./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2395900276 <...> Warning: Permanently added '10.128.0.99' (ED25519) to the list of known hosts. execve("./syz-executor2395900276", ["./syz-executor2395900276"], 0x7ffc20ce6500 /* 10 vars */) = 0 brk(NULL) = 0x55558b4f6000 brk(0x55558b4f6d00) = 0x55558b4f6d00 arch_prctl(ARCH_SET_FS, 0x55558b4f6380) = 0 set_tid_address(0x55558b4f6650) = 5849 set_robust_list(0x55558b4f6660, 24) = 0 rseq(0x55558b4f6ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2395900276", 4096) = 28 getrandom("\xd7\xa1\x3d\xcd\x83\x10\x72\x2b", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558b4f6d00 brk(0x55558b517d00) = 0x55558b517d00 brk(0x55558b518000) = 0x55558b518000 mprotect(0x7f6338dbe000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5850 attached [pid 5850] set_robust_list(0x55558b4f6660, 24 [pid 5849] <... clone resumed>, child_tidptr=0x55558b4f6650) = 5850 [pid 5850] <... set_robust_list resumed>) = 0 [pid 5850] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5850] getppid() = 0 [pid 5850] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5850] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5850] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5850] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5850] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5850] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5850] unshare(CLONE_NEWNS) = 0 [pid 5850] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5850] unshare(CLONE_NEWIPC) = 0 [pid 5850] unshare(CLONE_NEWCGROUP) = 0 [pid 5850] unshare(CLONE_NEWUTS) = 0 [pid 5850] unshare(CLONE_SYSVSEM) = 0 [pid 5850] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5850] write(3, "16777216", 8) = 8 [pid 5850] close(3) = 0 [pid 5850] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5850] write(3, "536870912", 9) = 9 [pid 5850] close(3) = 0 [pid 5850] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5850] write(3, "1024", 4) = 4 [pid 5850] close(3) = 0 [pid 5850] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5850] write(3, "8192", 4) = 4 [pid 5850] close(3) = 0 [pid 5850] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5850] write(3, "1024", 4) = 4 [pid 5850] close(3) = 0 [pid 5850] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5850] write(3, "1024", 4) = 4 [pid 5850] close(3) = 0 [pid 5850] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5850] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5850] close(3) = 0 [pid 5850] getpid() = 1 [pid 5850] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< b8 00 00 00 00 00 fc ff df 48 8b 8c 24 80 00 00 00 80 3c 01 00 [ 218.615371][ C1] RSP: 0018:ffffc90000a08c70 EFLAGS: 00000082 [ 218.615391][ C1] RAX: ffffffff899114e5 RBX: ffff88807cee72c0 RCX: ffff88801d69da00 [ 218.615404][ C1] RDX: 0000000000010000 RSI: 0000000000000004 RDI: ffff888145752084 [ 218.615415][ C1] RBP: ffff888145752150 R08: ffff888145752087 R09: 1ffff11028aea410 [ 218.615428][ C1] R10: dffffc0000000000 R11: ffffed1028aea411 R12: ffff88807cee7340 [ 218.615440][ C1] R13: ffff88807cee7000 R14: 0000001c590f91af R15: ffff88814ce43000 [ 218.615453][ C1] FS: 0000000000000000(0000) GS:ffff888125d80000(0000) knlGS:0000000000000000 [ 218.615466][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 218.615477][ C1] CR2: 0000200000000600 CR3: 0000000074f1e000 CR4: 00000000003526f0 [ 218.615492][ C1] Call Trace: [ 218.615499][ C1] [ 218.615527][ C1] ? __pfx_advance_sched+0x10/0x10 [ 218.615546][ C1] __hrtimer_run_queues+0x52c/0xc60 [ 218.615584][ C1] ? __pfx___hrtimer_run_queues+0x10/0x10 [ 218.615610][ C1] ? read_tsc+0x9/0x20 [ 218.615637][ C1] hrtimer_interrupt+0x45b/0xaa0 [ 218.615677][ C1] __sysvec_apic_timer_interrupt+0x108/0x410 [ 218.615697][ C1] sysvec_apic_timer_interrupt+0xa1/0xc0 [ 218.615726][ C1] [ 218.615731][ C1] [ 218.615738][ C1] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 218.615756][ C1] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 218.615780][ C1] Code: 53 e8 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 13 6f 18 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 [ 218.615793][ C1] RSP: 0018:ffffc90000197de0 EFLAGS: 000002c2 [ 218.615807][ C1] RAX: 79d64d2c4fdb3700 RBX: ffffffff81969b18 RCX: 79d64d2c4fdb3700 [ 218.615820][ C1] RDX: 0000000000000001 RSI: ffffffff8d9790f8 RDI: ffffffff8be30a00 [ 218.615832][ C1] RBP: ffffc90000197f20 R08: ffff8880b8732f5b R09: 1ffff110170e65eb [ 218.615844][ C1] R10: dffffc0000000000 R11: ffffed10170e65ec R12: ffffffff8fa07af0 [ 218.615857][ C1] R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff11003ad3b40 [ 218.615869][ C1] ? do_idle+0x1e8/0x510 [ 218.615901][ C1] default_idle+0x13/0x20 [ 218.615916][ C1] default_idle_call+0x74/0xb0 [ 218.615931][ C1] do_idle+0x1e8/0x510 [ 218.615957][ C1] ? asm_sysvec_call_function_single+0x1a/0x20 [ 218.615975][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 218.616000][ C1] ? __pfx_do_idle+0x10/0x10 [ 218.616031][ C1] ? do_idle+0x10/0x510 [ 218.616058][ C1] cpu_startup_entry+0x44/0x60 [ 218.616084][ C1] start_secondary+0x101/0x110 [ 218.616108][ C1] common_startup_64+0x13e/0x147 [ 218.616137][ C1] [ 218.616221][ C0] rcu: rcu_preempt kthread starved for 10500 jiffies! g12773 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 218.933182][ C0] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 218.943149][ C0] rcu: RCU grace-period kthread stack dump: [ 218.949034][ C0] task:rcu_preempt state:R running task stack:27128 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000 [ 218.962558][ C0] Call Trace: [ 218.965865][ C0] [ 218.968806][ C0] __schedule+0x1737/0x4d30 [ 218.973339][ C0] ? do_raw_spin_unlock+0x122/0x240 [ 218.978568][ C0] ? schedule+0x165/0x360 [ 218.982935][ C0] ? __lock_acquire+0xab9/0xd20 [ 218.987813][ C0] ? __pfx___schedule+0x10/0x10 [ 218.992699][ C0] ? schedule+0x91/0x360 [ 218.996959][ C0] schedule+0x165/0x360 [ 219.001222][ C0] schedule_timeout+0x12b/0x270 [ 219.006083][ C0] ? __pfx_schedule_timeout+0x10/0x10 [ 219.011466][ C0] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 219.017388][ C0] ? __pfx_process_timeout+0x10/0x10 [ 219.022690][ C0] ? prepare_to_swait_event+0x341/0x380 [ 219.028257][ C0] rcu_gp_fqs_loop+0x301/0x1540 [ 219.033141][ C0] ? __pfx_rcu_watching_snap_save+0x10/0x10 [ 219.039059][ C0] ? __pfx_rcu_gp_fqs_loop+0x10/0x10 [ 219.044368][ C0] ? _raw_spin_unlock_irq+0x2e/0x50 [ 219.049598][ C0] ? finish_swait+0xcd/0x1f0 [ 219.054206][ C0] rcu_gp_kthread+0x99/0x390 [ 219.058817][ C0] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 219.064032][ C0] ? __kthread_parkme+0x7b/0x200 [ 219.068977][ C0] ? __kthread_parkme+0x1a1/0x200 [ 219.074021][ C0] kthread+0x70e/0x8a0 [ 219.078110][ C0] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 219.083330][ C0] ? __pfx_kthread+0x10/0x10 [ 219.087940][ C0] ? _raw_spin_unlock_irq+0x23/0x50 [ 219.093149][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 219.098362][ C0] ? __pfx_kthread+0x10/0x10 [ 219.102966][ C0] ret_from_fork+0x3fc/0x770 [ 219.107577][ C0] ? __pfx_ret_from_fork+0x10/0x10 [ 219.112732][ C0] ? __switch_to_asm+0x39/0x70 [ 219.117508][ C0] ? __switch_to_asm+0x33/0x70 [ 219.122298][ C0] ? __pfx_kthread+0x10/0x10 [ 219.126921][ C0] ret_from_fork_asm+0x1a/0x30 [ 219.131707][ C0] [ 219.134738][ C0] rcu: Stack dump where RCU GP kthread last ran: [ 219.141080][ C0] CPU: 0 UID: 0 PID: 1098 Comm: kworker/u8:5 Not tainted 6.16.0-syzkaller-06588-g759dfc7d04ba #0 PREEMPT(full) [ 219.152886][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 219.162941][ C0] Workqueue: events_unbound toggle_allocation_gate [ 219.169469][ C0] RIP: 0010:smp_call_function_many_cond+0xd33/0x12d0 [ 219.176148][ C0] Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 06 70 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 b1 6b 0b 00 eb 38 f3 90 <42> 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 95 6b [ 219.195760][ C0] RSP: 0018:ffffc90003a0f660 EFLAGS: 00000293 [ 219.201834][ C0] RAX: ffffffff81b4451b RBX: 1ffff110170e7f59 RCX: ffff8880268fbc00 [ 219.209815][ C0] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 219.217795][ C0] RBP: ffffc90003a0f7e0 R08: ffffffff8fa07af7 R09: 1ffffffff1f40f5e [ 219.225775][ C0] R10: dffffc0000000000 R11: fffffbfff1f40f5f R12: ffff8880b873fac8 [ 219.233753][ C0] R13: dffffc0000000000 R14: ffff8880b863b180 R15: 0000000000000001 [ 219.241759][ C0] FS: 0000000000000000(0000) GS:ffff888125c80000(0000) knlGS:0000000000000000 [ 219.250694][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 219.257291][ C0] CR2: 000055fb113f7000 CR3: 000000000df38000 CR4: 00000000003526f0 [ 219.265271][ C0] Call Trace: [ 219.268560][ C0] [ 219.271516][ C0] ? __pfx_do_sync_core+0x10/0x10 [ 219.276565][ C0] ? __pfx_smp_call_function_many_cond+0x10/0x10 [ 219.282946][ C0] ? __pfx_text_poke_memcpy+0x10/0x10 [ 219.288337][ C0] ? kmem_cache_alloc_bulk_noprof+0x148/0x790 [ 219.294422][ C0] ? __pfx___text_poke+0x10/0x10 [ 219.299388][ C0] ? rcu_is_watching+0x15/0xb0 [ 219.304179][ C0] ? trace_contention_end+0x39/0x120 [ 219.309498][ C0] ? __pfx_do_sync_core+0x10/0x10 [ 219.314558][ C0] on_each_cpu_cond_mask+0x3f/0x80 [ 219.319704][ C0] smp_text_poke_batch_finish+0x5f9/0x1130 [ 219.325545][ C0] ? arch_jump_label_transform_apply+0x17/0x30 [ 219.331729][ C0] ? __pfx___mutex_lock+0x10/0x10 [ 219.336780][ C0] ? __pfx_smp_text_poke_batch_finish+0x10/0x10 [ 219.343043][ C0] ? arch_jump_label_transform_queue+0x97/0x110 [ 219.349312][ C0] arch_jump_label_transform_apply+0x1c/0x30 [ 219.355314][ C0] static_key_enable_cpuslocked+0x128/0x250 [ 219.361236][ C0] static_key_enable+0x1a/0x20 [ 219.366018][ C0] toggle_allocation_gate+0xad/0x240 [ 219.371363][ C0] ? __pfx_toggle_allocation_gate+0x10/0x10 [ 219.377279][ C0] ? process_scheduled_works+0x9ef/0x17b0 [ 219.383025][ C0] ? process_scheduled_works+0x9ef/0x17b0 [ 219.388770][ C0] ? process_scheduled_works+0x9ef/0x17b0 [ 219.394515][ C0] process_scheduled_works+0xae1/0x17b0 [ 219.400127][ C0] ? __pfx_process_scheduled_works+0x10/0x10 [ 219.406150][ C0] worker_thread+0x8a0/0xda0 [ 219.410810][ C0] kthread+0x70e/0x8a0 [ 219.414915][ C0] ? __pfx_worker_thread+0x10/0x10 [ 219.420048][ C0] ? __pfx_kthread+0x10/0x10 [ 219.424659][ C0] ? _raw_spin_unlock_irq+0x23/0x50 [ 219.429877][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 219.435113][ C0] ? __pfx_kthread+0x10/0x10 [ 219.439717][ C0] ret_from_fork+0x3fc/0x770 [ 219.444358][ C0] ? __pfx_ret_from_fork+0x10/0x10 [ 219.449505][ C0] ? __switch_to_asm+0x39/0x70 [ 219.454285][ C0] ? __switch_to_asm+0x33/0x70 [ 219.459062][ C0] ? __pfx_kthread+0x10/0x10 [ 219.463667][ C0] ret_from_fork_asm+0x1a/0x30 [ 219.468475][ C0]