rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10264 ticks this GP) idle=a704/1/0x4000000000000000 softirq=74003/74004 fqs=5209
rcu: hardirqs softirqs csw/system
rcu: number: 1363824 172 0
rcu: cputime: 20176 32320 32 ==> 52510(ms)
rcu: (t=10504 jiffies g=103285 q=2587 ncpus=2)
CPU: 0 PID: 19256 Comm: syz.1.4607 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:preempt_count_sub+0x65/0x160 kernel/sched/core.c:5885
Code: ff ff ff 7f 39 cf 7f 25 81 ff ff 00 00 00 0f 93 c1 84 c0 0f 95 c0 08 c8 74 53 65 8b 05 7c 4e a7 7e f7 df 65 01 3d 73 4e a7 7e <5b> 5d c3 e8 03 79 c9 02 85 c0 74 f4 48 c7 c0 a0 1a 8b 8e 48 c1 e8
RSP: 0018:ffffc90000007380 EFLAGS: 00000213
RAX: 0000000000000102 RBX: dffffc0000000000 RCX: 0000000000000100
RDX: 0000000000000100 RSI: ffffc90000007918 RDI: 00000000ffffffff
RBP: 0000000000000002 R08: ffff888079953c00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffc90000007918
R13: ffffc90000007468 R14: ffffc90000007960 R15: ffffc90000007478
FS: 00007ff844fb76c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 00000000683d5000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
unwind_next_frame+0x1d1b/0x2990 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6a/0x4d0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
kmem_cache_alloc_node+0x1af/0x310 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:3304 [inline]
dev_alloc_skb include/linux/skbuff.h:3317 [inline]
__ieee80211_beacon_get+0xd5d/0x1520 net/mac80211/tx.c:5449
ieee80211_beacon_get_tim+0xbf/0x580 net/mac80211/tx.c:5571
ieee80211_beacon_get include/net/mac80211.h:5440 [inline]
mac80211_hwsim_beacon_tx+0x3bd/0x770 drivers/net/wireless/virtual/mac80211_hwsim.c:2265
__iterate_interfaces+0x225/0x4c0 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:1754 [inline]
__hrtimer_run_queues+0x525/0xc10 kernel/time/hrtimer.c:1818
hrtimer_run_softirq+0x177/0x290 kernel/time/hrtimer.c:1835
handle_softirqs+0x27d/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 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:schedule_debug kernel/sched/core.c:5938 [inline]
RIP: 0010:__schedule+0x15d/0x4660 kernel/sched/core.c:6591
Code: 00 fc ff df 80 3c 08 00 74 08 4c 89 f7 e8 6b 84 53 f7 4d 8b 36 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 4c 89 f7 e8 49 84 53 f7 49 81 3e 9d 6e ac 57 0f 85 c6 16 00
RSP: 0018:ffffc90003747860 EFLAGS: 00000246
RAX: 1ffff920006e8000 RBX: ffffffff8ca7aa30 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90003747a00
RBP: ffffc90003747a70 R08: ffffc900037479ff R09: 0000000000000000
R10: ffffc900037479f0 R11: fffff520006e8f40 R12: 0000000000000001
R13: ffff8880b8e00000 R14: ffffc90003740000 R15: ffff8880b8e3cca0
preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010
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:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:127 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:178 [inline]
RIP: 0010:kasan_check_range+0x89/0x290 mm/kasan/generic.c:187
Code: 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 3d 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 <0f> 85 8d 01 00 00 49 ff c3 48 ff c3 75 ee e9 1d 01 00 00 44 89 dd
RSP: 0018:ffffc90003747be8 EFLAGS: 00000246
RAX: ffffc90000a37a01 RBX: ffffffffffffffff RCX: ffffffff817b8f6a
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffc90000a37a00
RBP: ffffc90003747d30 R08: ffffc90000a37a03 R09: 1ffff92000146f40
R10: dffffc0000000000 R11: fffff52000146f40 R12: 0000000000000001
R13: 00007ff844415fac R14: fffff52000146f41 R15: 1ffff92000146f40
instrument_atomic_read include/linux/instrumented.h:68 [inline]
atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
futex_hb_waiters_pending kernel/futex/futex.h:213 [inline]
futex_wake+0x15a/0x4f0 kernel/futex/waitwake.c:161
do_futex+0x35d/0x3e0 kernel/futex/syscalls.c:139
__do_sys_futex kernel/futex/syscalls.c:211 [inline]
__se_sys_futex+0x3a9/0x440 kernel/futex/syscalls.c:192
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff84419ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff844fb70e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007ff844415fa8 RCX: 00007ff84419ce59
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff844415fac
RBP: 00007ff844415fa0 R08: 0000000000745a24 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff844416038 R14: 00007ffd23274b70 R15: 00007ffd23274c58