rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P49/1:b..l P12/2:b..l P15081/1:b..l P5159/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=115689, q=223 ncpus=2)
task:udevd           state:R  running task     stack:23144 pid:5159  ppid:1      flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
 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:__follow_mount_rcu fs/namei.c:1517 [inline]
RIP: 0010:handle_mounts fs/namei.c:1546 [inline]
RIP: 0010:step_into+0x5dc/0xf10 fs/namei.c:1848
Code: 00 01 00 31 ff e8 a4 96 95 ff 44 89 f8 25 00 00 01 00 0f 84 fc 03 00 00 48 8b bc 24 a0 00 00 00 48 8b 74 24 18 e8 34 07 04 00 <48> 85 c0 0f 84 ff 04 00 00 49 89 c6 49 83 c6 20 4c 89 b4 24 a0 00
RSP: 0018:ffffc900032a79a0 EFLAGS: 00000293
RAX: ffff88801ba47380 RBX: ffffc900032a7c60 RCX: ffff88807d7a0000
RDX: 0000000000000000 RSI: 000000000000000e RDI: 0000000000000040
RBP: ffffc900032a7ab0 R08: ffff88802e8cb500 R09: 1ffff11005d196a0
R10: dffffc0000000000 R11: ffffed1005d196a1 R12: 1ffff92000654f93
R13: ffff88802e8cb490 R14: ffffc900032a7c98 R15: 0000000000210000
 walk_component fs/namei.c:2016 [inline]
 link_path_walk+0x6df/0xe00 fs/namei.c:2337
 path_parentat fs/namei.c:2538 [inline]
 __filename_parentat+0x205/0x610 fs/namei.c:2562
 filename_parentat fs/namei.c:2580 [inline]
 do_unlinkat+0xe9/0x570 fs/namei.c:4372
 __do_sys_unlink fs/namei.c:4447 [inline]
 __se_sys_unlink fs/namei.c:4445 [inline]
 __x64_sys_unlink+0x49/0x50 fs/namei.c:4445
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f17a1b15937
RSP: 002b:00007fff03fcf5a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007f17a1b15937
RDX: 0000000000000000 RSI: 00007fff03fcf690 RDI: 000055843a24202e
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
R13: 000055843a25d100 R14: 000055843a242008 R15: 0000000000000000
 </TASK>
task:kworker/1:0     state:R  running task     stack:23432 pid:15081 ppid:2      flags:0x00004000
Workqueue: events_power_efficient gc_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
 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:seqcount_lockdep_reader_access+0x17f/0x1c0 include/linux/seqlock.h:105
Code: f8 4d 85 e4 75 16 e8 d0 6d d9 f8 eb 15 e8 c9 6d d9 f8 e8 f4 9b c2 01 4d 85 e4 74 ea e8 ba 6d d9 f8 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3e 00 00 00 00 66 43 c7 44 3e 09 00 00 43 c6 44 3e 0b 00
RSP: 0018:ffffc9000ceb79a0 EFLAGS: 00000293
RAX: ffffffff88ac21c6 RBX: 0000000000000000 RCX: ffff8880242d3c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000ceb7a50 R08: ffffffff90da8597 R09: 1ffffffff21b50b2
R10: dffffc0000000000 R11: fffffbfff21b50b3 R12: 0000000000000200
R13: dffffc0000000000 R14: 1ffff920019d6f34 R15: dffffc0000000000
 nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:350 [inline]
 gc_worker+0x317/0x14b0 net/netfilter/nf_conntrack_core.c:1504
 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
 </TASK>
task:kworker/u4:1    state:R  running task     stack:21320 pid:12    ppid:2      flags:0x00004000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
 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:sta_info_hash_lookup net/mac80211/sta_info.c:193 [inline]
RIP: 0010:sta_info_get+0xf7/0x2a0 net/mac80211/sta_info.c:205
Code: 8b 55 04 01 48 c7 c7 40 4f be 8b be 14 03 00 00 48 c7 c2 80 4f be 8b e8 f7 09 88 f7 49 81 c4 c8 09 00 00 48 8b 05 49 ad de 01 <48> 8b 0d 3a ad de 01 48 8b 15 2b ad de 01 4c 8b 05 1c ad de 01 4c
RSP: 0018:ffffc900001177e8 EFLAGS: 00000286
RAX: 0000000000000000 RBX: ffffffff89dfa10f RCX: ffff888019e7da00
RDX: 0000000000000000 RSI: ffffffff8afc6a60 RDI: ffffffff8afc6a20
RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff21b50a0
R10: dffffc0000000000 R11: fffffbfff21b50a1 R12: ffff8880442897e8
R13: dffffc0000000000 R14: ffff88802e2d0c80 R15: ffff88804c8bea5a
 ieee80211_update_sta_info net/mac80211/ibss.c:1004 [inline]
 ieee80211_rx_bss_info net/mac80211/ibss.c:1122 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1613 [inline]
 ieee80211_ibss_rx_queued_mgmt+0xfe6/0x2ac0 net/mac80211/ibss.c:1642
 ieee80211_iface_process_skb net/mac80211/iface.c:1643 [inline]
 ieee80211_iface_work+0x717/0xc70 net/mac80211/iface.c:1697
 cfg80211_wiphy_work+0x225/0x260 net/wireless/core.c:437
 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
 </TASK>
task:kworker/u4:3    state:R  running task     stack:21800 pid:49    ppid:2      flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
 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+0x1f2/0x410 kernel/locking/lockdep.c:5758
Code: 00 9c 8f 84 24 80 00 00 00 f6 84 24 81 00 00 00 02 0f 85 f5 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 66 43 c7 44 3c 09 00 00 43 c6 44 3c 0b 00
RSP: 0018:ffffc90000ba78a0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: c4d4c9b003b05200
RDX: 0000000000000000 RSI: ffffffff8aaacee0 RDI: ffffffff8afc6a80
RBP: ffffc90000ba79a8 R08: dffffc0000000000 R09: 1ffffffff21b50a0
R10: dffffc0000000000 R11: fffffbfff21b50a1 R12: 1ffff92000174f20
R13: ffffffff8cd2ff20 R14: 0000000000000246 R15: dffffc0000000000
 rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 rcu_read_lock include/linux/rcupdate.h:786 [inline]
 batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:753 [inline]
 batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:824 [inline]
 batadv_iv_ogm_schedule+0x417/0xe90 net/batman-adv/bat_iv_ogm.c:867
 batadv_iv_send_outstanding_bat_ogm_packet+0x731/0x840 net/batman-adv/bat_iv_ogm.c:1711
 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
 </TASK>
rcu: rcu_preempt kthread starved for 10584 jiffies! g115689 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:27496 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 schedule+0xbd/0x170 kernel/sched/core.c:6773
 schedule_timeout+0x160/0x280 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1866
 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
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 16631 Comm: syz.1.2448 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 00 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 fa 13 ef f6 48 89 df e8 12 e6 ef f6 e8 2d 8c 13 f7 fb bf 01 00 00 00 <e8> 62 08 e3 f6 65 8b 05 53 51 8b 75 85 c0 74 02 5b c3 e8 70 35 88
RSP: 0018:ffffc900159dfc78 EFLAGS: 00000286
RAX: 26001e859f685600 RBX: ffff88802dfb6f00 RCX: 26001e859f685600
RDX: dffffc0000000000 RSI: ffffffff8aaabd60 RDI: 0000000000000001
RBP: ffff88802dfb6f00 R08: ffffffff8e4a8b2f R09: 1ffffffff1c95165
R10: dffffc0000000000 R11: fffffbfff1c95166 R12: ffff888030173c00
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffc900159dfe00
FS:  00007fbe061f66c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbe081e6098 CR3: 0000000068669000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x11f5/0x1400 kernel/signal.c:2905
 arch_do_signal_or_restart+0x9c/0x7b0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xf6/0x180 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+0x61/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fbe07f8efc9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbe061f60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fbe081e6098 RCX: 00007fbe07f8efc9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbe081e6098
RBP: 00007fbe081e6090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbe081e6128 R14: 00007ffe6b9fbaf0 R15: 00007ffe6b9fbbd8
 </TASK>