rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P9965/1:b..l P9969/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=50181, q=499 ncpus=2)
task:cmp state:R running task stack:23680 pid:9969 tgid:9969 ppid:9933 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 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:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:206
Code: 8b 3d 3c 8d 45 0c 48 89 de 5b e9 33 38 5a 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 c0 d4 03 00 65 8b 15 20 af 6d 7e f7 c2 00 01 ff 00
RSP: 0018:ffffc90011a9f4d8 EFLAGS: 00000246
RAX: ffffffff82148b4e RBX: 000000006678046e RCX: ffff888022dd8000
RDX: ffff888022dd8000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffc90011a9f5a0 R08: ffffffff82148b39 R09: 1ffffffff1f5a99d
R10: dffffc0000000000 R11: fffffbfff1f5a99e R12: 1ffff92002353ea0
R13: ffffffff80000000 R14: dffffc0000000000 R15: 0000000000000001
timestamp_truncate fs/inode.c:2473 [inline]
current_time+0x1be/0x2b0 fs/inode.c:2500
atime_needs_update+0x32d/0x660 fs/inode.c:1958
pick_link+0x458/0xd50 fs/namei.c:1787
step_into+0xca9/0x1080 fs/namei.c:1874
walk_component fs/namei.c:2010 [inline]
link_path_walk+0x748/0xea0 fs/namei.c:2331
path_openat+0x24a/0x3280 fs/namei.c:3803
do_filp_open+0x235/0x490 fs/namei.c:3834
do_sys_openat2+0x13e/0x1d0 fs/open.c:1405
do_sys_open fs/open.c:1420 [inline]
__do_sys_openat fs/open.c:1436 [inline]
__se_sys_openat fs/open.c:1431 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1431
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: 0033:0x7feffae89a46
RSP: 002b:00007ffcbc8e8938 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffcbc8e8b98 RCX: 00007feffae89a46
RDX: 0000000000080000 RSI: 00007ffcbc8e89b0 RDI: 00000000ffffff9c
RBP: 00007ffcbc8e89a0 R08: 0000000000080000 R09: 00007ffcbc8e89b0
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffcbc8e89b0
R13: 0000000000000005 R14: 00007ffcbc8e8b7f R15: 00000000ffffffff
task:syz-executor.0 state:R running task stack:23072 pid:9965 tgid:9941 ppid:5113 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 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:1676 [inline]
zap_pmd_range mm/memory.c:1724 [inline]
zap_pud_range mm/memory.c:1753 [inline]
zap_p4d_range mm/memory.c:1774 [inline]
unmap_page_range+0x3631/0x40f0 mm/memory.c:1795
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1885
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: 0033:0x7fe2dec7d0a9
RSP: 002b:00007fe2de7ff178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fe2dedb4058 RCX: 00007fe2dec7d0a9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe2dedb4058
RBP: 00007fe2dedb4050 R08: 00007fe2de7ff6c0 R09: 00007fe2de7ff6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe2dedb405c
R13: 000000000000006e R14: 00007ffd67a15e30 R15: 00007ffd67a15f18
rcu: rcu_preempt kthread starved for 10129 jiffies! g50181 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:26448 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 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+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/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:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.10.0-rc4-syzkaller-00301-g5f583a3162ff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:113
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 d4 03 00 48 f7 00 08 00 00 00 75 10 eb 07 0f 00 2d 95 6c a3 00 f3 0f 1e fa fb f4 e9 d4 33 2a 00 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7d08 EFLAGS: 00000246
RAX: ffff888017ae0000 RBX: ffff8880182ed064 RCX: 0000000000b44901
RDX: 0000000000000001 RSI: ffff8880182ed000 RDI: ffff8880182ed064
RBP: 000000000003a578 R08: ffff8880b9537ccb R09: 1ffff110172a6f99
R10: dffffc0000000000 R11: ffffffff8b8608e0 R12: ffff88801a3fd800
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8eacdcc0
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32e38000 CR3: 0000000079e6c000 CR4: 0000000000350ef0
Call Trace:
acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707
cpuidle_enter_state+0x114/0x480 drivers/cpuidle/cpuidle.c:267
cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x375/0x5d0 kernel/sched/idle.c:332
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:430
start_secondary+0x100/0x100 arch/x86/kernel/smpboot.c:313
common_startup_64+0x13e/0x147