rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10465 ticks this GP) idle=6e84/1/0x4000000000000000 softirq=60791/60868 fqs=4482
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1414906        181            0
rcu: 	cputime:    24447      28041           40   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=73013 q=819 ncpus=2)
CPU: 0 PID: 15685 Comm: syz.3.2786 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x60 kernel/kcov.c:216
Code: 48 8b 3d dc f9 03 0d 48 89 de 5b e9 d3 67 57 00 cc cc cc f3 0f 1e fa 48 8b 04 24 65 48 8b 0d b0 93 7c 7e 65 8b 15 b1 93 7c 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00
RSP: 0018:ffffc90000007cf0 EFLAGS: 00000286
RAX: ffffffff89f39027 RBX: 0000000000000000 RCX: ffff8880250e9e00
RDX: 0000000000000101 RSI: ffffffff8acac9e0 RDI: 00000000ffffffff
RBP: 0000000000000001 R08: ffffffff8e8b19af R09: 1ffffffff1d16335
R10: dffffc0000000000 R11: fffffbfff1d16336 R12: ffff888043a803c0
R13: 1ffff11010654150 R14: ffff8880832a0a80 R15: ffff8880831d9610
FS:  00007fd5b89866c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe181aff32 CR3: 000000008590e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000008d24
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ieee80211_handle_queued_frames+0x67/0x1a0 net/mac80211/main.c:312
 tasklet_action_common+0x302/0x4d0 kernel/softirq.c:809
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:mmdrop include/linux/sched/mm.h:53 [inline]
RIP: 0010:mmdrop_sched include/linux/sched/mm.h:82 [inline]
RIP: 0010:mmdrop_lazy_tlb_sched include/linux/sched/mm.h:109 [inline]
RIP: 0010:finish_task_switch+0x32a/0x8f0 kernel/sched/core.c:5280
Code: 42 0f b6 04 28 84 c0 0f 85 a6 02 00 00 f7 03 20 00 00 00 0f 85 93 01 00 00 4c 89 ff be 04 00 00 00 e8 da ef 81 00 f0 41 ff 0f <0f> 84 a4 00 00 00 81 7d a8 80 00 00 00 0f 84 ac 00 00 00 48 83 c4
RSP: 0018:ffffc90004e2f5b8 EFLAGS: 00000202
RAX: 1ffff11004a1d401 RBX: ffff8880250eb458 RCX: ffffffff815d6b36
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888017c6a600
RBP: ffffc90004e2f610 R08: ffff888017c6a603 R09: 1ffff11002f8d4c0
R10: dffffc0000000000 R11: ffffed1002f8d4c1 R12: ffff8880250ea340
R13: dffffc0000000000 R14: ffff8880186e5a00 R15: ffff888017c6a600
 context_switch kernel/sched/core.c:5384 [inline]
 __schedule+0x155b/0x45a0 kernel/sched/core.c:6700
 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867
 preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
 _raw_spin_unlock_irq+0x40/0x50 kernel/locking/spinlock.c:202
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 acct_collect+0x5db/0x790 kernel/acct.c:624
 do_exit+0x863/0x2460 kernel/exit.c:853
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
 get_signal+0x12fc/0x13f0 kernel/signal.c:2902
 arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd5b7b9cdd9
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:00007fd5b8986028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 00000000000000cc RBX: 00007fd5b7e16090 RCX: 00007fd5b7b9cdd9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007fd5b7c32d69 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd5b7e16128 R14: 00007fd5b7e16090 R15: 00007ffd7348dfa8
 </TASK>