rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6970/1:b..l
(detected by 0, t=10502 jiffies, g=25849, q=25)
task:syz.0.883 state:R running task stack:25304 pid: 6970 ppid: 4167 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6777
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:681
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:205
Code: 00 00 00 0f 1f 00 53 48 89 fb e8 17 00 00 00 48 8b 3d 88 f8 68 0c 48 89 de 5b e9 77 00 49 00 cc cc cc cc cc cc cc 48 8b 04 24 <65> 48 8b 0d 14 fc 81 7e 65 8b 15 15 fc 81 7e 81 e2 00 01 ff 00 74
RSP: 0018:ffffc90003716d58 EFLAGS: 00000202
RAX: ffffffff818d12ff RBX: 0000000000000001 RCX: ffff88801c3fd940
RDX: ffff88801c3fd940 RSI: ffffffff8ad90520 RDI: ffffffff8ad904e0
RBP: 000000000000bf01 R08: ffffffff818d12ed R09: fffffbfff20ec821
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88801c3fd940
R13: ffffffff816e0980 R14: 00007f85e1cd5719 R15: 1ffff920006e2dc5
rcu_read_lock include/linux/rcupdate.h:740 [inline]
is_bpf_text_address+0x3f/0x260 kernel/bpf/core.c:721
kernel_text_address kernel/extable.c:151 [inline]
__kernel_text_address+0x94/0x100 kernel/extable.c:105
unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323
arch_stack_walk+0xf3/0x140 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
save_stack+0xf6/0x1e0 mm/page_owner.c:119
__set_page_owner+0x37/0x300 mm/page_owner.c:181
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x3b78/0x3d40 mm/page_alloc.c:4192
__alloc_pages+0x272/0x700 mm/page_alloc.c:5464
alloc_pages_vma+0x39a/0x800 mm/mempolicy.c:2146
shmem_alloc_page mm/shmem.c:1588 [inline]
shmem_alloc_and_acct_page+0x4d1/0xd10 mm/shmem.c:1613
shmem_getpage_gfp+0x17b1/0x3190 mm/shmem.c:1908
shmem_getpage mm/shmem.c:151 [inline]
shmem_write_begin+0xce/0x1a0 mm/shmem.c:2479
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3785
__generic_file_write_iter+0x243/0x4f0 mm/filemap.c:3912
generic_file_write_iter+0xa7/0x1b0 mm/filemap.c:3944
call_write_iter include/linux/fs.h:2174 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacd/0xe50 fs/read_write.c:594
ksys_write+0x1a2/0x2c0 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f85e1cd5719
RSP: 002b:00007f85e014d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f85e1e8cf80 RCX: 00007f85e1cd5719
RDX: 000000000208e24b RSI: 0000000020000240 RDI: 0000000000000005
RBP: 00007f85e1d4875e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f85e1e8cf80 R15: 00007fffe56a44d8
rcu: rcu_preempt kthread starved for 10556 jiffies! g25849 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:27064 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
schedule+0x11b/0x1f0 kernel/sched/core.c:6456
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.15.172-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487
print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:592
check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
rcu_pending kernel/rcu/tree.c:3932 [inline]
rcu_sched_clock_irq+0xa38/0x1150 kernel/rcu/tree.c:2619
update_process_times+0x196/0x200 kernel/time/timer.c:1818
tick_sched_handle kernel/time/tick-sched.c:254 [inline]
tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1688 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
__sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:132 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:109 [inline]
RIP: 0010:acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:562
Code: 79 42 f7 48 83 e3 08 0f 85 0a 01 00 00 4c 8d 74 24 20 e8 24 f4 48 f7 0f 1f 44 00 00 e8 ca 75 42 f7 0f 00 2d 63 43 a5 00 fb f4 <4c> 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 bb 4d 8c f7
RSP: 0018:ffffffff8c607b80 EFLAGS: 000002d3
RAX: ffffffff8a3dfdd6 RBX: 0000000000000000 RCX: ffffffff8c6bd5c0
RDX: 0000000000000000 RSI: ffffffff8a8b2a80 RDI: ffffffff8ad90540
RBP: ffffffff8c607c10 R08: ffffffff8186f220 R09: fffffbfff18d7ab9
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff18c0f70
R13: ffff8881465b8004 R14: ffffffff8c607ba0 R15: dffffc0000000000
acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:697
cpuidle_enter_state+0x521/0xef0 drivers/cpuidle/cpuidle.c:237
cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:351
call_cpuidle kernel/sched/idle.c:158 [inline]
cpuidle_idle_call kernel/sched/idle.c:239 [inline]
do_idle+0x3e4/0x670 kernel/sched/idle.c:306
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403
start_kernel+0x48c/0x540 init/main.c:1140
secondary_startup_64_no_verify+0xb1/0xbb