Warning: Permanently added '10.128.0.115' (ED25519) to the list of known hosts. executing program executing program [ 193.296159][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 193.303335][ C1] rcu: (detected by 1, t=10502 jiffies, g=9353, q=190 ncpus=2) [ 193.311006][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294956405-4294945902), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 193.324436][ C1] rcu: rcu_preempt kthread starved for 10504 jiffies! g9353 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 193.335655][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 193.345673][ C1] rcu: RCU grace-period kthread stack dump: [ 193.351608][ C1] task:rcu_preempt state:R running task stack:27848 pid:17 ppid:2 flags:0x00004000 [ 193.362470][ C1] Call Trace: [ 193.365799][ C1] [ 193.368776][ C1] __schedule+0x15ae/0x4660 [ 193.373385][ C1] ? __lock_acquire+0x7d80/0x7d80 [ 193.378463][ C1] ? lock_chain_count+0x20/0x20 [ 193.383398][ C1] ? lockdep_hardirqs_on+0x98/0x150 [ 193.388673][ C1] ? _raw_spin_unlock_irqrestore+0xc5/0x120 [ 193.394660][ C1] ? asan.module_dtor+0x20/0x20 [ 193.399590][ C1] ? rcu_is_watching+0x15/0xb0 [ 193.404448][ C1] schedule+0xbd/0x170 [ 193.408589][ C1] schedule_timeout+0x188/0x2d0 [ 193.413633][ C1] ? console_conditional_schedule+0x40/0x40 [ 193.419723][ C1] ? update_process_times+0x1b0/0x1b0 [ 193.425209][ C1] ? prepare_to_swait_event+0x344/0x360 [ 193.430852][ C1] rcu_gp_fqs_loop+0x30d/0x1590 [ 193.435778][ C1] ? rcu_gp_kthread+0x3b0/0x3b0 [ 193.440709][ C1] ? lockdep_hardirqs_on_prepare+0x44c/0x7d0 [ 193.446778][ C1] ? __lock_acquire+0x7d80/0x7d80 [ 193.451874][ C1] ? rcu_gp_init+0x1530/0x1530 [ 193.456697][ C1] ? rcu_gp_cleanup+0xade/0xc30 [ 193.461623][ C1] ? _raw_spin_unlock_irq+0x23/0x50 [ 193.466894][ C1] ? lockdep_hardirqs_on+0x98/0x150 [ 193.472159][ C1] rcu_gp_kthread+0x9d/0x3b0 [ 193.476813][ C1] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 193.481975][ C1] ? __kthread_parkme+0x71/0x1c0 [ 193.486960][ C1] ? __kthread_parkme+0x15b/0x1c0 [ 193.492227][ C1] kthread+0x2fa/0x390 [ 193.496363][ C1] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 193.501564][ C1] ? kthread_blkcg+0xd0/0xd0 [ 193.506203][ C1] ret_from_fork+0x48/0x80 [ 193.510684][ C1] ? kthread_blkcg+0xd0/0xd0 [ 193.515320][ C1] ret_from_fork_asm+0x11/0x20 [ 193.520166][ C1] [ 193.523281][ C1] rcu: Stack dump where RCU GP kthread last ran: [ 193.529648][ C1] Sending NMI from CPU 1 to CPUs 0: [ 193.534912][ C0] NMI backtrace for cpu 0 [ 193.534935][ C0] CPU: 0 PID: 5785 Comm: syz-executor179 Not tainted syzkaller #0 [ 193.534951][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 193.534964][ C0] RIP: 0010:check_preemption_disabled+0x56/0x110 [ 193.534994][ C0] Code: 74 1f 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c <8f> 04 24 f7 04 24 00 02 00 00 74 cc 65 4c 8b 3d 86 ca 7f 75 41 f6 [ 193.535008][ C0] RSP: 0018:ffffc900042b7a78 EFLAGS: 00000046 [ 193.535023][ C0] RAX: 0000000000000000 RBX: ffff88802accda00 RCX: 0000000080000000 [ 193.535034][ C0] RDX: 0000000000000000 RSI: ffffffff8acad840 RDI: ffffffff8b1c7be0 [ 193.535045][ C0] RBP: 00000000ffffffff R08: ffffc900042b7cdf R09: 0000000000000000 [ 193.535057][ C0] R10: ffffc900042b7cc0 R11: fffff52000856f9c R12: dffffc0000000000 [ 193.535069][ C0] R13: 0000000000000246 R14: ffffffff8d131e00 R15: 00000000ffffffff [ 193.535080][ C0] FS: 00007f3763cb76c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 [ 193.535094][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 193.535105][ C0] CR2: 0000200000000058 CR3: 000000002b5d5000 CR4: 00000000003506f0 [ 193.535120][ C0] Call Trace: [ 193.535127][ C0] [ 193.535137][ C0] lock_is_held_type+0x79/0x190 [ 193.535165][ C0] __might_resched+0x9f/0x5f0 [ 193.535190][ C0] ? __might_sleep+0xe0/0xe0 [ 193.535212][ C0] ? lockdep_hardirqs_on_prepare+0x44c/0x7d0 [ 193.535231][ C0] ? get_signal+0x1197/0x1390 [ 193.535247][ C0] ? lock_chain_count+0x20/0x20 [ 193.535267][ C0] __might_fault+0x71/0x120 [ 193.535285][ C0] __rseq_handle_notify_resume+0x14b/0x1140 [ 193.535313][ C0] ? __bpf_trace_rseq_ip_fixup+0x240/0x240 [ 193.535335][ C0] ? lockdep_hardirqs_on_prepare+0x44c/0x7d0 [ 193.535356][ C0] ? lock_chain_count+0x20/0x20 [ 193.535376][ C0] ? arch_do_signal_or_restart+0x39b/0x7b0 [ 193.535403][ C0] arch_do_signal_or_restart+0x3d2/0x7b0 [ 193.535430][ C0] ? get_sigframe_size+0x20/0x20 [ 193.535463][ C0] ? exit_to_user_mode_loop+0x3b/0x110 [ 193.535488][ C0] exit_to_user_mode_loop+0x70/0x110 [ 193.535512][ C0] exit_to_user_mode_prepare+0xee/0x180 [ 193.535535][ C0] syscall_exit_to_user_mode+0x1a/0x50 [ 193.535613][ C0] do_syscall_64+0x61/0xb0 [ 193.535631][ C0] ? clear_bhb_loop+0x40/0x90 [ 193.535646][ C0] ? clear_bhb_loop+0x40/0x90 [ 193.535662][ C0] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 193.535687][ C0] RIP: 0033:0x7f3763cd8717 [ 193.535705][ C0] Code: 00 85 c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d0 ff ff ff f7 d8 64 89 [ 193.535717][ C0] RSP: 002b:00007f3763cb7178 EFLAGS: 00000246 [ 193.535730][ C0] RAX: 00000000000000ca RBX: 00007f3763d88b28 RCX: 00007f3763cd8719 [ 193.535741][ C0] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3763d88b28 [ 193.535751][ C0] RBP: 00007f3763d88b20 R08: 00007f3763cb7cdc R09: 00007f3763cb7cdc [ 193.535762][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3763d88b2c [ 193.535772][ C0] R13: 0000000000000000 R14: 00007ffc2e1ee740 R15: 00007ffc2e1ee828 [ 193.535791][ C0]