rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6636/1:b..l
(detected by 1, t=10502 jiffies, g=47521, q=816)
task:syz.2.848 state:R running task stack:21504 pid: 6636 ppid: 6605 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6549
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6574
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
__raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock+0x36/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:403 [inline]
filemap_map_pages+0x122d/0x15c0 mm/filemap.c:3353
do_fault_around mm/memory.c:4213 [inline]
do_read_fault mm/memory.c:4228 [inline]
do_fault mm/memory.c:4362 [inline]
handle_pte_fault mm/memory.c:4620 [inline]
__handle_mm_fault mm/memory.c:4755 [inline]
handle_mm_fault+0x341b/0x5960 mm/memory.c:4853
faultin_page mm/gup.c:976 [inline]
__get_user_pages+0x4ed/0x11d0 mm/gup.c:1197
__get_user_pages_locked mm/gup.c:1382 [inline]
get_dump_page+0x1ad/0x8a0 mm/gup.c:1838
dump_user_range+0x64/0x320 fs/coredump.c:945
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2883
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:154 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f48ff10df01
RSP: 002b:00000000200003c0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f48ff2c5f80 RCX: 00007f48ff10def9
RDX: 0000000020000400 RSI: 00000000200003c0 RDI: 0000000008002000
RBP: 00007f48ff1809f6 R08: 0000000020000680 R09: 0000000020000680
R10: 0000000020000500 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f48ff2c5f80 R15: 00007ffdaf204fb8
rcu: rcu_preempt kthread starved for 10536 jiffies! g47521 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:26168 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 1
CPU: 1 PID: 6661 Comm: syz.4.858 Not tainted 5.15.166-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:kvm_wait+0x1b4/0x200 arch/x86/kernel/kvm.c:918
Code: e0 48 c1 e8 03 42 0f b6 04 28 84 c0 75 42 45 0f b6 34 24 e8 ee d6 4e 00 44 3a 74 24 1c 75 10 66 90 0f 00 2d 8e 7c 50 09 fb f4 c8 fe ff ff fb e9 c2 fe ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 54
RSP: 0018:ffffc90003bd75e0 EFLAGS: 00000246
RAX: c93f33c7ead97200 RBX: 1ffff9200077aec0 RCX: ffffffff81631a88
RDX: dffffc0000000000 RSI: ffffffff8a8b2a20 RDI: ffffffff8ad90100
RBP: ffffc90003bd76b0 R08: dffffc0000000000 R09: fffffbfff20e2219
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8c9deca0
R13: dffffc0000000000 R14: 0000000000000003 R15: ffffc90003bd7620
pv_wait arch/x86/include/asm/paravirt.h:597 [inline]
pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
__pv_queued_spin_lock_slowpath+0x6bc/0xc40 kernel/locking/qspinlock.c:508
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51
queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
do_raw_spin_lock+0x269/0x370 kernel/locking/spinlock_debug.c:115
spin_lock include/linux/spinlock.h:363 [inline]
preload_this_cpu_lock mm/vmalloc.c:1500 [inline]
alloc_vmap_area+0x23c/0x19a0 mm/vmalloc.c:1542
__get_vm_area_node+0x16e/0x2f0 mm/vmalloc.c:2423
__vmalloc_node_range+0xe3/0x8c0 mm/vmalloc.c:3019
__vmalloc_node mm/vmalloc.c:3079 [inline]
__vmalloc+0x75/0x80 mm/vmalloc.c:3093
bpf_prog_alloc_no_stats+0x33/0x2f0 kernel/bpf/core.c:90
bpf_prog_alloc+0x18/0x1d0 kernel/bpf/core.c:124
bpf_prog_load+0x800/0x1b60 kernel/bpf/syscall.c:2300
__sys_bpf+0x343/0x670 kernel/bpf/syscall.c:4651
__do_sys_bpf kernel/bpf/syscall.c:4755 [inline]
__se_sys_bpf kernel/bpf/syscall.c:4753 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4753
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: 0033:0x7fccb14e4ef9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fccaf93c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fccb169d058 RCX: 00007fccb14e4ef9
RDX: 0000000000000070 RSI: 0000000020000180 RDI: 0000000000000005
RBP: 00007fccb15579f6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fccb169d058 R15: 00007fff56d67438