rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (4245 ticks this GP) idle=17f4/1/0x4000000000000000 softirq=52377/52377 fqs=2737
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1098053          3            0
rcu: 	cputime:    15559      26879           26   ==> 42450(ms)
rcu: 	(t=10502 jiffies g=63669 q=2577 ncpus=2)
CPU: 1 PID: 15768 Comm: syz.1.2773 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 66 88 7c 7e 65 8b 05 67 88 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: 828c621ddbf90800 RBX: dffffc0000000000 RCX: 828c621ddbf90800
RDX: dffffc0000000000 RSI: ffffffff8acac960 RDI: ffffffff8b1c85a0
RBP: ffffc900001f0c30 R08: ffffffff8e8aeeef R09: 1ffffffff1d15ddd
R10: dffffc0000000000 R11: fffffbfff1d15dde R12: 0000000000000246
R13: ffffffff81872db3 R14: ffff888036080000 R15: ffff8880b8f2c2f8
FS:  00007ff293d976c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000001 CR3: 0000000068481000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000080 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 51 2b cf f6 e8 7c 32 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:ffffc9000c92fbe0 EFLAGS: 00000282
RAX: 828c621ddbf90800 RBX: 0000000000000000 RCX: 828c621ddbf90800
RDX: dffffc0000000000 RSI: ffffffff8acac960 RDI: 0000000000000001
RBP: ffffc9000c92fc80 R08: ffffffff8e8aeeef R09: 1ffffffff1d15ddd
R10: dffffc0000000000 R11: fffffbfff1d15dde R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001925f7c
 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:do_futex+0x3b5/0x3e0 kernel/futex/syscalls.c:163
Code: 00 00 00 fc ff df 48 c7 44 24 40 0e 36 e0 45 4a c7 04 3b 00 00 00 00 65 48 8b 0c 25 28 00 00 00 48 3b 8c 24 80 00 00 00 75 1d <48> 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 b7 ca 0b 00 48 c7
RSP: 0018:ffffc9000c92fd40 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff92001925fb0 RCX: 828c621ddbf90800
RDX: ffffc9000dc1d000 RSI: 0000000000000003 RDI: 0000000000000004
RBP: ffffc9000c92fe08 R08: ffffffff8e8aeeef R09: 1ffffffff1d15ddd
R10: dffffc0000000000 R11: fffffbfff1d15dde R12: 0000000000000000
R13: ffffc9000c92fda0 R14: 0000000000000000 R15: dffffc0000000000
 __do_sys_futex kernel/futex/syscalls.c:211 [inline]
 __se_sys_futex+0x3a9/0x440 kernel/futex/syscalls.c:192
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff292f9c799
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:00007ff293d970e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007ff293216098 RCX: 00007ff292f9c799
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff293216098
RBP: 00007ff293216090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff293216128 R14: 00007ffcdf03f7e0 R15: 00007ffcdf03f8c8
 </TASK>