rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8033/1:b..l P8018/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=30277, q=675 ncpus=2)
task:syz-executor.1 state:R running task stack:24160 pid:8018 tgid:8017 ppid:7593 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 kernel/sched/core.c:6745
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
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:lock_release+0x630/0x9f0 kernel/locking/lockdep.c:5778
Code: 3c 3b 00 74 08 4c 89 f7 e8 ed 0b 86 00 f6 84 24 91 00 00 00 02 75 77 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900098ef640 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200131deda RCX: ffffc900098ef603
RDX: 0000000000000002 RSI: ffffffff8bcacd00 RDI: ffffffff8c1f1fc0
RBP: ffffc900098ef778 R08: ffffffff8fac1aaf R09: 1ffffffff1f58355
R10: dffffc0000000000 R11: fffffbfff1f58356 R12: 1ffff9200131ded4
R13: 0000000000000246 R14: ffffc900098ef6d0 R15: dffffc0000000000
rcu_lock_release include/linux/rcupdate.h:339 [inline]
rcu_read_unlock include/linux/rcupdate.h:812 [inline]
get_mem_cgroup_from_mm+0x1ad/0x2a0 mm/memcontrol.c:1271
__mem_cgroup_charge+0x16/0x80 mm/memcontrol.c:7511
mem_cgroup_charge include/linux/memcontrol.h:691 [inline]
shmem_alloc_and_add_folio+0x394/0xdb0 mm/shmem.c:1677
shmem_get_folio_gfp+0x82d/0x1f50 mm/shmem.c:2055
shmem_get_folio mm/shmem.c:2160 [inline]
shmem_write_begin+0x170/0x4d0 mm/shmem.c:2743
generic_perform_write+0x322/0x640 mm/filemap.c:4015
shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2919
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
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: 0033:0x7f3c9ec7bcaf
RSP: 002b:00007f3c9fa16e80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f3c9ec7bcaf
RDX: 0000000001000000 RSI: 00007f3c94a00000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000618a
R10: 0000000020001b02 R11: 0000000000000293 R12: 0000000000000004
R13: 00007f3c9fa16f80 R14: 00007f3c9fa16f40 R15: 00007f3c94a00000
task:syz-executor.2 state:R running task stack:23800 pid:8033 tgid:8032 ppid:6288 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 kernel/sched/core.c:6745
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
preempt_schedule_thunk+0x1a/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]
zap_pte_range mm/memory.c:1682 [inline]
zap_pmd_range mm/memory.c:1730 [inline]
zap_pud_range mm/memory.c:1759 [inline]
zap_p4d_range mm/memory.c:1780 [inline]
unmap_page_range+0x4206/0x4d00 mm/memory.c:1801
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1891
exit_mmap+0x264/0xc80 mm/mmap.c:3341
__mmput+0x115/0x3c0 kernel/fork.c:1346
exit_mm+0x220/0x310 kernel/exit.c:565
do_exit+0x9aa/0x27e0 kernel/exit.c:861
do_group_exit+0x207/0x2c0 kernel/exit.c:1023
get_signal+0x16a1/0x1740 kernel/signal.c:2909
arch_do_signal_or_restart+0x96/0x860 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: 0033:0x7fb21587cf69
RSP: 002b:00007fb216635178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fb2159b3f88 RCX: 00007fb21587cf69
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fb2159b3f8c
RBP: 00007fb2159b3f80 R08: 7fffffffffffffff R09: 00007fb2166356c0
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007fb2159b3f8c
R13: 000000000000000b R14: 00007ffe8f936a70 R15: 00007ffe8f936b58
rcu: rcu_preempt kthread starved for 10567 jiffies! g30277 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:25232 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
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:86 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112