rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P4515 P4511 0-.... } 2629 jiffies s: 1629 root: 0x1/T
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4515 Comm: syz.2.52 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:mark_lock+0xf6/0x320 kernel/locking/lockdep.c:4652
Code: 00 74 36 45 31 ff 49 83 c7 50 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 b4 ac 6e 00 b8 01 00 00 00 45 85 27 74 50 <48> 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 66 fa ad 02 85 c0
RSP: 0018:ffffc90000006e80 EFLAGS: 00000006
RAX: 0000000000000001 RBX: ffff88802f8b1e00 RCX: ffffffff8164b3c4
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90b12240
RBP: 0000000000000009 R08: ffffffff90b12247 R09: 1ffffffff2162448
R10: dffffc0000000000 R11: fffffbfff2162449 R12: 0000000000000200
R13: dffffc0000000000 R14: ffff88802f8b2980 R15: ffffffff9049c310
FS:  00007f7f5e4716c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000001ef34000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 mark_usage kernel/locking/lockdep.c:4554 [inline]
 __lock_acquire+0xdf7/0x7c40 kernel/locking/lockdep.c:5017
 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676
 rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 rcu_read_lock include/linux/rcupdate.h:791 [inline]
 __perf_event_output kernel/events/core.c:7728 [inline]
 perf_event_output_forward+0xdf/0x2f0 kernel/events/core.c:7750
 __perf_event_overflow+0x457/0x630 kernel/events/core.c:9496
 perf_event_overflow kernel/events/core.c:9517 [inline]
 perf_swevent_hrtimer+0x472/0x630 kernel/events/core.c:10967
 __run_hrtimer kernel/time/hrtimer.c:1751 [inline]
 __hrtimer_run_queues+0x4e7/0xc90 kernel/time/hrtimer.c:1815
 hrtimer_interrupt+0x399/0x980 kernel/time/hrtimer.c:1877
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:kcov_remote_stop+0x24/0x6e0 kernel/kcov.c:1056
Code: e9 45 89 e0 eb 8c 55 41 57 41 56 41 55 41 54 53 48 83 ec 38 65 4c 8b 35 5a 2f 80 7e 65 8b 05 5b 2f 80 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:ffffc90000007970 EFLAGS: 00000206
RAX: 4f7d8a5d57efd900 RBX: ffff88807639a930 RCX: 4f7d8a5d57efd900
RDX: dffffc0000000000 RSI: ffffffff8a8c1820 RDI: ffffffff8adf5fa0
RBP: ffffc90000007bf0 R08: ffffffff90b1224f R09: 1ffffffff2162449
R10: dffffc0000000000 R11: fffffbfff216244a R12: 0000000000000246
R13: ffffffff8182403f R14: ffff88802f8b1e00 R15: ffff8880b8e2b178
 ieee80211_rx_list+0x2665/0x2e40 net/mac80211/rx.c:5320
 ieee80211_rx_napi+0x1aa/0x3c0 net/mac80211/rx.c:5340
 ieee80211_rx include/net/mac80211.h:4849 [inline]
 ieee80211_handle_queued_frames+0x104/0x1a0 net/mac80211/main.c:317
 tasklet_action_common+0x2d0/0x460 kernel/softirq.c:827
 handle_softirqs+0x291/0x910 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:preempt_schedule_irq+0xb6/0x160 kernel/sched/core.c:6875
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 32 1f f7 e8 f0 09 4f f7 fb bf 01 00 00 00 <e8> 25 ba ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc90004e9f8c0 EFLAGS: 00000282
RAX: 4f7d8a5d57efd900 RBX: 0000000000000000 RCX: 4f7d8a5d57efd900
RDX: dffffc0000000000 RSI: ffffffff8a8c1820 RDI: 0000000000000001
RBP: ffffc90004e9f960 R08: ffffffff90b1224f R09: 1ffffffff2162449
R10: dffffc0000000000 R11: fffffbfff216244a R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920009d3f18
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:batadv_hardif_get_by_netdev+0x162/0x3e0 net/batman-adv/hard-interface.c:71
Code: 7c 0f 0d 49 81 ff e0 11 08 97 0f 84 bb 01 00 00 4c 89 74 24 10 4c 89 6c 24 08 49 8d 5f 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 <74> 08 48 89 df e8 34 cb da f7 4c 39 33 74 0a e8 da 99 89 f7 e9 03
RSP: 0018:ffffc90004e9fa20 EFLAGS: 00000246
RAX: 1ffff1100b0def03 RBX: ffff8880586f7818 RCX: 0000000000080000
RDX: ffffc90006349000 RSI: 0000000000027846 RDI: 0000000000027847
RBP: ffffc90004e9fac8 R08: dffffc0000000000 R09: 1ffffffff2162448
R10: dffffc0000000000 R11: fffffbfff2162449 R12: dffffc0000000000
R13: 1ffff920009d3f48 R14: ffff888055bdc000 R15: ffff8880586f7800
 batadv_hard_if_event+0x7e/0x1510 net/batman-adv/hard-interface.c:961
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:455
 call_netdevice_notifiers_extack net/core/dev.c:2052 [inline]
 call_netdevice_notifiers net/core/dev.c:2066 [inline]
 register_netdevice+0x16a8/0x1b80 net/core/dev.c:10276
 ppp_unit_register drivers/net/ppp/ppp_generic.c:1224 [inline]
 ppp_dev_configure+0x875/0xad0 drivers/net/ppp/ppp_generic.c:1280
 ppp_create_interface drivers/net/ppp/ppp_generic.c:3378 [inline]
 ppp_unattached_ioctl drivers/net/ppp/ppp_generic.c:1065 [inline]
 ppp_ioctl+0x8eb/0x1b20 drivers/net/ppp/ppp_generic.c:731
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7f5d59e0d9
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:00007f7f5e471028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7f5d825fa0 RCX: 00007f7f5d59e0d9
RDX: 000000110e22fff6 RSI: 00000000c004743e RDI: 0000000000000008
RBP: 00007f7f5d635024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7f5d826038 R14: 00007f7f5d825fa0 R15: 00007fff296a2708
 </TASK>