rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8566/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=34057, q=942 ncpus=2)
task:modprobe state:R running task stack:22880 pid:8566 tgid:8566 ppid:36 task_flags:0x400000 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1821/0x5740 kernel/sched/core.c:7189
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8b0 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:121 [inline]
RIP: 0010:lock_release+0x69/0x3c0 kernel/locking/lockdep.c:5881
Code: 05 9c 4b 8e 0e 73 0d e8 c5 f7 08 00 84 c0 0f 84 94 02 00 00 83 3d 76 7e 8e 0e 00 0f 84 1c 02 00 00 65 8b 05 39 8f 96 11 85 c0 <0f> 85 0d 02 00 00 65 4c 8b 3d 81 49 96 11 41 83 bf 8c 0b 00 00 00
RSP: 0018:ffffc90005f1e170 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff90d10501 RCX: 0000000080000001
RDX: ffffc90005f1e201 RSI: ffffffff8c28b740 RDI: ffffffff8c28b700
RBP: dffffc0000000000 R08: ffffc90005f1f270 R09: ffffc90005f1e2f8
R10: dffffc0000000000 R11: fffff52000be3c61 R12: ffffc90005f1f280
R13: ffffffff8176e256 R14: ffffffff8e95cce0 R15: ffffffff8176e256
rcu_lock_release include/linux/rcupdate.h:310 [inline]
rcu_read_unlock include/linux/rcupdate.h:869 [inline]
class_rcu_destructor include/linux/rcupdate.h:1181 [inline]
unwind_next_frame+0x1bba/0x2550 arch/x86/kernel/unwind_orc.c:709
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4570 [inline]
kmem_cache_alloc_from_sheaf_noprof+0x9f/0x180 mm/slub.c:5209
mas_pop_node lib/maple_tree.c:1065 [inline]
dst_setup+0x7e5/0x1160 lib/maple_tree.c:2350
mas_wr_split lib/maple_tree.c:3460 [inline]
mas_wr_store_entry+0x2f4e/0x7fc0 lib/maple_tree.c:3537
mas_store_prealloc+0x699/0xa20 lib/maple_tree.c:4936
vma_iter_store_new mm/vma.h:623 [inline]
vma_complete+0x21f/0x9e0 mm/vma.c:359
__split_vma+0x8fa/0xa50 mm/vma.c:569
vms_gather_munmap_vmas+0x4fa/0x1380 mm/vma.c:1448
__mmap_setup mm/vma.c:2439 [inline]
__mmap_region mm/vma.c:2753 [inline]
mmap_region+0x921/0x22a0 mm/vma.c:2857
do_mmap+0xc39/0x10c0 mm/mmap.c:560
vm_mmap_pgoff+0x2c9/0x4f0 mm/util.c:581
ksys_mmap_pgoff+0x51e/0x760 mm/mmap.c:606
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0f4a9e2242
RSP: 002b:00007ffe02fb86f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f0f4a6f8000 RCX: 00007f0f4a9e2242
RDX: 0000000000000003 RSI: 0000000000002000 RDI: 00007f0f4a6f8000
RBP: 0000000000000812 R08: 0000000000000000 R09: 000000000000d000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffe02fb87b8
R13: 00007f0f4a9b7580 R14: 00007ffe02fb8b70 R15: 00000fffc05f70e2
rcu: rcu_preempt kthread starved for 10460 jiffies! g34057 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:27544 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1821/0x5740 kernel/sched/core.c:7189
__schedule_loop kernel/sched/core.c:7268 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7283
schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
kthread+0x389/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
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: 1124 Comm: kworker/u8:10 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0xfd4/0x13d0 kernel/smp.c:892
Code: 89 ee 83 e6 01 31 ff e8 9a 07 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 45 03 0c 00 eb 37 f3 90 43 0f b6 04 2c <84> c0 75 10 41 f7 06 01 00 00 00 74 1e e8 2a 03 0c 00 eb e5 44 89
RSP: 0018:ffffc900059e7700 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b863c188 RCX: ffff888028db9f00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900059e7840 R08: ffffffff903021f7 R09: 1ffffffff206043e
R10: dffffc0000000000 R11: fffffbfff206043f R12: 1ffff110170e8171
R13: dffffc0000000000 R14: ffff8880b8740b88 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff88812529e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd98c667d58 CR3: 000000000e74a000 CR4: 0000000000350ef0
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1057
on_each_cpu include/linux/smp.h:72 [inline]
smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2773 [inline]
smp_text_poke_batch_finish+0x5f5/0x1160 arch/x86/kernel/alternative.c:2983
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x128/0x240 kernel/jump_label.c:210
static_key_enable+0x1a/0x20 kernel/jump_label.c:223
toggle_allocation_gate+0xab/0x290 mm/kfence/core.c:906
process_one_work kernel/workqueue.c:3314 [inline]
process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3397
worker_thread+0xa53/0xfc0 kernel/workqueue.c:3478
kthread+0x389/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245