rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10461 ticks this GP) idle=2c64/1/0x4000000000000000 softirq=19820/19871 fqs=4585
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1120963          0            0
rcu: 	cputime:    20306      32183           36   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=21653 q=1256 ncpus=2)
CPU: 1 PID: 7503 Comm: syz.2.544 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:kcov_remote_stop+0x28/0x6e0 kernel/kcov.c:1057
Code: eb 8c f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 38 65 4c 8b 35 b6 8f 7c 7e 65 8b 05 b7 8f 7c 7e a9 00 00 ff 00 74 0f <48> 83 c4 38 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00
RSP: 0018:ffffc900001f0970 EFLAGS: 00000206
RAX: c95ee4ab15172c00 RBX: dffffc0000000000 RCX: c95ee4ab15172c00
RDX: dffffc0000000000 RSI: ffffffff8acac900 RDI: ffffffff8b1c82e0
RBP: ffffc900001f0c30 R08: ffffffff8e8adeaf R09: 1ffffffff1d15bd5
R10: dffffc0000000000 R11: fffffbfff1d15bd6 R12: 0000000000000246
R13: ffffffff81872663 R14: ffff888023c80000 R15: ffff8880b8f2c2f8
FS:  00007f57118cb6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f11870c1b55 CR3: 000000007f1bd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ieee80211_rx_list+0x29ac/0x32d0 net/mac80211/rx.c:5440
 ieee80211_rx_napi+0x1b2/0x3d0 net/mac80211/rx.c:5460
 ieee80211_rx include/net/mac80211.h:4971 [inline]
 ieee80211_handle_queued_frames+0x106/0x1a0 net/mac80211/main.c:319
 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:preempt_schedule_irq+0xba/0x150 kernel/sched/core.c:7010
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 6f bf 01 00 00 00 e8 61 cb cf f6 e8 ec d2 00 f7 fb bf 01 00 00 00 <e8> f1 b4 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc90004a0f840 EFLAGS: 00000286
RAX: c95ee4ab15172c00 RBX: 0000000000000000 RCX: c95ee4ab15172c00
RDX: dffffc0000000000 RSI: ffffffff8acac900 RDI: 0000000000000001
RBP: ffffc90004a0f8e0 R08: ffffffff8e8adeaf R09: 1ffffffff1d15bd5
R10: dffffc0000000000 R11: fffffbfff1d15bd6 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000941f08
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:lock_acquire+0x208/0x420 kernel/locking/lockdep.c:5758
Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3c 04 f8 0f 85 f0 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 43 c7 44 3c 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc90004a0f9a0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: c95ee4ab15172c00
RDX: 0000000000000000 RSI: ffffffff8acada80 RDI: ffffffff8b1c82e0
RBP: ffffc90004a0faa8 R08: dffffc0000000000 R09: 1ffffffff2237ea0
R10: dffffc0000000000 R11: fffffbfff2237ea1 R12: 1ffff92000941f40
R13: ffffffff8d131fa0 R14: 0000000000000246 R15: dffffc0000000000
 rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 rcu_read_lock include/linux/rcupdate.h:786 [inline]
 sched_mm_cid_remote_clear_old kernel/sched/core.c:11936 [inline]
 task_mm_cid_work+0x33a/0x770 kernel/sched/core.c:11997
 task_work_run+0x1d4/0x260 kernel/task_work.c:245
 get_signal+0x1235/0x13f0 kernel/signal.c:2678
 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: 0033:0x7f571099c629
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:00007f57118cb028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 000000000000000a RBX: 00007f5710c15fa0 RCX: 00007f571099c629
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007f5710a32b39 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5710c16038 R14: 00007f5710c15fa0 R15: 00007ffcea908668
 </TASK>