rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-....: (0 ticks this GP) idle=62fc/1/0x4000000000000000 softirq=19974/19974 fqs=5221
rcu: hardirqs softirqs csw/system
rcu: number: 11994692 0 0
rcu: cputime: 7640 44887 0 ==> 52510(ms)
rcu: (detected by 0, t=10502 jiffies, g=16685, q=8656 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1131 Comm: kworker/u4:7 Not tainted 6.6.101-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:check_preemption_disabled+0x2e/0x110 lib/smp_processor_id.c:55
Code: 56 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 65 8b 05 2d 8c 96 75 65 8b 0d 22 8c 96 75 f7 c1 ff ff ff 7f 74 1f <65> 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 48 83
RSP: 0018:ffffc900001f0618 EFLAGS: 00000002
RAX: 0000000000000001 RBX: ffff8880b8f3d370 RCX: 0000000000000102
RDX: ffff88802361bc00 RSI: ffffffff8afc6760 RDI: ffffffff8afc6720
RBP: 0000000000000001 R08: ffff8880b8f3d37b R09: 1ffff110171e7a6f
R10: dffffc0000000000 R11: ffffed10171e7a70 R12: dffffc0000000000
R13: dffffc0000000001 R14: ffff8880b8f3d378 R15: 0000000000000023
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9c0445d0a0 CR3: 000000000cb30000 CR4: 00000000003506e0
Call Trace:
__irq_work_queue_local+0x56/0x3b0 kernel/irq_work.c:-1
irq_work_queue_on+0x122/0x220 kernel/irq_work.c:175
rcu_read_unlock_special+0x3a7/0x4c0 kernel/rcu/tree_plugin.h:675
__rcu_read_unlock+0x7c/0xd0 kernel/rcu/tree_plugin.h:426
rcu_read_unlock include/linux/rcupdate.h:818 [inline]
trace_call_bpf+0x59f/0x690 kernel/trace/bpf_trace.c:145
perf_trace_run_bpf_submit+0x7a/0x1c0 kernel/events/core.c:10248
perf_trace_preemptirq_template+0x281/0x340 include/trace/events/preemptirq.h:14
trace_irq_enable+0xbf/0xe0 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x18/0x40 kernel/trace/trace_preemptirq.c:56
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:723
RIP: 0010:rcu_read_unlock_special+0x88/0x4c0 kernel/rcu/tree_plugin.h:682
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 a9 4e 93 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900001f0b00 EFLAGS: 00000206
RAX: ad16f03af40b5700 RBX: 1ffff9200003e168 RCX: ad16f03af40b5700
RDX: dffffc0000000000 RSI: ffffffff8aaaba40 RDI: ffffffff8afc6780
RBP: ffffc900001f0c00 R08: ffffffff90da360f R09: 1ffffffff21b46c1
R10: dffffc0000000000 R11: fffffbfff21b46c2 R12: ffffffff8cd35400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
__rcu_read_unlock+0x7c/0xd0 kernel/rcu/tree_plugin.h:426
rcu_read_unlock include/linux/rcupdate.h:818 [inline]
ieee80211_rx_napi+0x21d/0x3c0 net/mac80211/rx.c:5430
ieee80211_rx include/net/mac80211.h:4969 [inline]
ieee80211_handle_queued_frames+0x106/0x1a0 net/mac80211/main.c:319
tasklet_action_common+0x2eb/0x4c0 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+0xc7/0x190 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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:lock_release+0x5b6/0x8b0 kernel/locking/lockdep.c:5778
Code: 43 c6 44 2f 0b 00 65 48 8b 04 25 28 00 00 00 48 3b 84 24 c0 00 00 00 0f 85 8b 00 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f <5d> c3 0f 0b e9 d5 fa ff ff 0f 0b 48 c7 c7 40 ba aa 8a e8 13 9f 05
RSP: 0018:ffffc90004c6fb50 EFLAGS: 00000246
RAX: ad16f03af40b5700 RBX: ffff88805f3822c0 RCX: ad16f03af40b5700
RDX: 0000000000000002 RSI: ffffffff8aaacbc0 RDI: ffffffff8afc6780
RBP: ffffc90004c6fb50 R08: ffffffff8e4a84ef R09: 1ffffffff1c9509d
R10: dffffc0000000000 R11: fffffbfff1c9509e R12: dffffc0000000000
R13: ffffffff8a357ef2 R14: ffff88807ef50c80 R15: 00000000000003a8
rcu_lock_release include/linux/rcupdate.h:344 [inline]
rcu_read_unlock include/linux/rcupdate.h:819 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x291/0x610 net/batman-adv/network-coding.c:719
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293