rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5228/1:b..l P5215/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=6945, q=498 ncpus=2)
task:syz.0.10 state:R running task stack:25360 pid:5215 tgid:5187 ppid:5090 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5249 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6597
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6776
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6800
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x75/0x3f0 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1093 [inline]
free_unref_folios+0x103a/0x1b00 mm/page_alloc.c:2699
folios_put_refs+0x76e/0x860 mm/swap.c:1020
folio_batch_release include/linux/pagevec.h:101 [inline]
shmem_undo_range+0x6de/0x1df0 mm/shmem.c:1012
shmem_truncate_range mm/shmem.c:1121 [inline]
shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1249
evict+0x2a8/0x630 fs/inode.c:669
__dentry_kill+0x20d/0x630 fs/dcache.c:603
dput+0x19f/0x2b0 fs/dcache.c:845
__fput+0x5f8/0x8a0 fs/file_table.c:430
task_work_run+0x24f/0x310 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa27/0x28e0 kernel/exit.c:876
do_group_exit+0x207/0x2c0 kernel/exit.c:1025
get_signal+0x16a1/0x1740 kernel/signal.c:2909
arch_do_signal_or_restart+0x96/0x830 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f018fd75d39
RSP: 002b:00007f0190c14048 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: 0000000000010106 RBX: 00007f018ff04070 RCX: 00007f018fd75d39
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007f018fdf6766 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f018ff04070 R15: 00007ffc83cc3938
task:syz-executor state:R running task stack:25440 pid:5228 tgid:5228 ppid:5087 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5249 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6597
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6919
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:mt_slot lib/maple_tree.c:788 [inline]
RIP: 0010:mas_slot lib/maple_tree.c:821 [inline]
RIP: 0010:mas_validate_parent_slot lib/maple_tree.c:7400 [inline]
RIP: 0010:mt_validate+0x8f1/0x4aa0 lib/maple_tree.c:7589
Code: 48 89 4c 24 70 48 ff c8 48 89 44 24 58 4c 8b 74 24 10 45 31 ed 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 4c 89 f7 e8 75 ca 76 f6 48 8b 44 24 10 4e 8b 24 e8 e8 e7 55
RSP: 0018:ffffc900040f7700 EFLAGS: 00000246
RAX: 1ffff110039fae52 RBX: 0000000000000001 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: ffffc900040f78f0 R08: ffffffff8b834ba8 R09: fffffbfff297db50
R10: dffffc0000000000 R11: fffffbfff297db50 R12: 0000000000000000
R13: 0000000000000008 R14: ffff88801cfd7290 R15: ffff88801cfd740c
validate_mm+0xe7/0x530 mm/mmap.c:329
mmap_region+0x1a61/0x2090 mm/mmap.c:3041
do_mmap+0x8ad/0xfa0 mm/mmap.c:1438
vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:576
ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1484
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: 0033:0x7f8028975d73
RSP: 002b:00007ffe5d94ca38 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000400000 RCX: 00007f8028975d73
RDX: 0000000000000003 RSI: 00000000003c0000 RDI: 0000001b31a60000
RBP: 0000001b31a60000 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000032
R13: 0000000000001388 R14: 00007ffe5d94cd40 R15: 00007ffe5d94cd40
rcu: rcu_preempt kthread starved for 10330 jiffies! g6945 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:26008 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5249 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6597
__schedule_loop kernel/sched/core.c:6674 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6689
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2020
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2222
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112
sched: RT throttling activated