rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=8954/1/0x4000000000000000 softirq=43185/43202 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P13029/1:b..l P13022/2:b..l P63/1:b..l P5877/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=39893, q=167 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5826 Comm: syz-executor Not tainted 6.14.0-syzkaller-11270-g08733088b566 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:should_restart_cycle net/sched/sch_taprio.c:869 [inline]
RIP: 0010:advance_sched+0x2ae/0xca0 net/sched/sch_taprio.c:948
Code: 3c 08 00 74 08 48 89 ef e8 5f 55 0d f8 48 8b 6d 00 4c 89 ef 48 89 ee e8 f0 cd a6 f7 49 39 ed 0f 84 42 09 00 00 48 89 5c 24 30 <49> 81 c7 40 01 00 00 48 8b 04 24 4c 8d b0 10 01 00 00 4c 89 f8 48
RSP: 0018:ffffc90000a08c70 EFLAGS: 00000006
RAX: 0000000000010000 RBX: ffff8880328ec550 RCX: ffff888079273c00
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 183b0e8210000000
RBP: 0000000000000000 R08: ffffffff8a1ca270 R09: fffff5200014117c
R10: dffffc0000000000 R11: fffff5200014117c R12: 0000000000000002
R13: 183b0e8210000000 R14: ffff88807ef3f330 R15: ffff8880328ec400
FS: 0000555573bd1500(0000) GS:ffff8881250e2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 0000000060afc000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000010000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__run_hrtimer kernel/time/hrtimer.c:1791 [inline]
__hrtimer_run_queues+0x5a6/0xd40 kernel/time/hrtimer.c:1855
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1917
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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd9/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 2b 00 74 08 4c 89 f7 e8 9d fe 00 f6 f6 44 24 21 02 75 55 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 92 88 67 f5 65 8b 05 eb e6 3a 07 85 c0 74 46 48 c7 04 24 0e 36
RSP: 0018:ffffc90003f7fb60 EFLAGS: 00000206
RAX: 9774f4d9c5666a00 RBX: 1ffff920007eff70 RCX: ffffffff81cb5e2c
RDX: 0000000000000000 RSI: ffffffff8e67ef5e RDI: 0000000000000001
RBP: ffffc90003f7fbf0 R08: ffffffff905e4c77 R09: 1ffffffff20bc98e
R10: dffffc0000000000 R11: fffffbfff20bc98f R12: 1ffff920007eff6c
R13: dffffc0000000000 R14: ffffc90003f7fb80 R15: 0000000000000246
__debug_object_init+0x284/0x480 lib/debugobjects.c:755
debug_hrtimer_init_on_stack kernel/time/hrtimer.c:439 [inline]
debug_init_on_stack kernel/time/hrtimer.c:479 [inline]
hrtimer_setup_sleeper_on_stack kernel/time/hrtimer.c:2098 [inline]
hrtimer_nanosleep+0xb2/0x410 kernel/time/hrtimer.c:2176
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1407 [inline]
__se_sys_clock_nanosleep+0x360/0x3c0 kernel/time/posix-timers.c:1384
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f41053bfa25
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffee61d9900 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00000000000004ef RCX: 00007f41053bfa25
RDX: 00007ffee61d9940 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffee61d99ac R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000001388
R13: 00000000000927c0 R14: 0000000000107d26 R15: 00007ffee61d9a00
task:kworker/0:4 state:R running task stack:22576 pid:5877 tgid:5877 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: events_power_efficient gc_worker
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
preempt_schedule_irq+0xfe/0x1c0 kernel/sched/core.c:7090
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:seqcount_lockdep_reader_access+0x1e2/0x230 include/linux/seqlock.h:75
Code: f7 4d 85 ff 75 16 e8 4d 16 94 f7 eb 15 e8 46 16 94 f7 e8 e1 e7 f6 01 4d 85 ff 74 ea e8 37 16 94 f7 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 66 43 c7 44 25 09 00 00 43 c6 44 25 0b
RSP: 0018:ffffc9000472f900 EFLAGS: 00000293
RAX: ffffffff8a2f57c9 RBX: 0000000000000000 RCX: ffff88801e790000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000472f9b0 R08: ffffffff8a2f579f R09: 1ffffffff20bc98e
R10: dffffc0000000000 R11: fffffbfff20bc98f R12: 1ffff920008e5f20
R13: dffffc0000000000 R14: 0000000000000046 R15: 0000000000000200
nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:333 [inline]
gc_worker+0x31b/0x1420 net/netfilter/nf_conntrack_core.c:1534
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd50 kernel/workqueue.c:3400
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:kworker/u8:4 state:R running task stack:20816 pid:63 tgid:63 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
preempt_schedule_notrace+0x103/0x140 kernel/sched/core.c:7040
preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13
rcu_is_watching+0x7e/0xb0 kernel/rcu/tree.c:737
trace_lock_acquire include/trace/events/lock.h:24 [inline]
lock_acquire+0x5e/0x2f0 kernel/locking/lockdep.c:5829
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xec/0x610 net/batman-adv/network-coding.c:719
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd50 kernel/workqueue.c:3400
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:syz.1.1551 state:R running task stack:25536 pid:13022 tgid:13022 ppid:5826 task_flags:0x400040 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
preempt_schedule_irq+0xfe/0x1c0 kernel/sched/core.c:7090
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:unwind_next_frame+0x548/0x23b0 arch/x86/kernel/unwind_orc.c:512
Code: c0 0f 85 1d 17 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 4c 8b b4 24 80 00 00 00 0f 85 21 17 00 00 41 0f b7 1f c1 eb 0b <80> e3 01 48 8b 44 24 20 42 0f b6 04 28 84 c0 0f 85 24 17 00 00 48
RSP: 0018:ffffc9000ef27028 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff907a416c
RDX: ffffffff90f6434c RSI: ffffffff8ca0bde0 RDI: ffffffff8ca0bda0
RBP: ffffffff90f6434c R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc9000ef27100
R13: dffffc0000000000 R14: ffffc9000ef27138 R15: ffffffff90f64350
arch_stack_walk+0x11e/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122
save_stack+0xfc/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x79/0x440 mm/page_owner.c:303
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1130 [inline]
__free_frozen_pages+0xd7c/0x1020 mm/page_alloc.c:2707
discard_slab mm/slub.c:2707 [inline]
__put_partials+0x160/0x1c0 mm/slub.c:3176
put_cpu_partial+0x17e/0x250 mm/slub.c:3251
__slab_free+0x294/0x390 mm/slub.c:4503
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4138 [inline]
slab_alloc_node mm/slub.c:4187 [inline]
kmem_cache_alloc_noprof+0x1e1/0x390 mm/slub.c:4194
mt_alloc_one lib/maple_tree.c:176 [inline]
mas_alloc_nodes+0x25b/0x7e0 lib/maple_tree.c:1253
mas_node_count_gfp lib/maple_tree.c:1335 [inline]
mas_preallocate+0x5ea/0x950 lib/maple_tree.c:5505
vma_iter_prealloc mm/vma.h:353 [inline]
__split_vma+0x2fe/0xc00 mm/vma.c:479
split_vma mm/vma.c:542 [inline]
vma_modify+0x193/0x390 mm/vma.c:1525
vma_modify_flags+0x3a7/0x430 mm/vma.c:1551
mprotect_fixup+0x4a3/0xb00 mm/mprotect.c:666
do_mprotect_pkey+0x99f/0xde0 mm/mprotect.c:840
__do_sys_mprotect mm/mprotect.c:861 [inline]
__se_sys_mprotect mm/mprotect.c:858 [inline]
__x64_sys_mprotect+0x80/0x90 mm/mprotect.c:858
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f410538d227
RSP: 002b:00007ffee61d9588 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007f41061136c0 RCX: 00007f410538d227
RDX: 0000000000000003 RSI: 0000000000020000 RDI: 00007f41060f4000
RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000021000 R11: 0000000000000206 R12: 00007ffee61d96e0
R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000
task:syz.4.1550 state:R running task stack:25936 pid:13029 tgid:13029 ppid:5829 task_flags:0x400040 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6947
preempt_schedule+0xe4/0xf0 kernel/sched/core.c:6971
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
wp_page_copy mm/memory.c:3545 [inline]
do_wp_page+0x1e1a/0x49b0 mm/memory.c:3836
handle_pte_fault mm/memory.c:5906 [inline]
__handle_mm_fault+0x2305/0x6ef0 mm/memory.c:6033
handle_mm_fault+0x2dd/0x800 mm/memory.c:6202
do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x45b/0x8b0 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7ff15a64c9fc
RSP: 002b:00007ffda8401ac8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00007ff15b4d5720 RCX: 0000000000000000
RDX: 0000000000001275 RSI: ffffffff81d51275 RDI: 0000000000000000
RBP: ffffffff81d51275 R08: 00007ff15a990000 R09: 00007ff15a992000
R10: 0000000081d51279 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff81d518f3 R15: 0000000000000001
rcu: rcu_preempt kthread starved for 10502 jiffies! g39893 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:26952 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_timeout+0x15b/0x2b0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2e1/0x1340 kernel/rcu/tree.c:2046
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2248
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 10548 Comm: kworker/u8:7 Not tainted 6.14.0-syzkaller-11270-g08733088b566 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x1bac/0x2d40 kernel/smp.c:885
Code: 03 84 c0 75 7e 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 48 02 0c 00 41 83 e4 01 4c 8b 64 24 68 75 07 e8 f8 fd 0b 00 eb 41 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 11 41 f7 45 00
RSP: 0018:ffffc9000becf640 EFLAGS: 00000293
RAX: ffffffff81b7702d RBX: 1ffff110170e7e61 RCX: ffff88804d995a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000becf840 R08: ffffffff81b76ff8 R09: 1ffffffff20bc98e
R10: dffffc0000000000 R11: fffffbfff20bc98f R12: ffff8880b863ab88
R13: ffff8880b873f308 R14: ffff8880b863ab80 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff888124fe2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f47d373e733 CR3: 000000000eb38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2455 [inline]
text_poke_bp_batch+0x354/0xb30 arch/x86/kernel/alternative.c:2665
text_poke_flush arch/x86/kernel/alternative.c:2856 [inline]
text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2863
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_disable_cpuslocked+0xd2/0x1c0 kernel/jump_label.c:240
static_key_disable+0x1a/0x20 kernel/jump_label.c:248
toggle_allocation_gate+0x1b1/0x250 mm/kfence/core.c:855
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd50 kernel/workqueue.c:3400
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245