rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5818/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=8589, q=753 ncpus=2)
task:syz-executor state:R running task stack:23184 pid:5818 tgid:5818 ppid:5812 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5373 [inline]
__schedule+0x1142/0x5b60 kernel/sched/core.c:6760
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7082
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:unwind_next_frame+0x53/0x20c0 arch/x86/kernel/unwind_orc.c:470
Code: 02 84 c0 74 08 3c 03 0f 8e 48 0a 00 00 41 8b 5d 00 85 db 75 15 31 c0 48 83 c4 38 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc <49> 8d 6d 48 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80
RSP: 0018:ffffc90004757230 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 1ffff920008eae54 RSI: ffffffff81f1f39c RDI: ffffc900047572a0
RBP: ffffc90004757330 R08: ffffc900047572d4 R09: ffffffff9100a74c
R10: ffffc900047572a0 R11: 000000000000ef8b R12: ffffffff8185b170
R13: ffffc900047572a0 R14: 0000000000000000 R15: ffff88802834a440
arch_stack_walk+0x95/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x8d/0x400 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0x661/0x1080 mm/page_alloc.c:2659
__put_partials+0x14c/0x170 mm/slub.c:3157
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_kmalloc+0x8a/0xb0 mm/kasan/common.c:385
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4298 [inline]
__kmalloc_noprof+0x21c/0x510 mm/slub.c:4310
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
tomoyo_encode2+0x100/0x3e0 security/tomoyo/realpath.c:45
tomoyo_encode+0x29/0x50 security/tomoyo/realpath.c:80
tomoyo_realpath_from_path+0x19d/0x720 security/tomoyo/realpath.c:283
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x2ad/0x3c0 security/tomoyo/file.c:771
tomoyo_file_open+0x6b/0x90 security/tomoyo/tomoyo.c:334
security_file_open+0x84/0x1e0 security/security.c:3104
do_dentry_open+0x57e/0x1ea0 fs/open.c:921
vfs_open+0x82/0x3f0 fs/open.c:1068
do_open fs/namei.c:3828 [inline]
path_openat+0x1e81/0x2d70 fs/namei.c:3987
do_filp_open+0x20c/0x470 fs/namei.c:4014
do_sys_openat2+0x17a/0x1e0 fs/open.c:1395
do_sys_open fs/open.c:1410 [inline]
__do_sys_openat fs/open.c:1426 [inline]
__se_sys_openat fs/open.c:1421 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1421
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff8fab85621
RSP: 002b:00007fff619fa530 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff8fac018f4 RCX: 00007ff8fab85621
RDX: 0000000000090800 RSI: 00007fff619fb6d0 RDI: 00000000ffffff9c
RBP: 00007fff619fb6bc R08: 0000000000000000 R09: 00007ff8fb8e7000
R10: 0000000000000000 R11: 0000000000000287 R12: 00007fff619fb6d0
R13: 00007ff8fac018f4 R14: 00007fff619fb710 R15: 000000000000001d
rcu: rcu_preempt kthread starved for 1335 jiffies! g8589 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27488 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5373 [inline]
__schedule+0x1142/0x5b60 kernel/sched/core.c:6760
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7082
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__debug_object_init+0x0/0x3e0 lib/debugobjects.c:732
Code: 08 4c 8b 54 24 18 e9 d4 fd ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 48 89 e5 41 57 41 56 49 be 00 00 00 00 00 fc ff df 41 55 49 89
RSP: 0018:ffffc90000167b88 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc90000167be0 RCX: ffffffff8b6f9fe0
RDX: 0000000000000001 RSI: ffffffff8b6f8e20 RDI: ffffc90000167be0
RBP: 0000000000000000 R08: ffffffff9a884ee0 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8b6f9fe0
R13: ffffffff9a884ee0 R14: ffffffff818772d0 R15: 0000000000000001
init_timer_on_stack_key+0x2e/0x120 kernel/time/timer.c:858
schedule_timeout+0x112/0x280 kernel/time/sleep_timeout.c:96
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2024
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2226
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-syzkaller-02526-gc4b9570cfb63 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:rcu_lockdep_current_cpu_online+0x64/0x150 kernel/rcu/tree.c:3953
Code: 03 00 83 f8 07 89 c5 0f 87 ed 00 00 00 48 8d 3c ed e0 4c a9 8d 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 a8 00 00 00 48 03 1c ed e0 4c a9 8d 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc900000074a8 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 000000000003fbc0 RCX: ffffffff89e14eac
RDX: 1ffffffff1b5299c RSI: ffffffff8bd2c6c0 RDI: ffffffff8da94ce0
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: ffffc900000077d0 R14: 0000000000000000 R15: ffff888033dc90b8
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555570bfd5c8 CR3: 00000000665ec000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:113 [inline]
rcu_read_lock_held+0x27/0x50 kernel/rcu/update.c:349
__find_rr_leaf+0x36d/0xe00 net/ipv6/route.c:800
find_rr_leaf net/ipv6/route.c:856 [inline]
rt6_select net/ipv6/route.c:900 [inline]
fib6_table_lookup+0x57e/0xa30 net/ipv6/route.c:2195
ip6_pol_route+0x1cd/0x1120 net/ipv6/route.c:2231
pol_lookup_func include/net/ip6_fib.h:616 [inline]
fib6_rule_lookup+0x536/0x720 net/ipv6/fib6_rules.c:117
ip6_route_input_lookup net/ipv6/route.c:2300 [inline]
ip6_route_input+0x663/0xc10 net/ipv6/route.c:2596
ip6_rcv_finish_core.constprop.0+0x1a0/0x5d0 net/ipv6/ip6_input.c:66
ip6_rcv_finish net/ipv6/ip6_input.c:77 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ipv6_rcv+0x1e4/0x680 net/ipv6/ip6_input.c:309
__netif_receive_skb_one_core+0x12e/0x1e0 net/core/dev.c:5704
__netif_receive_skb+0x1d/0x160 net/core/dev.c:5817
process_backlog+0x443/0x15f0 net/core/dev.c:6149
__napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6902
napi_poll net/core/dev.c:6971 [inline]
net_rx_action+0xa94/0x1010 net/core/dev.c:7093
handle_softirqs+0x213/0x8f0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
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:92 [inline]
RIP: 0010:acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 05 38 2a d4 74 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 08 b3 ae 00 fb f4 c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff8de07d70 EFLAGS: 00000246
RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff8b2f9239
RDX: 0000000000000001 RSI: ffff8881442bd000 RDI: ffff8881442bd064
RBP: ffff8881442bd064 R08: 0000000000000001 R09: ffffed10170c6f7d
R10: ffff8880b8637beb R11: 0000000000000000 R12: ffff888146695800
R13: ffffffff8ee2c420 R14: 0000000000000000 R15: 0000000000000000
acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:699
cpuidle_enter_state+0xaa/0x4f0 drivers/cpuidle/cpuidle.c:268
cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:389
cpuidle_idle_call kernel/sched/idle.c:230 [inline]
do_idle+0x310/0x3f0 kernel/sched/idle.c:325
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:423
rest_init+0x16b/0x2b0 init/main.c:747
start_kernel+0x3e9/0x4d0 init/main.c:1103
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x148