rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=031/1/0x4000000000000000 softirq=49830/49831 fqs=5227
(t=10501 jiffies g=67917 q=3366)
NMI backtrace for cpu 0
CPU: 0 PID: 18187 Comm: syz.8.2777 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
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:224 [inline]
RIP: 0010:ieee80211_queue_skb_to_iface net/mac80211/rx.c:232 [inline]
RIP: 0010:ieee80211_rx_h_mgmt+0x44e/0x5f0 net/mac80211/rx.c:3802
Code: 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 c9 db 6d f8 49 8b 3f 48 81 c3 40 0b 00 00 48 89 de e8 57 a6 dc ff 4d 85 f6 74 27 ed a7 28 f8 49 81 c6 f0 04 00 00 4c 89 f0 48 c1 e8 03 42 80 3c
RSP: 0018:ffffc900000075a0 EFLAGS: 00000286
RAX: 0000000000000001 RBX: ffff88807d98d7c0 RCX: ffff88806370d940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000007 R08: ffffffff901f11cf R09: 1ffffffff203e239
R10: dffffc0000000000 R11: fffffbfff203e23a R12: dffffc0000000000
R13: ffff88802a7a6850 R14: ffff88802b008000 R15: ffff888031ac0e40
ieee80211_rx_handlers+0x68f3/0x8670 net/mac80211/rx.c:3966
ieee80211_invoke_rx_handlers net/mac80211/rx.c:3996 [inline]
ieee80211_prepare_and_rx_handle+0x2276/0x51d0 net/mac80211/rx.c:4710
__ieee80211_rx_handle_packet net/mac80211/rx.c:4870 [inline]
ieee80211_rx_list+0x1b35/0x25e0 net/mac80211/rx.c:4997
ieee80211_rx_napi+0x17f/0x390 net/mac80211/rx.c:5020
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
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 15 d7 88 f7 e8 80 bf b5 f7 fb bf 01 00 00 00 d5 b5 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc90003adf600 EFLAGS: 00000286
RAX: b495285f551a9100 RBX: 0000000000000000 RCX: b495285f551a9100
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: 0000000000000001
RBP: ffffc90003adf6b0 R08: ffffffff901f10cf R09: 1ffffffff203e219
R10: dffffc0000000000 R11: fffffbfff203e21a R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200075bec0
irqentry_exit+0x63/0x70 kernel/entry/common.c:435
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:debug_lockdep_rcu_enabled+0x9/0x30 kernel/rcu/update.c:280
Code: 80 2a 2b 8a 48 c7 c6 00 4f 2b 8a e8 41 0f f5 ff 0f 0b eb d1 00 00 cc cc 00 00 cc cc 00 00 cc cc 00 31 c0 83 3d 5b e5 c9 03 00 <74> 1d 83 3d d2 17 ca 03 00 74 14 65 48 8b 0d 04 35 41 76 31 c0 83
RSP: 0018:ffffc90003adf778 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 00000000000547aa RCX: ffff88806370d940
RDX: 0000000000000002 RSI: 00000000000547aa RDI: 00000000000547aa
RBP: ffffc90003adf870 R08: dffffc0000000000 R09: 1ffffffff203e218
R10: dffffc0000000000 R11: fffffbfff203e219 R12: dffffc0000000000
R13: dffffc0000000000 R14: 00000000000547aa R15: ffffffff8d629f68
rcu_read_unlock include/linux/rcupdate.h:769 [inline]
inet_twsk_purge+0x6f6/0x820 net/ipv4/inet_timewait_sock.c:309
ops_exit_list net/core/net_namespace.c:177 [inline]
setup_net+0x842/0xa10 net/core/net_namespace.c:365
copy_net_ns+0x33e/0x5b0 net/core/net_namespace.c:503
create_new_namespaces+0x3ce/0x700 kernel/nsproxy.c:110
copy_namespaces+0x378/0x3d0 kernel/nsproxy.c:178
copy_process+0x17f0/0x3e70 kernel/fork.c:2295
kernel_clone+0x23f/0x990 kernel/fork.c:2682
__do_sys_clone kernel/fork.c:2799 [inline]
__se_sys_clone kernel/fork.c:2783 [inline]
__x64_sys_clone+0x19a/0x210 kernel/fork.c:2783
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: 0033:0x7fba9a5bb159
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:00007fba98812fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fba9a842fa0 RCX: 00007fba9a5bb159
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040100000
RBP: 00007fba9a65206b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fba9a843038 R14: 00007fba9a842fa0 R15: 00007ffdaddc1f48