rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P14707/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=97577, q=102 ncpus=2)
task:syz.0.1682 state:R running task stack:22920 pid:14707 ppid:9638 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:save_stack+0x7e/0x1f0 mm/page_owner.c:124
Code: e6 81 4c 8d 6c 24 20 49 c1 ed 03 43 c7 44 25 00 f1 f1 f1 f1 43 c7 44 25 14 f3 f3 f3 f3 e8 3a 6d 9f ff 65 48 8b 1d 32 92 1d 7e <48> 81 c3 70 05 00 00 49 89 df 49 c1 ef 03 43 0f b6 04 27 84 c0 0f
RSP: 0018:ffffc90003457020 EFLAGS: 00000293
RAX: ffffffff81e62386 RBX: ffff888020d48000 RCX: ffff888020d48000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000002800
RBP: ffffc90003457150 R08: dffffc0000000000 R09: 1ffffffff21b28a0
R10: dffffc0000000000 R11: fffffbfff21b28a1 R12: dffffc0000000000
R13: 1ffff9200068ae08 R14: 0000000000000000 R15: ffff88801a40ff60
__reset_page_owner+0x4e/0x190 mm/page_owner.c:149
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1154 [inline]
free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336
free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2475
release_pages+0x1fa0/0x2220 mm/swap.c:1022
__folio_batch_release+0x71/0xe0 mm/swap.c:1042
folio_batch_release include/linux/pagevec.h:83 [inline]
shmem_undo_range+0x5d0/0x1a40 mm/shmem.c:1026
shmem_truncate_range mm/shmem.c:1135 [inline]
shmem_evict_inode+0x273/0xa70 mm/shmem.c:1264
evict+0x486/0x870 fs/inode.c:705
__dentry_kill+0x431/0x650 fs/dcache.c:611
dentry_kill+0xb8/0x290 fs/dcache.c:-1
dput+0xfe/0x1e0 fs/dcache.c:918
__fput+0x5e5/0x970 fs/file_table.c:392
task_work_run+0x1ce/0x250 kernel/task_work.c:239
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0x90b/0x23c0 kernel/exit.c:883
do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
get_signal+0x12fc/0x1400 kernel/signal.c:2902
arch_do_signal_or_restart+0x9c/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:315
exc_page_fault+0x8f/0x110 arch/x86/mm/fault.c:1524
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7efeccb8f751
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007efeccde6090 RCX: 00007efeccb8f749
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007efeccc13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007efeccde6128 R14: 00007efeccde6090 R15: 00007ffcb8ffc388
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g97577 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=56796
rcu: rcu_preempt kthread starved for 10502 jiffies! g97577 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27752 pid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
schedule_timeout+0x160/0x280 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1866
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
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: 14904 Comm: modprobe Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:122 [inline]
RIP: 0010:lock_release+0x111/0x8b0 kernel/locking/lockdep.c:5767
Code: 65 8b 05 2a 0e 9b 7e 85 c0 0f 85 7d 04 00 00 65 4c 8b 35 f2 39 9c 7e 49 8d 9e dc 0a 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 <84> c0 0f 85 20 05 00 00 83 3b 00 0f 85 51 04 00 00 4c 89 74 24 10
RSP: 0018:ffffc900001f0b40 EFLAGS: 00000803
RAX: 0000000000000000 RBX: ffff88802d3ae4dc RCX: fd20fb9155851800
RDX: 0000000000000000 RSI: ffffffff8afc6f60 RDI: ffffffff8afc6f20
RBP: ffffc900001f0c50 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: ffffffff88965080
R13: dffffc0000000000 R14: ffff88802d3ada00 R15: 1ffff9200003e174
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2461a7 CR3: 000000005fa0e000 CR4: 00000000003526e0
Call Trace:
__raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
_raw_spin_unlock+0x16/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
advance_sched+0x9a0/0xc80 net/sched/sch_taprio.c:997
__run_hrtimer kernel/time/hrtimer.c:1750 [inline]
__hrtimer_run_queues+0x51e/0xc40 kernel/time/hrtimer.c:1814
hrtimer_interrupt+0x3c9/0x9c0 kernel/time/hrtimer.c:1876
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
__sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:mas_find_setup+0x46f/0x590 lib/maple_tree.c:5965
Code: 8d 63 10 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 10 4c 89 e7 48 89 0c 24 e8 be 2b 88 f7 48 8b 0c 24 49 89 0c 24 4c 8b 64 24 18 <4c> 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 9b 2b 88 f7
RSP: 0018:ffffc9000430f720 EFLAGS: 00000293
RAX: ffffffff8a54d361 RBX: ffffc9000430f860 RCX: ffff88802d3ada00
RDX: 0000000000000000 RSI: ffffffff8e3209e0 RDI: ffff88801f72ec0c
RBP: 0000000000000000 R08: ffff88802d3ada00 R09: 0000000000000003
R10: 0000000000000009 R11: 0000000000000000 R12: ffffc9000430f778
R13: dffffc0000000000 R14: 1ffff92000861f0f R15: ffffc9000430f878
mas_find+0x3a/0x90 lib/maple_tree.c:6006
vma_next include/linux/mm.h:967 [inline]
shift_arg_pages fs/exec.c:699 [inline]
setup_arg_pages+0x824/0xed0 fs/exec.c:836
load_elf_binary+0xb98/0x2700 fs/binfmt_elf.c:1045
search_binary_handler fs/exec.c:1775 [inline]
exec_binprm fs/exec.c:1817 [inline]
bprm_execve+0xaeb/0x16f0 fs/exec.c:1892
kernel_execve+0x8bd/0x9c0 fs/exec.c:2058
call_usermodehelper_exec_async+0x20b/0x350 kernel/umh.c:110
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293