rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=93dc/1/0x4000000000000000 softirq=12419/12426 fqs=0
rcu: 	(detected by 1, t=10504 jiffies, g=9629, q=687 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 67 Comm: kworker/u8:4 Not tainted 6.14.0-rc2-syzkaller-00157-g9593172d93b9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:taprio_set_budgets+0xd0/0x370 net/sched/sch_taprio.c:664
Code: 08 84 c0 0f 85 97 02 00 00 0f b7 1b 31 ff 89 de e8 65 7a bd f7 66 85 db 0f 8e 6a 02 00 00 49 81 c7 30 01 00 00 48 83 04 24 20 <48> 8d 04 9d fc ff ff ff 48 89 44 24 20 4c 89 fb 45 31 e4 4c 89 f8
RSP: 0018:ffffc90000007c10 EFLAGS: 00000082
RAX: 0000000000010000 RBX: 0000000000000002 RCX: dffffc0000000000
RDX: ffff88801b70bc00 RSI: 0000000000000002 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff8a04409b R09: fffff52000000f7c
R10: dffffc0000000000 R11: fffff52000000f7c R12: dffffc0000000000
R13: ffff888012ff5c08 R14: ffff888012ff5c00 R15: ffff888012ff5930
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5bf58666c0 CR3: 0000000029054000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 advance_sched+0x98d/0xca0 net/sched/sch_taprio.c:977
 __run_hrtimer kernel/time/hrtimer.c:1801 [inline]
 __hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_count_sub+0x66/0x170 kernel/sched/core.c:5895
Code: c1 81 e1 ff ff ff 7f 39 d9 7c 27 81 fb fe 00 00 00 77 07 0f b6 c0 85 c0 74 5f 65 8b 05 7b 74 74 7e f7 db 65 01 1d 72 74 74 7e <5b> 41 5e c3 cc cc cc cc 90 e8 cc 3e 62 03 85 c0 74 3a 48 c7 c0 14
RSP: 0018:ffffc9000213e858 EFLAGS: 00000293
RAX: 0000000080000202 RBX: 00000000ffffffff RCX: 0000000000000202
RDX: dffffc0000000000 RSI: ffffc90002138000 RDI: 0000000000000001
RBP: ffffc9000213e940 R08: ffffc9000213fe30 R09: 0000000000000000
R10: ffffc9000213e990 R11: fffff52000427d34 R12: dffffc0000000000
R13: ffffc9000213e940 R14: dffffc0000000000 R15: ffffc9000213fe40
 unwind_next_frame+0x18e6/0x22d0 arch/x86/kernel/unwind_orc.c:672
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2353 [inline]
 slab_free mm/slub.c:4609 [inline]
 kfree+0x196/0x430 mm/slub.c:4757
 ieee80211_inform_bss+0xbf4/0x10d0 net/mac80211/scan.c:160
 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline]
 cfg80211_inform_single_bss_data+0xf63/0x1ee0 net/wireless/scan.c:2367
 cfg80211_inform_bss_data+0x3c3/0x5820 net/wireless/scan.c:3222
 cfg80211_inform_bss_frame_data+0x3bb/0x720 net/wireless/scan.c:3317
 ieee80211_bss_info_update+0x8a7/0xbc0 net/mac80211/scan.c:226
 ieee80211_rx_bss_info net/mac80211/ibss.c:1102 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1581 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x1993/0x2e00 net/mac80211/ibss.c:1608
 ieee80211_iface_process_skb net/mac80211/iface.c:1611 [inline]
 ieee80211_iface_work+0x8dc/0xf90 net/mac80211/iface.c:1665
 cfg80211_wiphy_work+0x2f0/0x490 net/wireless/core.c:435
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317
 worker_thread+0x870/0xd30 kernel/workqueue.c:3398
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.906 msecs
rcu: rcu_preempt kthread starved for 10504 jiffies! g9629 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:26032 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 5210 Comm: udevd Not tainted 6.14.0-rc2-syzkaller-00157-g9593172d93b9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:kvm_wait+0x250/0x2c0 arch/x86/kernel/kvm.c:1064
Code: 3b 45 0f b6 f6 44 89 ff 44 89 f6 e8 3a 53 55 00 e8 a5 1c 5d 00 45 38 f7 75 15 66 90 e8 a9 52 55 00 0f 00 2d a2 a4 bb 0a fb f4 <e9> 50 fe ff ff e8 96 52 55 00 fb e9 45 fe ff ff 89 d9 80 e1 07 38
RSP: 0018:ffffc90000a17d40 EFLAGS: 00000246
RAX: ffffffff816c64b7 RBX: ffff888068490150 RCX: ffff88807ccd9e00
RDX: 0000000000000100 RSI: ffffffff8c2aa420 RDI: ffffffff8c80ec80
RBP: ffffc90000a17e10 R08: ffffffff94544917 R09: 1ffffffff28a8922
R10: dffffc0000000000 R11: fffffbfff28a8923 R12: 1ffff92000142fac
R13: dffffc0000000000 R14: 0000000000000003 R15: 0000000000000003
FS:  00007f5091744c80(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f36fa9ce440 CR3: 0000000034e34000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 pv_wait arch/x86/include/asm/paravirt.h:589 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:466 [inline]
 __pv_queued_spin_lock_slowpath+0x8d0/0xdb0 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:577 [inline]
 queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x272/0x370 kernel/locking/spinlock_debug.c:116
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 cfg80211_inform_single_bss_data+0xdea/0x1ee0 net/wireless/scan.c:2362
 cfg80211_inform_bss_data+0x3c3/0x5820 net/wireless/scan.c:3222
 cfg80211_inform_bss_frame_data+0x3bb/0x720 net/wireless/scan.c:3317
 ieee80211_bss_info_update+0x8a7/0xbc0 net/mac80211/scan.c:226
 ieee80211_scan_rx+0x526/0x9c0 net/mac80211/scan.c:340
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5246 [inline]
 ieee80211_rx_list+0x2cc0/0x38f0 net/mac80211/rx.c:5483
 ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5506
 ieee80211_rx include/net/mac80211.h:5172 [inline]
 ieee80211_handle_queued_frames+0xe7/0x1e0 net/mac80211/main.c:441
 tasklet_action_common+0x426/0x620 kernel/softirq.c:811
 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
 __do_softirq kernel/softirq.c:595 [inline]
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:arch_stack_walk+0x123/0x150 arch/x86/kernel/stacktrace.c:24
Code: 33 a4 09 00 48 85 c0 74 23 4c 89 f7 48 89 c6 4d 89 eb 41 ff d3 66 90 84 c0 74 11 48 89 df e8 64 a5 09 00 83 bd 70 ff ff ff 00 <75> d0 65 48 8b 04 25 28 00 00 00 48 3b 45 d0 75 13 48 83 c4 68 5b
RSP: 0018:ffffc90003096d80 EFLAGS: 00000202
RAX: 0000000080000001 RBX: ffffc90003096d80 RCX: 0000000080000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90003096e10 R08: ffffc90003096ddf R09: 0000000000000000
R10: ffffc90003096dd0 R11: fffff52000612dbc R12: ffff88807ccd9e00
R13: ffffffff81ad4610 R14: ffffc90003096e60 R15: 0000000000000000
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171
 ptlock_alloc+0x20/0x70 mm/memory.c:7044
 ptlock_init include/linux/mm.h:2972 [inline]
 pagetable_pte_ctor include/linux/mm.h:3020 [inline]
 __pte_alloc_one_noprof include/asm-generic/pgalloc.h:73 [inline]
 pte_alloc_one+0x73/0x160 arch/x86/mm/pgtable.c:44
 __pte_alloc+0x79/0x220 mm/memory.c:447
 copy_pte_range mm/memory.c:1107 [inline]
 copy_pmd_range+0x6fc8/0x77b0 mm/memory.c:1262
 copy_pud_range mm/memory.c:1299 [inline]
 copy_p4d_range mm/memory.c:1323 [inline]
 copy_page_range+0x99f/0xe90 mm/memory.c:1421
 dup_mmap kernel/fork.c:748 [inline]
 dup_mm kernel/fork.c:1700 [inline]
 copy_mm+0x1269/0x2160 kernel/fork.c:1752
 copy_process+0x17d1/0x3cf0 kernel/fork.c:2403
 kernel_clone+0x226/0x8e0 kernel/fork.c:2815
 __do_sys_clone kernel/fork.c:2958 [inline]
 __se_sys_clone kernel/fork.c:2942 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2942
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f50912fca12
Code: 41 5d 41 5e 41 5f c3 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 e7 43 0f 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffd886734b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000562072b44301 RCX: 00007f50912fca12
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000562072b30910
R10: 00007f5091744f50 R11: 0000000000000246 R12: 0000562072b37620
R13: 0000000000000000 R14: 0000000000000000 R15: 0000562072b30910
 </TASK>
sched: DL replenish lagged too much