rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P12/1:b..l P2113/1:b..l P3688/2:b..l P9155/2:b..l P56/1:b..l P102/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=31077, q=150 ncpus=2)
task:kworker/u8:5 state:R running task stack:21536 pid:102 tgid:102 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f9/0x5500 kernel/sched/core.c:7197
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7521
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x14f/0x780 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5874
Code: ff ff ff e8 31 19 88 09 f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 0b a4 cf 10 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 58 87 ed
RSP: 0018:ffffc90001586e30 EFLAGS: 00000286
RAX: 0d7d133b47a5be00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000ae02ccdb RSI: ffffffff8d885404 RDI: ffffffff8ba85b60
RBP: ffffffff8b2af03c R08: ffffffff8b2af03c R09: ffffffff8dfc8300
R10: dffffc0000000000 R11: fffffbfff1f157ff R12: 0000000000000002
R13: ffffffff8dfc8300 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
__rt_spin_trylock kernel/locking/spinlock_rt.c:110 [inline]
rt_spin_trylock+0x128/0x2b0 kernel/locking/spinlock_rt.c:118
alloc_from_pcs mm/slub.c:4756 [inline]
slab_alloc_node mm/slub.c:4896 [inline]
__do_kmalloc_node mm/slub.c:5307 [inline]
__kmalloc_noprof+0x1fd/0x7b0 mm/slub.c:5320
kmalloc_noprof include/linux/slab.h:954 [inline]
kzalloc_noprof include/linux/slab.h:1188 [inline]
cfg80211_inform_single_bss_data+0x932/0x1b80 net/wireless/scan.c:2344
cfg80211_inform_bss_data+0x25d/0x3c40 net/wireless/scan.c:3226
cfg80211_inform_bss_frame_data+0x3c7/0x730 net/wireless/scan.c:3317
ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230
ieee80211_rx_bss_info net/mac80211/ibss.c:1091 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1572 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1901/0x2cb0 net/mac80211/ibss.c:1599
ieee80211_iface_process_skb net/mac80211/iface.c:1757 [inline]
ieee80211_iface_work+0x78b/0x1020 net/mac80211/iface.c:1811
cfg80211_wiphy_work+0x2cf/0x460 net/wireless/core.c:538
process_one_work+0xa31/0x1980 kernel/workqueue.c:3320
process_scheduled_works kernel/workqueue.c:3423 [inline]
worker_thread+0xba8/0x11e0 kernel/workqueue.c:3509
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:kworker/u8:3 state:R running task stack:21120 pid:56 tgid:56 ppid:2 task_flags:0x4208160 flags:0x00080000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f9/0x5500 kernel/sched/core.c:7197
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7378
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
rt_mutex_wake_up_q kernel/locking/rtmutex.c:583 [inline]
rt_mutex_slowunlock+0x681/0x8b0 kernel/locking/rtmutex.c:1482
spin_unlock_bh include/linux/spinlock_rt.h:115 [inline]
cfg80211_inform_single_bss_data+0x1438/0x1b80 net/wireless/scan.c:2388
cfg80211_inform_bss_data+0x25d/0x3c40 net/wireless/scan.c:3226
cfg80211_inform_bss_frame_data+0x3c7/0x730 net/wireless/scan.c:3317
ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230
ieee80211_rx_bss_info net/mac80211/ibss.c:1091 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1572 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1901/0x2cb0 net/mac80211/ibss.c:1599
ieee80211_iface_process_skb net/mac80211/iface.c:1757 [inline]
ieee80211_iface_work+0x78b/0x1020 net/mac80211/iface.c:1811
cfg80211_wiphy_work+0x2cf/0x460 net/wireless/core.c:538
process_one_work+0xa31/0x1980 kernel/workqueue.c:3320
process_scheduled_works kernel/workqueue.c:3423 [inline]
worker_thread+0xba8/0x11e0 kernel/workqueue.c:3509
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:syz.0.701 state:R running task stack:25320 pid:9155 tgid:9152 ppid:5617 task_flags:0x40054c flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f9/0x5500 kernel/sched/core.c:7197
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7521
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x14f/0x780 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x2a/0xa0 kernel/kcov.c:314
Code: f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 48 4b ab 10 65 44 8b 05 68 4b ab 10 41 81 e0 00 00 ff 00 ba 00 01 00 00 23 91 e4 0b 00 00 <41> 89 d1 45 09 c1 74 12 45 85 c0 75 5f 85 d2 74 5b 83 b9 b4 16 00
RSP: 0018:ffffc9000479eff8 EFLAGS: 00000246
RAX: ffffffff8206b0a5 RBX: 0000000000000000 RCX: ffff88801e32dc40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000005
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000211381 R12: 0000000000000002
R13: ffff88801cea5548 R14: ffff88801cea5900 R15: 0000000000000001
lru_gen_update_size+0x225/0xd20 include/linux/mm_inline.h:189
lru_gen_del_folio+0x31c/0x540 include/linux/mm_inline.h:301
lruvec_del_folio include/linux/mm_inline.h:385 [inline]
__page_cache_release+0x59f/0xd30 mm/swap.c:78
folios_put_refs+0x3ab/0x8f0 mm/swap.c:1032
folio_batch_release include/linux/folio_batch.h:101 [inline]
shmem_undo_range+0x52c/0x1660 mm/shmem.c:1149
shmem_truncate_range mm/shmem.c:1277 [inline]
shmem_evict_inode+0x289/0xae0 mm/shmem.c:1407
evict+0x61e/0xb10 fs/inode.c:841
__dentry_kill+0x1a2/0x690 fs/dcache.c:718
finish_dput+0xc9/0x480 fs/dcache.c:927
__fput+0x6a3/0xa70 fs/file_table.c:518
task_work_run+0x1d9/0x270 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x70f/0x22c0 kernel/exit.c:975
do_group_exit+0x21b/0x2d0 kernel/exit.c:1117
get_signal+0x1284/0x1330 kernel/signal.c:3037
arch_do_signal_or_restart+0xbc/0x840 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop+0x86/0x4d0 kernel/entry/common.c:98
task:kworker/u8:11 state:R running task stack:20832 pid:3688 tgid:3688 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: bat_events batadv_mcast_mla_update
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f9/0x5500 kernel/sched/core.c:7197
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7521
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x14f/0x780 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5874
Code: ff ff ff e8 31 19 88 09 f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 0b a4 cf 10 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 58 87 ed
RSP: 0018:ffffc9000c6c73f8 EFLAGS: 00000282
RAX: ce60bf08bf7dfd00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000007cd821ac RSI: ffffffff8d885404 RDI: ffffffff8ba85b60
RBP: ffffffff8176f286 R08: ffffffff8176f286 R09: ffffffff8dfc8300
R10: ffffc9000c6c7558 R11: ffffffff81afd3e0 R12: 0000000000000002
R13: ffffffff8dfc8300 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
class_rcu_constructor include/linux/rcupdate.h:1181 [inline]
unwind_next_frame+0xc3/0x2550 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_noprof+0x3a6/0x690 mm/slub.c:5432
kmalloc_noprof include/linux/slab.h:950 [inline]
batadv_mcast_mla_meshif_get_ipv4 net/batman-adv/multicast.c:402 [inline]
batadv_mcast_mla_meshif_get net/batman-adv/multicast.c:529 [inline]
__batadv_mcast_mla_update net/batman-adv/multicast.c:909 [inline]
batadv_mcast_mla_update+0xfe3/0x3710 net/batman-adv/multicast.c:946
process_one_work+0xa31/0x1980 kernel/workqueue.c:3320
process_scheduled_works kernel/workqueue.c:3423 [inline]
worker_thread+0xba8/0x11e0 kernel/workqueue.c:3509
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:kworker/u8:8 state:R running task stack:22928 pid:2113 tgid:2113 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: wg-kex-wg2 wg_packet_handshake_send_worker
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f9/0x5500 kernel/sched/core.c:7197
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7378
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
rt_mutex_wake_up_q kernel/locking/rtmutex.c:583 [inline]
rt_mutex_slowunlock+0x681/0x8b0 kernel/locking/rtmutex.c:1482
spin_unlock_irqrestore include/linux/spinlock_rt.h:129 [inline]
__wake_up_common_lock+0x18a/0x1e0 kernel/sched/wait.c:127
__wake_up kernel/sched/wait.c:146 [inline]
__wake_up_bit kernel/sched/wait_bit.c:129 [inline]
wake_up_bit+0xfb/0x150 kernel/sched/wait_bit.c:160
unlock_buffer fs/buffer.c:79 [inline]
end_buffer_write_sync+0x102/0x180 fs/buffer.c:174
end_bio_bh_io_sync+0xbd/0x120 fs/buffer.c:2673
blk_update_request+0x57e/0xe60 block/blk-mq.c:1016
blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1178
blk_complete_reqs block/blk-mq.c:1253 [inline]
blk_done_softirq+0x10a/0x160 block/blk-mq.c:1258
handle_softirqs+0x1de/0x6d0 kernel/softirq.c:626
__do_softirq kernel/softirq.c:660 [inline]
__local_bh_enable_ip+0x170/0x2b0 kernel/softirq.c:302
local_bh_enable include/linux/bottom_half.h:33 [inline]
spin_unlock_bh include/linux/spinlock_rt.h:116 [inline]
wg_index_hashtable_insert+0x12e/0x8c0 drivers/net/wireguard/peerlookup.c:126
wg_noise_handshake_create_initiation+0x64e/0x830 drivers/net/wireguard/noise.c:569
wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:34 [inline]
wg_packet_handshake_send_worker+0x18d/0x350 drivers/net/wireguard/send.c:51
process_one_work+0xa31/0x1980 kernel/workqueue.c:3320
process_scheduled_works kernel/workqueue.c:3423 [inline]
worker_thread+0xba8/0x11e0 kernel/workqueue.c:3509
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:kworker/u8:0 state:R running task stack:21120 pid:12 tgid:12 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f9/0x5500 kernel/sched/core.c:7197
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7521
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x14f/0x780 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:unwind_next_frame+0x1a8c/0x2550 arch/x86/kernel/unwind_orc.c:694
Code: 96 c1 4c 39 e0 0f 97 c2 20 ca 80 fa 01 0f 85 63 01 00 00 49 8d 4c 24 08 4c 39 e9 0f 86 55 01 00 00 48 39 c1 0f 87 4c 01 00 00 <4c> 3b a4 24 90 00 00 00 4c 8b 7c 24 50 0f 87 c9 00 00 00 49 8d 5e
RSP: 0018:ffffc900001169d8 EFLAGS: 00000283
RAX: ffffc90000118000 RBX: ffffffff90187201 RCX: ffffc90000116b10
RDX: ffffc90000116b01 RSI: dffffc0000000000 RDI: ffffc90000116b10
RBP: dffffc0000000000 R08: ffffc90000116af8 R09: 0000000000000000
R10: ffffc90000116b58 R11: fffff52000022d6d R12: ffffc90000116b08
R13: ffffc90000110000 R14: ffffc90000116b08 R15: ffffc90000116b18
__unwind_start+0x5b8/0x760 arch/x86/kernel/unwind_orc.c:787
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe3/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__do_kmalloc_node mm/slub.c:5308 [inline]
__kmalloc_noprof+0x3e7/0x7b0 mm/slub.c:5320
kmalloc_noprof include/linux/slab.h:954 [inline]
kzalloc_noprof include/linux/slab.h:1188 [inline]
cfg80211_inform_single_bss_data+0x932/0x1b80 net/wireless/scan.c:2344
cfg80211_inform_bss_data+0x25d/0x3c40 net/wireless/scan.c:3226
cfg80211_inform_bss_frame_data+0x3c7/0x730 net/wireless/scan.c:3317
ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230
ieee80211_rx_bss_info net/mac80211/ibss.c:1091 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1572 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1901/0x2cb0 net/mac80211/ibss.c:1599
ieee80211_iface_process_skb net/mac80211/iface.c:1757 [inline]
ieee80211_iface_work+0x78b/0x1020 net/mac80211/iface.c:1811
cfg80211_wiphy_work+0x2cf/0x460 net/wireless/core.c:538
process_one_work+0xa31/0x1980 kernel/workqueue.c:3320
process_scheduled_works kernel/workqueue.c:3423 [inline]
worker_thread+0xba8/0x11e0 kernel/workqueue.c:3509
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g31077 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=23995
rcu: rcu_preempt kthread starved for 10500 jiffies! g31077 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27736 pid:18 tgid:18 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f9/0x5500 kernel/sched/core.c:7197
__schedule_loop kernel/sched/core.c:7276 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7291
schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x312/0x11b0 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: 7b 64 02 e9 83 cc 03 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 43 eb 20 00 fb f4 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffffff8dc07dc0 EFLAGS: 00000246
RAX: 000000000067c9db RBX: ffffffff81997f6a RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8d624da5 RDI: ffffffff8ba85b60
RBP: ffffffff8dc07eb0 R08: ffff8880b8633d1b R09: 1ffff110170c67a3
R10: dffffc0000000000 R11: ffffed10170c67a4 R12: 0000000000000000
R13: 1ffffffff1b9fdd8 R14: 0000000000000000 R15: 1ffffffff1b9fdd8
FS: 0000000000000000(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000004000 CR3: 000000005746a000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/kernel/process.c:766 [inline]
default_idle+0x9/0x20 arch/x86/kernel/process.c:767
default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x36a/0x5f0 kernel/sched/idle.c:352
cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:451
rest_init+0x2de/0x300 init/main.c:762
start_kernel+0x38a/0x3e0 init/main.c:1220
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x157