rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P15280/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=66073, q=591 ncpus=2)
task:syz.3.2464 state:R running task stack:24904 pid:15280 ppid:12047 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x15ae/0x4660 kernel/sched/core.c:6701
preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7011
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:should_resched arch/x86/include/asm/preempt.h:104 [inline]
RIP: 0010:__local_bh_enable_ip+0x142/0x1c0 kernel/softirq.c:413
Code: 8a e8 f2 53 3c 09 65 66 8b 05 ba eb b0 7e 66 85 c0 75 54 bf 01 00 00 00 e8 2b 1d 0a 00 e8 56 16 3b 00 fb 65 8b 05 86 eb b0 7e <85> c0 75 05 e8 35 d0 ad ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc900042c7a00 EFLAGS: 00000286
RAX: 0000000080000000 RBX: 0000000000000200 RCX: b53fb6a68e6fe200
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1d32e0
RBP: ffffc900042c7a90 R08: ffffffff8e8c772f R09: 1ffffffff1d18ee5
R10: dffffc0000000000 R11: fffffbfff1d18ee6 R12: ffffffff88bf0e64
R13: ffffc900042c7d00 R14: dffffc0000000000 R15: 1ffff92000858f40
local_bh_enable include/linux/bottom_half.h:33 [inline]
bpf_test_run+0x3dd/0x870 net/bpf/test_run.c:425
bpf_prog_test_run_skb+0xdbb/0x18f0 net/bpf/test_run.c:1089
bpf_prog_test_run+0x31f/0x390 kernel/bpf/syscall.c:4132
__sys_bpf+0x49d/0x890 kernel/bpf/syscall.c:5496
__do_sys_bpf kernel/bpf/syscall.c:5582 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5580 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5580
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: 0033:0x7f456199e0d9
RSP: 002b:00007f45627f1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f4561c26090 RCX: 00007f456199e0d9
RDX: 0000000000000050 RSI: 0000200000000080 RDI: 000000000000000a
RBP: 00007f4561a35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4561c26128 R14: 00007f4561c26090 R15: 00007fff50b605e8
rcu: rcu_preempt kthread starved for 1991 jiffies! g66073 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:26856 pid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x15ae/0x4660 kernel/sched/core.c:6701
schedule+0xbd/0x170 kernel/sched/core.c:6775
schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x30d/0x1590 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x9d/0x3b0 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
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 15278 Comm: syz.3.2464 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:ktime_get_with_offset+0x52/0x330 kernel/time/timekeeping.c:883
Code: fd 02 0f 87 d9 02 00 00 e8 eb c5 0f 00 48 b9 00 00 00 00 00 fc ff df 48 8d 1c dd a0 c5 cc 8a 48 89 d8 48 c1 e8 03 80 3c 08 00 <74> 08 48 89 df e8 f4 48 68 00 48 8b 03 48 89 04 24 8b 2d a3 cc 14
RSP: 0018:ffffc90000007948 EFLAGS: 00000246
RAX: 1ffffffff15998b5 RBX: ffffffff8accc5a8 RCX: dffffc0000000000
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 0000000000000001 R08: ffff88802bba8000 R09: 0000000000000002
R10: 0000000000000080 R11: 0000000000000100 R12: ffff88807d56b618
R13: ffff88805c1fe2e8 R14: dffffc0000000000 R15: 0000000000000080
FS: 00007f45628126c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff6c8b0150 CR3: 000000005fb6e000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
ktime_get_boottime include/linux/timekeeping.h:95 [inline]
ktime_get_boottime_ns include/linux/timekeeping.h:164 [inline]
mac80211_hwsim_tx_frame_no_nl+0x6fe/0x11e0 drivers/net/wireless/virtual/mac80211_hwsim.c:1784
mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2176
mac80211_hwsim_beacon_tx+0x3df/0x770 drivers/net/wireless/virtual/mac80211_hwsim.c:2269
__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:end_of_stack include/linux/sched/task_stack.h:32 [inline]
RIP: 0010:schedule_debug kernel/sched/core.c:5939 [inline]
RIP: 0010:__schedule+0x13b/0x4660 kernel/sched/core.c:6592
Code: 08 4c 89 ff e8 d6 e3 48 f7 49 8b 07 48 89 44 24 28 4c 8d 70 20 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 ab e3 48 f7 4d 8b 36 4c 89 f0 48 c1 e8 03 48 b9
RSP: 0018:ffffc9000471f740 EFLAGS: 00000246
RAX: 1ffff11005775004 RBX: ffffffff8ca95a30 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000471f8e0
RBP: ffffc9000471f950 R08: ffffc9000471f8df R09: 0000000000000000
R10: ffffc9000471f8d0 R11: fffff520008e3f1c R12: 0000000000000001
R13: ffff8880b8e00000 R14: ffff88802bba8020 R15: ffff8880b8e3cca0
preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7011
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:arch_atomic_dec_and_test arch/x86/include/asm/atomic.h:67 [inline]
RIP: 0010:raw_atomic_dec_and_test include/linux/atomic/atomic-arch-fallback.h:2257 [inline]
RIP: 0010:atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1376 [inline]
RIP: 0010:do_exit+0x63c/0x2530 kernel/exit.c:843
Code: 00 74 0a 48 8b 7c 24 20 e8 31 d1 8d 00 48 8b 44 24 20 48 8b 18 48 8d 7b 04 be 04 00 00 00 e8 fb d2 8d 00 45 31 f6 f0 ff 4b 04 <0f> 95 c3 41 0f 94 c6 bf 02 00 00 00 44 89 f6 e8 60 50 35 00 84 db
RSP: 0018:ffffc9000471fac0 EFLAGS: 00000202
RAX: ffff88802bba8901 RBX: ffff888029406c00 RCX: ffffffff81522435
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888029406c04
RBP: ffffc9000471fc30 R08: ffff888029406c07 R09: 1ffff11005280d80
R10: dffffc0000000000 R11: ffffed1005280d81 R12: 1ffff11005775005
R13: 0000000000000009 R14: 0000000000000000 R15: dffffc0000000000
do_group_exit+0x22d/0x2f0 kernel/exit.c:1032
get_signal+0x12a6/0x1390 kernel/signal.c:2911
arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/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:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f456199e0d9
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:00007f45628120e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffff5 RBX: 00007f4561c25fa8 RCX: 00007f456199e0d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f4561c25fa8
RBP: 00007f4561c25fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4561c26038 R14: 00007fff50b60500 R15: 00007fff50b605e8