rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5772/1:b.el
(detected by 0, t=10502 jiffies, g=18017, q=823 ncpus=2)
task:syz.0.488 state:R running task stack:23768 pid:5772 ppid:4271 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5246 [inline]
__schedule+0x107f/0x4030 kernel/sched/core.c:6563
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6732
preempt_schedule+0xbc/0xd0 kernel/sched/core.c:6756
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
__local_bh_enable_ip+0x147/0x1c0 kernel/softirq.c:428
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:861 [inline]
__dev_queue_xmit+0x1d84/0x3810 net/core/dev.c:4411
dev_queue_xmit include/linux/netdevice.h:3053 [inline]
__bpf_tx_skb net/core/filter.c:2143 [inline]
__bpf_redirect_common net/core/filter.c:2191 [inline]
__bpf_redirect+0xb65/0x1110 net/core/filter.c:2198
____bpf_clone_redirect net/core/filter.c:2482 [inline]
bpf_clone_redirect+0x311/0x4a0 net/core/filter.c:2445
bpf_prog_64c546ab742f56d2+0x19/0x1d
bpf_dispatcher_nop_func include/linux/bpf.h:1012 [inline]
__bpf_prog_run include/linux/filter.h:608 [inline]
bpf_prog_run include/linux/filter.h:615 [inline]
bpf_test_run+0x2b6/0x830 net/bpf/test_run.c:402
bpf_prog_test_run_skb+0xdaf/0x18e0 net/bpf/test_run.c:1222
bpf_prog_test_run+0x31c/0x390 kernel/bpf/syscall.c:3695
__sys_bpf+0x62b/0x780 kernel/bpf/syscall.c:5050
__do_sys_bpf kernel/bpf/syscall.c:5136 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5134 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5134
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f56b5b9e159
RSP: 002b:00007f56b6996028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f56b5e25fa0 RCX: 00007f56b5b9e159
RDX: 0000000000000050 RSI: 00002000000001c0 RDI: 000000000000000a
RBP: 00007f56b5c35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f56b5e26038 R14: 00007f56b5e25fa0 R15: 00007ffff4b7f3a8
rcu: rcu_preempt kthread starved for 10352 jiffies! g18017 f0x0 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:27888 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5246 [inline]
__schedule+0x107f/0x4030 kernel/sched/core.c:6563
schedule+0xb9/0x180 kernel/sched/core.c:6639
schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x303/0x1350 kernel/rcu/tree.c:1706
rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5792 Comm: syz.4.491 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__kasan_check_write+0x0/0x10 mm/kasan/shadow.c:37
Code: 8c eb 0a 48 c7 c7 46 4e 46 8c 48 89 de e8 98 95 52 08 31 ed eb d7 00 00 cc cc 89 f6 48 8b 0c 24 31 d2 e9 c3 ec ff ff 0f 1f 00 <89> f6 48 8b 0c 24 ba 01 00 00 00 e9 b0 ec ff ff 55 41 56 53 48 89
RSP: 0018:ffffc900001e0498 EFLAGS: 00000056
RAX: 00000000ffffff01 RBX: ffff8880b8f2a5c0 RCX: ffffffff81654f69
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc900001e04e0
RBP: ffffc900001e0550 R08: ffff8880b8f2a5c3 R09: 1ffff110171e54b8
R10: dffffc0000000000 R11: ffffed10171e54b9 R12: 1ffff9200003c098
R13: ffff8880b8f2a5c8 R14: dffffc0000000000 R15: 1ffff110171e54b9
FS: 00007fe11c8e36c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000072fd3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:542 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
do_raw_spin_lock+0x128/0x2f0 kernel/locking/spinlock_debug.c:115
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
_raw_spin_lock_irqsave+0xbc/0x100 kernel/locking/spinlock.c:162
hrtimer_interrupt+0xf4/0x980 kernel/time/hrtimer.c:1858
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
__sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lock_acquire+0x225/0x4a0 kernel/locking/lockdep.c:5680
Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3d 04 f8 0f 85 f0 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 43 c7 44 3d 08 00 00 00 00 65 48 8b 04
RSP: 0018:ffffc900001e0800 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 57343af512d52300
RDX: 0000000000000000 RSI: ffffffff8a8c2a20 RDI: ffffffff8adf6420
RBP: ffffc900001e0920 R08: dffffc0000000000 R09: 1ffffffff2162648
R10: dffffc0000000000 R11: fffffbfff2162649 R12: 0000000000000001
R13: 1ffff9200003c10c R14: 0000000000000246 R15: dffffc0000000000
rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
rcu_read_lock include/linux/rcupdate.h:791 [inline]
sta_info_get_bss+0x68/0x320 net/mac80211/sta_info.c:231
ieee80211_rx_for_interface+0xde/0x370 net/mac80211/rx.c:5006
__ieee80211_rx_handle_packet net/mac80211/rx.c:5187 [inline]
ieee80211_rx_list+0x25fd/0x2e40 net/mac80211/rx.c:5317
ieee80211_rx_napi+0x1aa/0x3c0 net/mac80211/rx.c:5340
ieee80211_rx include/net/mac80211.h:4849 [inline]
ieee80211_handle_queued_frames+0x104/0x1a0 net/mac80211/main.c:317
tasklet_action_common+0x2d0/0x460 kernel/softirq.c:827
handle_softirqs+0x291/0x910 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:check_preemption_disabled+0x13/0x110 lib/smp_processor_id.c:13
Code: 00 cc cc 00 00 cc cc 48 c7 c7 c0 63 df 8a 48 c7 c6 00 64 df 8a eb 00 55 41 57 41 56 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 <48> 89 44 24 08 65 8b 05 d1 bc d0 75 65 8b 0d 72 12 d1 75 f7 c1 ff
RSP: 0018:ffffc900034afd00 EFLAGS: 00000286
RAX: 57343af512d52300 RBX: 0000000000000001 RCX: 0000000000000002
RDX: ffff88802bd21e00 RSI: ffffffff8adf6400 RDI: ffffffff8adf63c0
RBP: ffff888019252388 R08: dffffc0000000000 R09: 1ffffffff2162648
R10: dffffc0000000000 R11: fffffbfff2162649 R12: ffff88807aada080
R13: ffff88807aada080 R14: ffffffff81e954ec R15: 1ffff1100324a471
rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
rcu_is_watching+0x11/0xa0 kernel/rcu/tree.c:721
rcu_read_unlock_sched include/linux/rcupdate.h:902 [inline]
fd_install+0x206/0x4e0 fs/file.c:611
__do_sys_perf_event_open kernel/events/core.c:12857 [inline]
__se_sys_perf_event_open+0x1c91/0x1ec0 kernel/events/core.c:12428
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe11b99e159
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:00007fe11c8e3028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fe11bc26180 RCX: 00007fe11b99e159
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0
RBP: 00007fe11ba35024 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe11bc26218 R14: 00007fe11bc26180 R15: 00007ffdeb3ce408