IPVS: Schedule: port zero only supported in persistent services, check your ipvs configuration
IPVS: Schedule: port zero only supported in persistent services, check your ipvs configuration
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P23973/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=166745, q=741 ncpus=2)
task:udevd state:R running task stack:26472 pid:23973 tgid:23973 ppid:4977 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7188
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7512
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:rcu_is_watching+0x80/0xc0 kernel/rcu/tree.c:753
Code: 89 da 48 c1 ea 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 24 8b 03 c1 e8 02 83 e0 01 65 ff 0d 40 c9 1d 12 <74> 07 5b 5d c3 cc cc cc cc e8 42 f3 88 ff 5b 5d e9 1b 64 a0 09 48
RSP: 0018:ffffc90007bd7a48 EFLAGS: 00000286
RAX: 0000000000000001 RBX: ffff8880b8433da8 RCX: ffffffff82b91799
RDX: 0000000000000000 RSI: ffffffff8c1c3580 RDI: ffffffff8e1d3920
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88801f2b4000 R14: ffff88801dae3780 R15: ffffc90007bd7cc0
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x245/0x310 kernel/locking/lockdep.c:5879
rcu_lock_release include/linux/rcupdate.h:310 [inline]
rcu_read_unlock include/linux/rcupdate.h:869 [inline]
class_rcu_destructor include/linux/rcupdate.h:1181 [inline]
kernfs_root+0xf3/0x2a0 fs/kernfs/kernfs-internal.h:74
kernfs_root_is_locked fs/kernfs/kernfs-internal.h:108 [inline]
kernfs_parent fs/kernfs/kernfs-internal.h:132 [inline]
kernfs_dop_revalidate+0x516/0x7e0 fs/kernfs/dir.c:1224
d_revalidate fs/namei.c:1030 [inline]
d_revalidate fs/namei.c:1026 [inline]
lookup_fast+0x3c7/0x600 fs/namei.c:1876
walk_component fs/namei.c:2274 [inline]
link_path_walk+0x7d4/0x1cc0 fs/namei.c:2652
path_lookupat+0x74/0xc40 fs/namei.c:2808
filename_lookup+0x202/0x590 fs/namei.c:2838
do_readlinkat+0xd3/0x370 fs/stat.c:571
__do_sys_readlink fs/stat.c:605 [inline]
__se_sys_readlink fs/stat.c:602 [inline]
__x64_sys_readlink+0x78/0xc0 fs/stat.c:602
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9e60d153a7
RSP: 002b:00007ffe85bc36e8 EFLAGS: 00000202 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007ffe85bc3f30 RCX: 00007f9e60d153a7
RDX: 0000000000000400 RSI: 00007ffe85bc3af0 RDI: 00007ffe85bc36f0
RBP: 0000000000000200 R08: 0000557d3647bc29 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe85bc36f0
R13: 00007ffe85bc3af0 R14: 0000557d3647eca4 R15: 0000557d3647ebcc
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g166745 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=96799
rcu: rcu_preempt kthread starved for 10502 jiffies! g166745 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28904 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7282
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 24838 Comm: syz.1.4756 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__remove_hrtimer+0x8f/0x440 kernel/time/hrtimer.c:1147
Code: d0 7c 08 84 d2 0f 85 31 03 00 00 44 8b 35 cd 74 e3 0e 31 ff 44 89 f6 e8 af 2a 14 00 45 85 f6 0f 85 d7 02 00 00 e8 f1 2f 14 00 <48> 8d 7b 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f
RSP: 0018:ffffc90000a08e40 EFLAGS: 00000046
RAX: 0000000080010002 RBX: ffff888033a03300 RCX: ffffffff81f45d20
RDX: ffff888069df2500 RSI: ffffffff81f45a2f RDI: ffff888069df2500
RBP: ffff8880b8528600 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: ffff8880b85284c0 R14: 0000000000000001 R15: 0000000000000000
FS: 00007f0db90516c0(0000) GS:ffff888124476000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6c1c9e8158 CR3: 000000003ce5e000 CR4: 00000000003526f0
Call Trace:
__run_hrtimer kernel/time/hrtimer.c:1910 [inline]
__hrtimer_run_queues+0x359/0xa00 kernel/time/hrtimer.c:1994
hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2113
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
__sysvec_apic_timer_interrupt+0x10b/0x460 arch/x86/kernel/apic/apic.c:1067
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:109 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:151 [inline]
RIP: 0010:__schedule+0x260/0x6820 kernel/sched/core.c:7042
Code: 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 ed 64 00 00 83 3d 2c c8 4c 05 02 0f 84 35 3c 00 00 0f 1f 44 00 00 9c <58> fa f6 c4 02 0f 85 65 30 00 00 8b bd f8 fe ff ff e8 ea 50 63 f6
RSP: 0018:ffffc9000f1af938 EFLAGS: 00000297
RAX: 0000000000000003 RBX: ffffffff8b8b3b6d RCX: 1ffffffff21af39c
RDX: 0000000000000000 RSI: ffffffff8defa991 RDI: ffffffff8c1c3600
RBP: ffffc9000f1afaa0 R08: 0000000000000000 R09: fffffbfff21af36a
R10: ffffffff90d79b57 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880b853b240 R15: 0000000000000000
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7282
futex_do_wait+0x88/0x180 kernel/futex/waitwake.c:358
__futex_wait+0x1c4/0x300 kernel/futex/waitwake.c:691
futex_wait+0xe6/0x370 kernel/futex/waitwake.c:719
do_futex+0x1ef/0x350 kernel/futex/syscalls.c:130
__do_sys_futex kernel/futex/syscalls.c:207 [inline]
__se_sys_futex kernel/futex/syscalls.c:188 [inline]
__x64_sys_futex+0x34f/0x4d0 kernel/futex/syscalls.c:188
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0db819cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0db90510e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f0db8416098 RCX: 00007f0db819cdd9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f0db8416098
RBP: 00007f0db8416090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0db8416128 R14: 00007fff7b092680 R15: 00007fff7b092768
IPVS: Schedule: port zero only supported in persistent services, check your ipvs configuration