sched: DL replenish lagged too much
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (10495 ticks this GP) idle=b7bc/1/0x4000000000000000 softirq=16872/254559 fqs=4
rcu: (t=10500 jiffies g=11489 q=1424 ncpus=2)
rcu: rcu_preempt kthread starved for 10489 jiffies! g11489 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:27128 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2054
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2256
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 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: 6161 Comm: syz.3.66 Not tainted 6.16.0-rc3-syzkaller-ge34a79b96ab9 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:430 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x6ce/0xb60 kernel/locking/qspinlock.c:325
Code: ff ff 66 c7 84 24 90 00 00 00 00 01 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 20 0f b6 04 01 84 c0 75 46 80 3b 00 74 09 f3 90 <41> ff c6 75 d3 eb 4b 48 89 df be 02 00 00 00 e8 fe 6d ba f6 48 8d
RSP: 0018:ffffc9000b6977e0 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffff8880248d4748 RCX: 1ffff1100491a8e9
RDX: 0000000000000000 RSI: ffffffff8d982385 RDI: ffff8880b873af14
RBP: ffffc9000b6978f8 R08: ffffffff8fa10cf7 R09: 1ffffffff1f4219e
R10: dffffc0000000000 R11: fffffbfff1f4219f R12: 1ffffffff1bf52c0
R13: 0000000000000000 R14: 00000000ffffca06 R15: 1ffff1100491a8e9
FS: 000055556cdac500(0000) GS:ffff888125d50000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000033c46000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [inline]
queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock+0x21f/0x290 kernel/locking/spinlock_debug.c:116
spin_lock include/linux/spinlock.h:351 [inline]
futex_unqueue+0xf6/0x240 kernel/futex/core.c:937
__futex_wait+0x223/0x3e0 kernel/futex/waitwake.c:690
futex_wait+0x104/0x360 kernel/futex/waitwake.c:715
do_futex+0x333/0x420 kernel/futex/syscalls.c:102
__do_sys_futex kernel/futex/syscalls.c:179 [inline]
__se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:160
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efdbf58e929
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:00007ffd14e2bea8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 0000000000019dfa RCX: 00007efdbf58e929
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007efdbf7b5fac
RBP: 0000000000000032 R08: 7fffffffffffffff R09: 0000000514e2c19f
R10: 00007ffd14e2bfa0 R11: 0000000000000246 R12: 00007efdbf7b5fac
R13: 00007ffd14e2bfa0 R14: 0000000000019e2c R15: 00007ffd14e2bfc0
CPU: 0 UID: 0 PID: 6163 Comm: syz.3.66 Not tainted 6.16.0-rc3-syzkaller-ge34a79b96ab9 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:check_preemption_disabled+0x17/0x120 lib/smp_processor_id.c:14
Code: 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 48 83 ec 10 65 48 8b 05 3e 2e 36 07 48 89 44 24 08 <65> 8b 05 46 2e 36 07 65 8b 0d 3b 2e 36 07 f7 c1 ff ff ff 7f 74 23
RSP: 0018:ffffc900000063b8 EFLAGS: 00000286
RAX: eb202c7af14c0300 RBX: 0000000000000001 RCX: 0000000000000100
RDX: ffff888066a2da00 RSI: ffffffff8be28d20 RDI: ffffffff8be28ce0
RBP: ffffc90000006590 R08: ffffc90000006517 R09: 0000000000000000
R10: ffffc90000006500 R11: fffff52000000ca3 R12: ffffc900000065e0
R13: dffffc0000000000 R14: ffff8880292bf6c0 R15: 1ffff92000000c94
FS: 00007efdc03416c0(0000) GS:ffff888125c50000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000033c46000 CR4: 00000000003526f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:745
rcu_read_unlock+0x1f/0xa0 include/linux/rcupdate.h:869
__perf_output_begin kernel/events/ring_buffer.c:268 [inline]
perf_output_begin_forward+0x9bc/0xa80 kernel/events/ring_buffer.c:277
__perf_event_output kernel/events/core.c:8459 [inline]
perf_event_output_forward+0x2b2/0x430 kernel/events/core.c:8477
__perf_event_overflow+0x7cc/0xe10 kernel/events/core.c:10352
perf_swevent_overflow kernel/events/core.c:10427 [inline]
perf_swevent_event+0x2f4/0x5e0 kernel/events/core.c:-1
perf_tp_event+0x4f6/0x1380 kernel/events/core.c:10972
perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:10896
do_perf_trace_lock include/trace/events/lock.h:50 [inline]
perf_trace_lock+0x2f8/0x3b0 include/trace/events/lock.h:50
__do_trace_lock_release include/trace/events/lock.h:69 [inline]
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5882
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+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4328 [inline]
__kmalloc_noprof+0x27a/0x4f0 mm/slub.c:4340
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
cfg80211_inform_single_bss_data+0x905/0x1ac0 net/wireless/scan.c:2339
cfg80211_inform_bss_data+0x1fb/0x3b20 net/wireless/scan.c:3222
cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3313
ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226
ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355
__ieee80211_rx_handle_packet net/mac80211/rx.c:5183 [inline]
ieee80211_rx_list+0x22fc/0x2d80 net/mac80211/rx.c:5420
ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5443
ieee80211_rx include/net/mac80211.h:5185 [inline]
ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:441
tasklet_action_common+0x36c/0x580 kernel/softirq.c:829
handle_softirqs+0x286/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
RIP: 0010:futex_wake+0x214/0x560 kernel/futex/waitwake.c:180
Code: 02 00 00 4c 89 74 24 20 c7 44 24 0c 00 00 00 00 48 89 5c 24 10 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 4c 89 ff e8 72 71 6f 00 4d 8b 2f 4d 89 fc 49 83 c4 30 0f 84
RSP: 0018:ffffc9000b63fbe0 EFLAGS: 00000246
RAX: 1ffff920016d2f57 RBX: ffff8880248d4788 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc9000b63fb60
RBP: ffffc9000b63fcf0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520016c7f6c R12: 00000000000f4240
R13: 0000000000000000 R14: ffff8880248d4740 R15: ffffc9000b697ab8
do_futex+0x395/0x420 kernel/futex/syscalls.c:107
__do_sys_futex kernel/futex/syscalls.c:179 [inline]
__se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:160
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efdbf58e929
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:00007efdc03410e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007efdbf7b5fa8 RCX: 00007efdbf58e929
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007efdbf7b5fac
RBP: 00007efdbf7b5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000246 R12: 00007efdbf7b5fac
R13: 0000000000000000 R14: 00007ffd14e2bc60 R15: 00007ffd14e2bd48