 mm/slub.c:4564
 free_func_state kernel/bpf/verifier.c:913 [inline]
 free_verifier_state+0xd5/0x230 kernel/bpf/verifier.c:930
 pop_stack+0x387/0x4f0 kernel/bpf/verifier.c:1032
 do_check+0x8d24/0xefc0 kernel/bpf/verifier.c:11492
 do_check_common+0xe7f/0x16e0 kernel/bpf/verifier.c:13516
 do_check_main kernel/bpf/verifier.c:13579 [inline]
 bpf_check+0x88c1/0xf6b0 kernel/bpf/verifier.c:14150
 bpf_prog_load+0xfdf/0x14e0 kernel/bpf/syscall.c:2354
 __sys_bpf+0x532/0x6f0 kernel/bpf/syscall.c:4657
 __do_sys_bpf kernel/bpf/syscall.c:4761 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4759 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759
 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: 0033:0x7f48011630d9
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:00007f47ff3bb028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f48013eafa0 RCX: 00007f48011630d9
RDX: 0000000000000048 RSI: 00002000000017c0 RDI: 0000000000000005
RBP: 00007f48011fa024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f48013eb038 R14: 00007f48013eafa0 R15: 00007ffcc9d243a8
 </TASK>

Crashes (39):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/10 13:54 linux-5.15.y aabd761612db 5d63f80b .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
2026/07/25 16:00 linux-5.15.y 674f684f7c61 492bab15 .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
2026/07/11 19:18 linux-5.15.y c86c4726e7f0 d78ea535 .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
2026/07/09 20:39 linux-5.15.y c86c4726e7f0 a0c310a3 .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
2026/07/04 17:18 linux-5.15.y c86c4726e7f0 fcece630 .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
2026/06/30 09:13 linux-5.15.y eceeec79dbc6 fff8d0a0 .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
2026/06/28 04:14 linux-5.15.y eceeec79dbc6 fb92f11c .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
2026/06/26 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
2026/08/02 13:15 linux-5.15.y 6e2fd6534337 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf BUG: soft lockup in ieee80211_handle_queued_frames
2026/07/09 05:41 linux-5.15.y c86c4726e7f0 b9f1ceaa .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf BUG: soft lockup in ieee80211_handle_queued_frames
* Struck through repros no longer work on HEAD.