Warning: Permanently added '10.128.0.107' (ED25519) to the list of known hosts. executing program [ 577.849960][ T30] audit: type=1400 audit(1714457270.346:68): avc: denied { execmem } for pid=842 comm="syz-executor260" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 763.236114][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 763.243185][ C0] (detected by 0, t=10002 jiffies, g=5217, q=8) [ 763.249330][ C0] rcu: All QSes seen, last rcu_preempt kthread activity 10002 (4295013542-4295003540), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 763.262529][ C0] rcu: rcu_preempt kthread starved for 10002 jiffies! g5217 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 763.273460][ C0] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 763.283269][ C0] rcu: RCU grace-period kthread stack dump: [ 763.289005][ C0] task:rcu_preempt state:R running task stack:28288 pid: 14 ppid: 2 flags:0x00004000 [ 763.299595][ C0] Call Trace: [ 763.302711][ C0] [ 763.305495][ C0] __schedule+0xccc/0x1590 [ 763.309743][ C0] ? __sched_text_start+0x8/0x8 [ 763.314427][ C0] ? preempt_schedule+0xd9/0xe0 [ 763.319111][ C0] preempt_schedule_common+0x9b/0xf0 [ 763.324235][ C0] preempt_schedule+0xd9/0xe0 [ 763.329382][ C0] ? schedule_preempt_disabled+0x20/0x20 [ 763.335525][ C0] ? sysvec_apic_timer_interrupt+0x55/0xc0 [ 763.341164][ C0] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20 [ 763.347160][ C0] preempt_schedule_thunk+0x16/0x18 [ 763.352187][ C0] ? enqueue_timer+0x3b8/0x4c0 [ 763.356789][ C0] _raw_spin_unlock_irqrestore+0x71/0x80 [ 763.362255][ C0] __mod_timer+0x903/0xcf0 [ 763.366513][ C0] ? mod_timer_pending+0x30/0x30 [ 763.371284][ C0] ? __kasan_check_write+0x14/0x20 [ 763.376227][ C0] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 763.381523][ C0] schedule_timeout+0x187/0x370 [ 763.386210][ C0] ? _raw_spin_unlock_irq+0x4e/0x70 [ 763.391245][ C0] ? console_conditional_schedule+0x30/0x30 [ 763.396972][ C0] ? update_process_times+0x200/0x200 [ 763.402177][ C0] ? prepare_to_swait_event+0x308/0x320 [ 763.407563][ C0] rcu_gp_fqs_loop+0x2af/0xf80 [ 763.412164][ C0] ? debug_smp_processor_id+0x17/0x20 [ 763.417369][ C0] ? __note_gp_changes+0x4ab/0x920 [ 763.422313][ C0] ? rcu_gp_init+0xc30/0xc30 [ 763.426742][ C0] ? _raw_spin_unlock_irq+0x4e/0x70 [ 763.431774][ C0] ? rcu_gp_init+0x9cf/0xc30 [ 763.436203][ C0] rcu_gp_kthread+0xa4/0x350 [ 763.440713][ C0] ? _raw_spin_lock+0x1b0/0x1b0 [ 763.445505][ C0] ? rcu_barrier_callback+0x50/0x50 [ 763.450523][ C0] ? __kasan_check_read+0x11/0x20 [ 763.455385][ C0] ? __kthread_parkme+0xb2/0x200 [ 763.460158][ C0] kthread+0x421/0x510 [ 763.464061][ C0] ? rcu_barrier_callback+0x50/0x50 [ 763.469095][ C0] ? kthread_blkcg+0xd0/0xd0 [ 763.473524][ C0] ret_from_fork+0x1f/0x30 [ 763.477783][ C0] [ 763.480642][ C0] rcu: Stack dump where RCU GP kthread last ran: [ 763.486817][ C0] NMI backtrace for cpu 0 [ 763.490984][ C0] CPU: 0 PID: 855 Comm: syz-executor260 Not tainted 5.15.149-syzkaller-00490-g5d96939590c0 #0 [ 763.501034][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 763.511115][ C0] Call Trace: [ 763.514670][ C0] [ 763.518223][ C0] dump_stack_lvl+0x151/0x1b7 [ 763.522739][ C0] ? io_uring_drop_tctx_refs+0x190/0x190 [ 763.528297][ C0] dump_stack+0x15/0x17 [ 763.532434][ C0] nmi_cpu_backtrace+0x2f7/0x300 [ 763.537190][ C0] ? nmi_trigger_cpumask_backtrace+0x270/0x270 [ 763.543168][ C0] ? panic+0x751/0x751 [ 763.547076][ C0] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 763.552975][ C0] nmi_trigger_cpumask_backtrace+0x15d/0x270 [ 763.558792][ C0] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 763.564694][ C0] arch_trigger_cpumask_backtrace+0x10/0x20 [ 763.570511][ C0] rcu_check_gp_kthread_starvation+0x1e3/0x250 [ 763.576506][ C0] print_other_cpu_stall+0x112d/0x1340 [ 763.581794][ C0] ? print_cpu_stall+0x5f0/0x5f0 [ 763.586568][ C0] rcu_sched_clock_irq+0xaec/0x12f0 [ 763.591601][ C0] ? rcu_boost_kthread_setaffinity+0x340/0x340 [ 763.597592][ C0] ? hrtimer_run_queues+0x15f/0x440 [ 763.602719][ C0] update_process_times+0x198/0x200 [ 763.607832][ C0] tick_sched_timer+0x188/0x240 [ 763.612516][ C0] ? tick_setup_sched_timer+0x480/0x480 [ 763.617895][ C0] __hrtimer_run_queues+0x41a/0xad0 [ 763.622932][ C0] ? hrtimer_interrupt+0xaa0/0xaa0 [ 763.627883][ C0] ? clockevents_program_event+0x22f/0x300 [ 763.633528][ C0] ? ktime_get_update_offsets_now+0x2ba/0x2d0 [ 763.639579][ C0] hrtimer_interrupt+0x40c/0xaa0 [ 763.644421][ C0] __sysvec_apic_timer_interrupt+0xfd/0x3c0 [ 763.650143][ C0] sysvec_apic_timer_interrupt+0x95/0xc0 [ 763.655717][ C0] [ 763.658486][ C0] [ 763.661266][ C0] asm_sysvec_apic_timer_interrupt+0x1b/0x20 [ 763.667089][ C0] RIP: 0010:_raw_spin_unlock_irq+0x49/0x70 [ 763.672743][ C0] Code: 08 00 74 0c 48 c7 c7 d8 54 8d 86 e8 41 6c e9 fc 48 83 3d 21 78 c4 01 00 74 2a 48 89 df e8 93 09 8c fc 66 90 fb bf 01 00 00 00 12 4d 83 fc 65 8b 05 b3 90 39 7b 85 c0 74 03 5b 5d c3 e8 b3 a4 [ 763.692255][ C0] RSP: 0018:ffffc90000a27bb8 EFLAGS: 00000246 [ 763.698154][ C0] RAX: 0000000000000001 RBX: ffff88810c4c5780 RCX: dffffc0000000000 [ 763.705969][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 [ 763.713774][ C0] RBP: ffffc90000a27bc0 R08: ffffffff81456dfa R09: fffff52000144fc0 [ 763.721584][ C0] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88810c4c5780 [ 763.729398][ C0] R13: ffff88810c4c5ba0 R14: 0000000000000021 R15: dffffc0000000000 [ 763.737311][ C0] ? get_signal+0x151a/0x1630 [ 763.741816][ C0] ? _raw_spin_unlock_irq+0x41/0x70 [ 763.746846][ C0] get_signal+0x1562/0x1630 [ 763.751194][ C0] arch_do_signal_or_restart+0xbd/0x1680 [ 763.756660][ C0] ? __do_compat_sys_x32_rt_sigreturn+0x1e0/0x1e0 [ 763.762993][ C0] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 763.767942][ C0] ? __kasan_check_write+0x14/0x20 [ 763.772886][ C0] ? _copy_from_user+0x96/0xd0 [ 763.777622][ C0] ? restore_altstack+0x274/0x400 [ 763.782729][ C0] ? get_sigframe_size+0x10/0x10 [ 763.787493][ C0] ? __ia32_sys_sigaltstack+0x70/0x70 [ 763.792711][ C0] ? __do_sys_rt_sigreturn+0x160/0x1e0 [ 763.797994][ C0] exit_to_user_mode_loop+0xa0/0xe0 [ 763.803032][ C0] exit_to_user_mode_prepare+0x5a/0xa0 [ 763.808322][ C0] syscall_exit_to_user_mode+0x26/0x160 [ 763.813707][ C0] do_syscall_64+0x49/0xb0 [ 763.817956][ C0] ? sysvec_apic_timer_interrupt+0x55/0xc0 [ 763.823613][ C0] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 763.829521][ C0] RIP: 0033:0x7f249b82c417 [ 763.833757][ C0] Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 [ 763.853197][ C0] RSP: 002b:00007f249b7ed238 EFLAGS: 00000246 [ 763.859097][ C0] RAX: 00000000000000ca RBX: 00007f249b8b6308 RCX: 00007f249b82c419 [ 763.866909][ C0] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f249b8b6308 [ 763.874724][ C0] RBP: 00007f249b8b6300 R08: 00007f249b7ed6c0 R09: 00007f249b7ed6c0 [ 763.882528][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f249b8b630c [ 763.890340][ C0] R13: 0000000000000000 R14: 00007fffe9edb780 R15: 00007fffe9edb868 [ 763.898156][ C0] [ 858.856128][ C0] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 278s! [ 858.864868][ C0] Showing busy workqueues and worker pools: [ 858.870626][ C0] workqueue events: flags=0x0 [ 858.875098][ C0] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 refcnt=3 [ 858.875143][ C0] pending: vmstat_shepherd, psi_avgs_work [ 858.875184][ C0] workqueue events_unbound: flags=0x2 [ 858.893846][ C0] pwq 4: cpus=0-1 flags=0x4 nice=0 active=2/512 refcnt=4 [ 858.893884][ C0] pending: toggle_allocation_gate, flush_memcg_stats_dwork [ 858.893931][ C0] workqueue events_power_efficient: flags=0x80 [ 858.914417][ C0] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 refcnt=3 [ 858.914458][ C0] pending: neigh_periodic_work, gc_worker [ 858.914498][ C0] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 refcnt=3 [ 858.914533][ C0] pending: neigh_periodic_work, check_lifetime [ 858.914573][ C0] workqueue writeback: flags=0x4a [ 858.946571][ C0] pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/256 refcnt=3 [ 858.946609][ C0] pending: wb_workfn [ 858.946644][ C0] workqueue kblockd: flags=0x18 [ 858.962446][ C0] pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=1/256 refcnt=2 [ 858.962486][ C0] pending: blk_mq_timeout_work [ 858.962516][ C0] workqueue dm_bufio_cache: flags=0x8 [ 858.980431][ C0] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 [ 858.980480][ C0] pending: work_fn [ 858.980507][ C0] workqueue ipv6_addrconf: flags=0x40008 [ 858.997261][ C0] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1 refcnt=2 [ 858.997303][ C0] pending: addrconf_verify_work