./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor28444734 <...> Warning: Permanently added '10.128.0.78' (ED25519) to the list of known hosts. execve("./syz-executor28444734", ["./syz-executor28444734"], 0x7ffef2335a20 /* 10 vars */) = 0 brk(NULL) = 0x555569037000 brk(0x555569037d00) = 0x555569037d00 arch_prctl(ARCH_SET_FS, 0x555569037380) = 0 set_tid_address(0x555569037650) = 5067 set_robust_list(0x555569037660, 24) = 0 rseq(0x555569037ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor28444734", 4096) = 26 getrandom("\x8b\x16\xc4\xdd\xcc\xe2\xf7\x6e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555569037d00 brk(0x555569058d00) = 0x555569058d00 brk(0x555569059000) = 0x555569059000 mprotect(0x7fc196052000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5068 attached , child_tidptr=0x555569037650) = 5068 [pid 5068] set_robust_list(0x555569037660, 24) = 0 [pid 5068] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5068] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5068] setsid() = 1 [pid 5068] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5068] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5068] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5068] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5068] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5068] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5068] unshare(CLONE_NEWNS) = 0 [pid 5068] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5068] unshare(CLONE_NEWIPC) = 0 [pid 5068] unshare(CLONE_NEWCGROUP) = 0 [pid 5068] unshare(CLONE_NEWUTS) = 0 [pid 5068] unshare(CLONE_SYSVSEM) = 0 [pid 5068] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5068] write(3, "16777216", 8) = 8 [pid 5068] close(3) = 0 [pid 5068] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5068] write(3, "536870912", 9) = 9 [pid 5068] close(3) = 0 [pid 5068] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5068] write(3, "1024", 4) = 4 [pid 5068] close(3) = 0 [pid 5068] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5068] write(3, "8192", 4) = 4 [pid 5068] close(3) = 0 [pid 5068] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5068] write(3, "1024", 4) = 4 [pid 5068] close(3) = 0 [pid 5068] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5068] write(3, "1024", 4) = 4 [pid 5068] close(3) = 0 [pid 5068] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5068] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5068] close(3) = 0 [pid 5068] getpid() = 1 [pid 5068] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5068] kill(-2, SIGKILL) = 0 [pid 5068] kill(2, SIGKILL) = 0 [pid 5068] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5068] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5068] getdents64(3, 0x5555690386f0 /* 2 entries */, 32768) = 48 [pid 5068] getdents64(3, 0x5555690386f0 /* 0 entries */, 32768) = 0 [pid 5068] close(3) = 0 [ 174.005592][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 174.012657][ C1] rcu: 0-...!: (1 ticks this GP) idle=bc54/0/0x1 softirq=5744/5744 fqs=0 [ 174.021702][ C1] rcu: (detected by 1, t=10503 jiffies, g=6689, q=128 ncpus=2) [ 174.029344][ C1] Sending NMI from CPU 1 to CPUs 0: [ 174.034559][ C0] NMI backtrace for cpu 0 [ 174.034570][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.8.0-syzkaller-08073-g480e035fc4c7 #0 [ 174.034585][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 174.034594][ C0] RIP: 0010:kasan_check_range+0x24/0x290 [ 174.034643][ C0] Code: 90 90 90 90 90 90 66 0f 1f 00 55 41 57 41 56 41 54 53 b0 01 48 85 f6 0f 84 a0 01 00 00 4c 8d 04 37 49 39 f8 0f 82 56 02 00 00 <48> 89 fd 48 c1 ed 2f 81 fd fe ff 01 00 0f 86 43 02 00 00 48 89 fb [ 174.034656][ C0] RSP: 0018:ffffc90000007a40 EFLAGS: 00000012 [ 174.034670][ C0] RAX: 0000000000000001 RBX: 0000000000000067 RCX: ffffffff8171a5ba [ 174.034681][ C0] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff92ce1508 [ 174.034692][ C0] RBP: 0000000000000002 R08: ffffffff92ce1510 R09: 1ffffffff259c2a1 [ 174.034704][ C0] R10: dffffc0000000000 R11: fffffbfff259c2a2 R12: 0000000000000001 [ 174.034715][ C0] R13: ffffffff8de94680 R14: 0000000000000000 R15: ffffffff8de95178 [ 174.034727][ C0] FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 [ 174.034741][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 174.034753][ C0] CR2: 0000000020000600 CR3: 0000000028cd6000 CR4: 00000000003506f0 [ 174.034767][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 174.034777][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 174.034788][ C0] Call Trace: [ 174.034795][ C0] [ 174.034803][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 174.034823][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 174.034841][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 174.034863][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 174.034882][ C0] ? nmi_handle+0x14f/0x580 [ 174.034897][ C0] ? nmi_handle+0x2a/0x580 [ 174.034912][ C0] ? kasan_check_range+0x24/0x290 [ 174.034930][ C0] ? default_do_nmi+0x63/0x160 [ 174.034945][ C0] ? exc_nmi+0x123/0x1f0 [ 174.034959][ C0] ? end_repeat_nmi+0xf/0x53 [ 174.034978][ C0] ? __lock_acquire+0x5ca/0x1fd0 [ 174.034993][ C0] ? kasan_check_range+0x24/0x290 [ 174.035011][ C0] ? kasan_check_range+0x24/0x290 [ 174.035031][ C0] ? kasan_check_range+0x24/0x290 [ 174.035049][ C0] [ 174.035054][ C0] [ 174.035060][ C0] __lock_acquire+0x5ca/0x1fd0 [ 174.035081][ C0] lock_acquire+0x1e4/0x530 [ 174.035095][ C0] ? __hrtimer_run_queues+0x65a/0xd00 [ 174.035115][ C0] ? advance_sched+0xa02/0xca0 [ 174.035141][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 174.035158][ C0] ? do_raw_spin_unlock+0x13c/0x8b0 [ 174.035177][ C0] ? taprio_set_budgets+0x32c/0x370 [ 174.035196][ C0] ? advance_sched+0xa02/0xca0 [ 174.035215][ C0] ? advance_sched+0xa02/0xca0 [ 174.035236][ C0] _raw_spin_lock_irq+0xd3/0x120 [ 174.035255][ C0] ? __hrtimer_run_queues+0x65a/0xd00 [ 174.035272][ C0] ? __pfx__raw_spin_lock_irq+0x10/0x10 [ 174.035294][ C0] __hrtimer_run_queues+0x65a/0xd00 [ 174.035319][ C0] ? __pfx___hrtimer_run_queues+0x10/0x10 [ 174.035337][ C0] ? ktime_get_update_offsets_now+0x411/0x430 [ 174.035355][ C0] hrtimer_interrupt+0x396/0x990 [ 174.035381][ C0] __sysvec_apic_timer_interrupt+0x107/0x3a0 [ 174.035403][ C0] sysvec_apic_timer_interrupt+0xa1/0xc0 [ 174.035421][ C0] [ 174.035426][ C0] [ 174.035431][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 174.035447][ C0] RIP: 0010:acpi_safe_halt+0x21/0x30 [ 174.035461][ C0] Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 80 d0 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 15 1d 94 00 f3 0f 1e fa fb f4 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 [ 174.035472][ C0] RSP: 0018:ffffffff8de07ca8 EFLAGS: 00000246 [ 174.035485][ C0] RAX: ffffffff8de94680 RBX: ffff8880176ea864 RCX: 000000000001bc51 [ 174.035496][ C0] RDX: 0000000000000001 RSI: ffff8880176ea800 RDI: ffff8880176ea864 [ 174.035506][ C0] RBP: 000000000003a138 R08: ffff8880b9437d0b R09: 1ffff11017286fa1 [ 174.035521][ C0] R10: dffffc0000000000 R11: ffffffff8b746600 R12: ffff88801a31c000 [ 174.035532][ C0] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8e8a6e20 [ 174.035544][ C0] ? __pfx_acpi_idle_enter+0x10/0x10 [ 174.035568][ C0] acpi_idle_enter+0xe4/0x140 [ 174.035589][ C0] cpuidle_enter_state+0x118/0x490 [ 174.035608][ C0] ? __pfx_menu_select+0x10/0x10 [ 174.035626][ C0] cpuidle_enter+0x5d/0xa0 [ 174.035648][ C0] do_idle+0x375/0x5d0 [ 174.035663][ C0] ? __pfx___schedule+0x10/0x10 [ 174.035684][ C0] ? __pfx_do_idle+0x10/0x10 [ 174.035700][ C0] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 174.035719][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 174.035738][ C0] ? rest_init+0x35/0x300 [ 174.035751][ C0] ? rest_init+0x35/0x300 [ 174.035764][ C0] cpu_startup_entry+0x42/0x60 [ 174.035779][ C0] rest_init+0x2e0/0x300 [ 174.035792][ C0] ? __pfx_x86_late_time_init+0x10/0x10 [ 174.035808][ C0] arch_call_rest_init+0xe/0x10 [ 174.035826][ C0] start_kernel+0x47a/0x500 [ 174.035844][ C0] x86_64_start_reservations+0x2a/0x30 [ 174.035865][ C0] x86_64_start_kernel+0x99/0xa0 [ 174.035884][ C0] common_startup_64+0x13e/0x147 [ 174.035906][ C0] [ 174.035913][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.354 msecs [ 174.036553][ C1] rcu: rcu_preempt kthread timer wakeup didn't happen for 10502 jiffies! g6689 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x200 [ 174.554381][ C1] rcu: Possible timer handling issue on cpu=0 timer-softirq=3385 [ 174.562202][ C1] rcu: rcu_preempt kthread starved for 10503 jiffies! g6689 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x200 ->cpu=0 [ 174.573495][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 174.583574][ C1] rcu: RCU grace-period kthread stack dump: [ 174.589464][ C1] task:rcu_preempt state:R stack:25072 pid:16 tgid:16 ppid:2 flags:0x00004000 [ 174.599638][ C1] Call Trace: [ 174.602940][ C1] [ 174.605906][ C1] __schedule+0x17d3/0x4a20 [ 174.610466][ C1] ? __pfx___schedule+0x10/0x10 [ 174.615349][ C1] ? __pfx_lock_release+0x10/0x10 [ 174.620380][ C1] ? __asan_memset+0x23/0x50 [ 174.624982][ C1] ? __pfx_lockdep_init_map_type+0x10/0x10 [ 174.630794][ C1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 174.637157][ C1] ? schedule+0x90/0x320 [ 174.641412][ C1] schedule+0x14b/0x320 [ 174.645595][ C1] schedule_timeout+0x1be/0x310 [ 174.650458][ C1] ? __pfx_schedule_timeout+0x10/0x10 [ 174.655848][ C1] ? __pfx_process_timeout+0x10/0x10 [ 174.661149][ C1] ? prepare_to_swait_event+0x32e/0x350 [ 174.667326][ C1] rcu_gp_fqs_loop+0x2df/0x1370 [ 174.672186][ C1] ? lockdep_hardirqs_on+0x99/0x150 [ 174.677403][ C1] ? __pfx_rcu_gp_init+0x10/0x10 [ 174.682359][ C1] ? lockdep_hardirqs_on+0x99/0x150 [ 174.687566][ C1] ? __pfx_rcu_gp_fqs_loop+0x10/0x10 [ 174.692858][ C1] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 174.698862][ C1] ? finish_swait+0xd4/0x1e0 [ 174.703469][ C1] rcu_gp_kthread+0xa7/0x3b0 [ 174.708161][ C1] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 174.713394][ C1] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 174.719320][ C1] ? __kthread_parkme+0x169/0x1d0 [ 174.724797][ C1] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 174.730010][ C1] kthread+0x2f0/0x390 [ 174.734107][ C1] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 174.739338][ C1] ? __pfx_kthread+0x10/0x10 [ 174.743995][ C1] ret_from_fork+0x4b/0x80 [ 174.748438][ C1] ? __pfx_kthread+0x10/0x10 [ 174.753391][ C1] ret_from_fork_asm+0x1a/0x30 [ 174.758184][ C1]