rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7425/1:b..l P1137/2:b..l P12/1:b..l P7724/1:b..l P7679/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=19153, q=1268526 ncpus=2)
task:kworker/u8:12 state:R running task stack:25608 pid:7679 tgid:7679 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
context_switch kernel/sched/core.c:5351 [inline]
__schedule+0x118d/0x5df0 kernel/sched/core.c:6954
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7281
irqentry_exit+0x36/0x90 kernel/entry/common.c:196
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x183/0x2f0 kernel/locking/lockdep.c:5893
Code: 0f c1 05 f8 8a 38 12 83 f8 01 0f 85 1d 01 00 00 9c 58 f6 c4 02 0f 85 08 01 00 00 41 f7 c5 00 02 00 00 74 01 fb 48 8b 44 24 10 <65> 48 2b 05 0d 49 38 12 0f 85 58 01 00 00 48 83 c4 18 5b 41 5c 41
RSP: 0000:ffffc900037d6df0 EFLAGS: 00000206
RAX: 80213b6374aa9d00 RBX: ffffffff8e5c3a20 RCX: ffffc900037d6dfc
RDX: 0000000000000003 RSI: ffffffff8ddeda27 RDI: ffffffff8c160b80
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000001217c R12: ffffffff816aeec4
R13: 0000000000000202 R14: ffff888032098000 R15: 0000000000000004
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0x3f9/0x20a0 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4364 [inline]
__kmalloc_noprof+0x223/0x510 mm/slub.c:4376
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
cfg80211_inform_single_bss_data+0x53e/0x1df0 net/wireless/scan.c:2351
cfg80211_inform_bss_data+0x224/0x3bc0 net/wireless/scan.c:3234
cfg80211_inform_bss_frame_data+0x26f/0x750 net/wireless/scan.c:3325
ieee80211_bss_info_update+0x310/0xab0 net/mac80211/scan.c:226
ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1573 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1905/0x2fd0 net/mac80211/ibss.c:1600
ieee80211_iface_process_skb net/mac80211/iface.c:1699 [inline]
ieee80211_iface_work+0xe2e/0x1360 net/mac80211/iface.c:1753
cfg80211_wiphy_work+0x3dc/0x550 net/wireless/core.c:435
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:kworker/u8:13 state:R running task stack:25672 pid:7724 tgid:7724 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
context_switch kernel/sched/core.c:5351 [inline]
__schedule+0x118d/0x5df0 kernel/sched/core.c:6954
preempt_schedule_notrace+0x62/0xe0 kernel/sched/core.c:7231
preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13
rcu_is_watching+0x8e/0xc0 kernel/rcu/tree.c:752
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x201/0x2f0 kernel/locking/lockdep.c:5879
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0x3f9/0x20a0 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2416 [inline]
slab_free mm/slub.c:4679 [inline]
kfree+0x2b4/0x4d0 mm/slub.c:4878
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1574 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1a92/0x2fd0 net/mac80211/ibss.c:1600
ieee80211_iface_process_skb net/mac80211/iface.c:1699 [inline]
ieee80211_iface_work+0xe2e/0x1360 net/mac80211/iface.c:1753
cfg80211_wiphy_work+0x3dc/0x550 net/wireless/core.c:435
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:kworker/u8:0 state:R running task stack:23512 pid:12 tgid:12 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
context_switch kernel/sched/core.c:5351 [inline]
__schedule+0x118d/0x5df0 kernel/sched/core.c:6954
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7281
irqentry_exit+0x36/0x90 kernel/entry/common.c:196
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5872
Code: 43 38 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 e2 f9 0f 0f 0f 82 74 02 00 00 8b 35 ca 2b 10 0f 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 79 43 38 12 0f 85 c7 02 00 00 48 83 c4
RSP: 0000:ffffc90000117600 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e5c3a20 RCX: 00000000dcc51681
RDX: 0000000000000000 RSI: ffffffff8ddeda27 RDI: ffffffff8c160b80
RBP: 0000000000000002 R08: 8b3111363e37e9d2 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2416 [inline]
slab_free mm/slub.c:4679 [inline]
kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4781
skb_kfree_head net/core/skbuff.c:1045 [inline]
skb_kfree_head net/core/skbuff.c:1042 [inline]
skb_free_head+0x1b7/0x210 net/core/skbuff.c:1059
skb_release_data+0x795/0x9e0 net/core/skbuff.c:1086
skb_release_all net/core/skbuff.c:1151 [inline]
__kfree_skb net/core/skbuff.c:1165 [inline]
sk_skb_reason_drop+0x129/0x1a0 net/core/skbuff.c:1203
kfree_skb_reason include/linux/skbuff.h:1275 [inline]
kfree_skb include/linux/skbuff.h:1284 [inline]
ieee80211_iface_work+0x435/0x1360 net/mac80211/iface.c:1755
cfg80211_wiphy_work+0x3dc/0x550 net/wireless/core.c:435
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:kworker/u8:6 state:R running task stack:23624 pid:1137 tgid:1137 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
context_switch kernel/sched/core.c:5351 [inline]
__schedule+0x118d/0x5df0 kernel/sched/core.c:6954
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7281
irqentry_exit+0x36/0x90 kernel/entry/common.c:196
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x183/0x2f0 kernel/locking/lockdep.c:5893
Code: 0f c1 05 f8 8a 38 12 83 f8 01 0f 85 1d 01 00 00 9c 58 f6 c4 02 0f 85 08 01 00 00 41 f7 c5 00 02 00 00 74 01 fb 48 8b 44 24 10 <65> 48 2b 05 0d 49 38 12 0f 85 58 01 00 00 48 83 c4 18 5b 41 5c 41
RSP: 0018:ffffc9000400f908 EFLAGS: 00000206
RAX: 130298e58c27d700 RBX: ffffffff8e5c3a20 RCX: ffffc9000400f914
RDX: 0000000000000004 RSI: ffffffff8ddeda27 RDI: ffffffff8c160b80
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff8af9cd7d
R13: 0000000000000202 R14: ffff88802855a440 R15: 0000000000000005
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
sta_info_get+0x132/0x340 net/mac80211/sta_info.c:213
ieee80211_update_sta_info net/mac80211/ibss.c:979 [inline]
ieee80211_rx_bss_info net/mac80211/ibss.c:1092 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1573 [inline]
ieee80211_ibss_rx_queued_mgmt+0xffc/0x2fd0 net/mac80211/ibss.c:1600
ieee80211_iface_process_skb net/mac80211/iface.c:1699 [inline]
ieee80211_iface_work+0xe2e/0x1360 net/mac80211/iface.c:1753
cfg80211_wiphy_work+0x3dc/0x550 net/wireless/core.c:435
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:kworker/u8:10 state:R running task stack:25608 pid:7425 tgid:7425 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: events_unbound cfg80211_wiphy_work
Call Trace:
context_switch kernel/sched/core.c:5351 [inline]
__schedule+0x118d/0x5df0 kernel/sched/core.c:6954
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7281
irqentry_exit+0x36/0x90 kernel/entry/common.c:196
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:unwind_next_frame+0x168/0x20a0 arch/x86/kernel/unwind_orc.c:494
Code: b8 00 00 00 00 00 fc ff df 4d 8d 75 35 4c 89 f2 48 c1 ea 03 0f b6 04 02 4c 89 f2 83 e2 07 38 d0 7f 08 84 c0 0f 85 e4 09 00 00 <48> 89 e9 41 0f b6 45 35 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03
RSP: 0018:ffffc90002e46e38 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 00000000dcc51681
RDX: 0000000000000005 RSI: ffffffff8c160b00 RDI: ffffffff8df20e28
RBP: ffffc90002e46ef0 R08: 8b3111363e37e9d2 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc90002e46ef8
R13: ffffc90002e46ea8 R14: ffffc90002e46edd R15: ffff88802b9d4880
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4364 [inline]
__kmalloc_noprof+0x223/0x510 mm/slub.c:4376
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
cfg80211_inform_single_bss_data+0x53e/0x1df0 net/wireless/scan.c:2351
cfg80211_inform_bss_data+0x224/0x3bc0 net/wireless/scan.c:3234
cfg80211_inform_bss_frame_data+0x26f/0x750 net/wireless/scan.c:3325
ieee80211_bss_info_update+0x310/0xab0 net/mac80211/scan.c:226
ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1573 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1905/0x2fd0 net/mac80211/ibss.c:1600
ieee80211_iface_process_skb net/mac80211/iface.c:1699 [inline]
ieee80211_iface_work+0xe2e/0x1360 net/mac80211/iface.c:1753
cfg80211_wiphy_work+0x3dc/0x550 net/wireless/core.c:435
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: rcu_preempt kthread starved for 10686 jiffies! g19153 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:27784 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5351 [inline]
__schedule+0x118d/0x5df0 kernel/sched/core.c:6954
__schedule_loop kernel/sched/core.c:7036 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7051
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xb00 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x270/0x380 kernel/rcu/tree.c:2285
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.16.0-syzkaller-06699-ge8d780dcd957 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82
Code: cb 66 02 e9 43 0b 03 00 0f 1f 00 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 c3 bc 1e 00 fb f4 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0000:ffffc90000197df8 EFLAGS: 000002c6
RAX: 000000000098a29d RBX: 0000000000000001 RCX: ffffffff8b8b5c99
RDX: 0000000000000000 RSI: ffffffff8de12f1c RDI: ffffffff8c160b80
RBP: ffffed1003c5d488 R08: 0000000000000001 R09: ffffed10170a6655
R10: ffff8880b85332ab R11: 0000000000000001 R12: 0000000000000001
R13: ffff88801e2ea440 R14: ffffffff90a7d650 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88812481e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f50cc5296c8 CR3: 000000005bb73000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:757
default_idle_call+0x6d/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:190 [inline]
do_idle+0x391/0x510 kernel/sched/idle.c:330
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:428
start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x148