rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (9342 ticks this GP) idle=1c34/1/0x4000000000000000 softirq=23885/24999 fqs=3308
rcu: hardirqs softirqs csw/system
rcu: number: 1496925 1439 0
rcu: cputime: 13427 32575 42 ==> 46020(ms)
rcu: (t=10500 jiffies g=28505 q=2341 ncpus=2)
CPU: 0 PID: 8755 Comm: syz.2.851 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:99 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x4cf/0x2970 arch/x86/kernel/unwind_orc.c:494
Code: 75 3e 4d 63 2f 4d 01 fd 4c 89 ef 4c 89 f6 e8 d8 ea 4a 00 49 8d 47 04 4d 39 f5 4c 0f 46 e0 49 8d 47 fc 48 0f 47 d8 49 0f 46 ef <49> 39 dc 77 28 e8 a7 e8 4a 00 48 ba 00 00 00 00 00 fc ff df eb 97
RSP: 0018:ffffc90000007398 EFLAGS: 00000216
RAX: ffffffff8e61f858 RBX: ffffffff8e61f858 RCX: ffff888028289e00
RDX: 0000000000000100 RSI: ffffffff81dcd9eb RDI: ffffffff81dcd9f4
RBP: ffffffff8e61f84c R08: ffffc90000007530 R09: 0000000000000001
R10: 0000000000000004 R11: 0000000000000100 R12: ffffffff8e61f850
R13: ffffffff81dcd9f4 R14: ffffffff81dcd9eb R15: ffffffff8e61f85c
FS: 00007f16383786c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2b67c5 CR3: 000000002c2fc000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
kmem_cache_alloc_node+0x150/0x330 mm/slub.c:3540
kmalloc_reserve+0x95/0x240 net/core/skbuff.c:562
__alloc_skb+0x138/0x2c0 net/core/skbuff.c:653
__netdev_alloc_skb+0x10c/0x500 net/core/skbuff.c:717
netdev_alloc_skb include/linux/skbuff.h:3272 [inline]
dev_alloc_skb include/linux/skbuff.h:3285 [inline]
__ieee80211_beacon_get+0xe17/0x1600 net/mac80211/tx.c:5447
ieee80211_beacon_get_tim+0xb8/0x560 net/mac80211/tx.c:5569
ieee80211_beacon_get include/net/mac80211.h:5440 [inline]
mac80211_hwsim_beacon_tx+0x3c7/0x780 drivers/net/wireless/virtual/mac80211_hwsim.c:2265
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:766
ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:802
mac80211_hwsim_beacon+0xbb/0x1b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2295
__run_hrtimer kernel/time/hrtimer.c:1750 [inline]
__hrtimer_run_queues+0x51e/0xc40 kernel/time/hrtimer.c:1814
hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1831
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:task_dead_fair+0x4/0x1a0 kernel/sched/fair.c:8287
Code: 03 38 c1 0f 8c 6a ff ff ff 48 8b 7c 24 08 e8 13 1b 7d 00 e9 5b ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 f3 0f 1e fa <55> 41 57 41 56 41 55 41 54 53 50 48 89 fb 48 bd 00 00 00 00 00 fc
RSP: 0018:ffffc900198bf950 EFLAGS: 00000286
RAX: ffffffff815fe390 RBX: ffff888059b9bc00 RCX: ffffffff815c504a
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888059b9bc00
RBP: ffffc900198bf9b0 R08: ffff88802dfa1c83 R09: 1ffff11005bf4390
R10: dffffc0000000000 R11: ffffed1005bf4391 R12: ffff88802828a340
R13: dffffc0000000000 R14: ffffffff8c7c1b60 R15: ffff88802dfa1c80
finish_task_switch+0x43a/0x920 kernel/sched/core.c:5284
context_switch kernel/sched/core.c:5383 [inline]
__schedule+0x14da/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:__refcount_sub_and_test include/linux/refcount.h:282 [inline]
RIP: 0010:__refcount_dec_and_test include/linux/refcount.h:315 [inline]
RIP: 0010:refcount_dec_and_test include/linux/refcount.h:333 [inline]
RIP: 0010:put_task_struct+0x93/0xc0 include/linux/sched/task.h:126
Code: 89 df e8 50 80 a1 ff 48 c7 c7 60 e9 dc 8c 4c 89 f6 5b 41 5e 5d e9 bd df b9 ff bf 01 00 00 00 89 ee e8 51 f9 d7 ff 85 ed 7e 0a 98 f5 d7 ff 5b 41 5e 5d c3 e8 8e f5 d7 ff 4c 89 f7 be 03 00 00
RSP: 0018:ffffc900198bfd20 EFLAGS: 00000206
RAX: ffffffff81ad9b1f RBX: ffff888028289e00 RCX: 0000000000000002
RDX: ffff888028289e00 RSI: 0000000000000006 RDI: 0000000000000001
RBP: 0000000000000006 R08: ffff888028289e2b R09: 1ffff110050513c5
R10: dffffc0000000000 R11: ffffed10050513c6 R12: 0000000000000000
R13: 1ffff92003317fb8 R14: ffff888028289e28 R15: ffff888028289e00
__do_sys_perf_event_open kernel/events/core.c:12922 [inline]
__se_sys_perf_event_open+0x1865/0x1c20 kernel/events/core.c:12567
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: 0033:0x7f163758f749
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:00007f1638378038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f16377e6090 RCX: 00007f163758f749
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f1637613f91 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f16377e6128 R14: 00007f16377e6090 R15: 00007ffc5a469638