rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=b75c/1/0x4000000000000000 softirq=79163/79163 fqs=1
rcu: 	(detected by 0, t=10502 jiffies, g=66013, q=847 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12410 Comm: kworker/u8:26 Not tainted 6.13.0-rc5-syzkaller-00161-g63676eefb7a0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__remove_hrtimer+0x141/0x290 kernel/time/hrtimer.c:1120
Code: 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 29 01 00 00 41 21 6e 44 e8 79 e0 12 00 31 ff 44 89 ee e8 af e2 12 00 <45> 85 ed 0f 84 2f ff ff ff e8 61 e0 12 00 49 8d 7e 68 48 b8 00 00
RSP: 0018:ffffc90000a18df8 EFLAGS: 00000046
RAX: 0000000080010001 RBX: ffff88807a70e340 RCX: ffffffff818735a1
RDX: ffff88804bf8c880 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00000000fffffffd R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880b872ca00 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd52380d440 CR3: 000000006397a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1719 [inline]
 __hrtimer_run_queues+0x50b/0xae0 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__rcu_read_unlock+0x108/0x580 kernel/rcu/tree_plugin.h:440
Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 75 01 00 00 <8b> 83 44 04 00 00 3d ff ff ff 3f 0f 87 49 01 00 00 5b 5d 41 5c 41
RSP: 0018:ffffc90003667b60 EFLAGS: 00000246
RAX: 0000000000000007 RBX: ffff88804bf8c880 RCX: ffffc90003667b18
RDX: 0000000000000000 RSI: ffffffff8b6cdce0 RDI: ffff88804bf8ccc4
RBP: ffff88804bf8c880 R08: 0000000000000000 R09: fffffbfff20be72a
R10: ffffffff905f3957 R11: 0000000000000002 R12: ffff88804bf8c880
R13: 0000000000000001 R14: 0000000000000000 R15: dffffc0000000000
 rcu_read_unlock include/linux/rcupdate.h:882 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
 batadv_nc_worker+0x891/0x1060 net/batman-adv/network-coding.c:719
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: rcu_preempt kthread starved for 10495 jiffies! g66013 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27600 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 7905 Comm: kworker/u8:15 Not tainted 6.13.0-rc5-syzkaller-00161-g63676eefb7a0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:unwind_next_frame+0xdaa/0x20c0 arch/x86/kernel/unwind_orc.c:664
Code: 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 ff 0e 00 00 49 89 6d 40 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e ae 0e 00 00 41 39 5d 00 0f 85
RSP: 0018:ffffc90000006fe0 EFLAGS: 00000a06
RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffc90000008000
RDX: 1ffff92000000e0a RSI: ffffc90000007c38 RDI: ffffc90000007090
RBP: ffffc90000007d18 R08: ffffc90000007084 R09: ffffffff919a7468
R10: ffffc90000007050 R11: 0000000000099e87 R12: ffffc900000070a0
R13: ffffc90000007050 R14: ffffc90000007c68 R15: ffffc90000007c60
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005586c6b845b0 CR3: 000000000df7e000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 arch_stack_walk+0x95/0x100 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:544
 kvfree_call_rcu+0x74/0xbe0 kernel/rcu/tree.c:3820
 cfg80211_update_known_bss+0x3c0/0x11e0 net/wireless/scan.c:1892
 __cfg80211_bss_update+0x1aa/0x2440 net/wireless/scan.c:1939
 cfg80211_inform_single_bss_data+0x7b2/0x1df0 net/wireless/scan.c:2330
 cfg80211_inform_bss_data+0x205/0x3ba0 net/wireless/scan.c:3189
 cfg80211_inform_bss_frame_data+0x272/0x7a0 net/wireless/scan.c:3284
 ieee80211_bss_info_update+0x311/0xab0 net/mac80211/scan.c:226
 ieee80211_scan_rx+0x474/0xac0 net/mac80211/scan.c:340
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5232 [inline]
 ieee80211_rx_list+0x1bd7/0x2970 net/mac80211/rx.c:5469
 ieee80211_rx_napi+0xdd/0x400 net/mac80211/rx.c:5492
 ieee80211_rx include/net/mac80211.h:5166 [inline]
 ieee80211_handle_queued_frames+0xd5/0x130 net/mac80211/main.c:441
 tasklet_action_common+0x251/0x3f0 kernel/softirq.c:811
 handle_softirqs+0x213/0x8f0 kernel/softirq.c:561
 __do_softirq kernel/softirq.c:595 [inline]
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu+0x109/0x170 kernel/softirq.c:662
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x45d/0x1300 kernel/smp.c:884
Code: 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 ba 0e 0c 00 f3 90 41 0f b6 04 24 <40> 38 c5 7c 08 84 c0 0f 85 a7 0c 00 00 8b 43 08 31 ff 83 e0 01 41
RSP: 0018:ffffc90003ddf998 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b8744a40 RCX: ffffffff818e077c
RDX: ffff88805e860000 RSI: ffffffff818e0756 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000006 R12: ffffed10170e8949
R13: 0000000000000001 R14: ffff8880b8744a48 R15: ffff8880b863fe40
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1051
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:2114 [inline]
 text_poke_bp_batch+0x22b/0x760 arch/x86/kernel/alternative.c:2324
 text_poke_flush arch/x86/kernel/alternative.c:2515 [inline]
 text_poke_flush arch/x86/kernel/alternative.c:2512 [inline]
 text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2522
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 jump_label_update+0x1d7/0x400 kernel/jump_label.c:920
 static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:210
 static_key_enable+0x1a/0x20 kernel/jump_label.c:223
 toggle_allocation_gate mm/kfence/core.c:849 [inline]
 toggle_allocation_gate+0xfc/0x260 mm/kfence/core.c:841
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>