./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4084751291 <...> Warning: Permanently added '10.128.0.217' (ED25519) to the list of known hosts. execve("./syz-executor4084751291", ["./syz-executor4084751291"], 0x7ffd75971940 /* 10 vars */) = 0 brk(NULL) = 0x5555561cd000 brk(0x5555561cdd00) = 0x5555561cdd00 arch_prctl(ARCH_SET_FS, 0x5555561cd380) = 0 set_tid_address(0x5555561cd650) = 5065 set_robust_list(0x5555561cd660, 24) = 0 rseq(0x5555561cdca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4084751291", 4096) = 28 getrandom("\xdf\xf3\x0e\x69\x56\xcb\xe4\x69", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555561cdd00 brk(0x5555561eed00) = 0x5555561eed00 brk(0x5555561ef000) = 0x5555561ef000 mprotect(0x7fd21a370000, 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, child_tidptr=0x5555561cd650) = 5066 ./strace-static-x86_64: Process 5066 attached [pid 5066] set_robust_list(0x5555561cd660, 24) = 0 [pid 5066] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5066] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5066] setsid() = 1 [pid 5066] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5066] unshare(CLONE_NEWNS) = 0 [pid 5066] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5066] unshare(CLONE_NEWIPC) = 0 [pid 5066] unshare(CLONE_NEWCGROUP) = 0 [pid 5066] unshare(CLONE_NEWUTS) = 0 [pid 5066] unshare(CLONE_SYSVSEM) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "16777216", 8) = 8 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "536870912", 9) = 9 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1024", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "8192", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1024", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1024", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5066] close(3) = 0 [pid 5066] getpid() = 1 [pid 5066] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5066] kill(-3, SIGKILL) = 0 [pid 5066] kill(3, SIGKILL) = 0 [pid 5066] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5066] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5066] getdents64(3, 0x5555561ce6f0 /* 2 entries */, 32768) = 48 [pid 5066] getdents64(3, 0x5555561ce6f0 /* 0 entries */, 32768) = 0 [pid 5066] close(3) = 0 [ 113.586583][ T781] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-...D } 2643 jiffies s: 541 root: 0x2/. [ 113.601654][ T781] rcu: blocking rcu_node structures (internal RCU debug): [ 113.609706][ T781] Sending NMI from CPU 0 to CPUs 1: [ 113.614943][ C1] NMI backtrace for cpu 1 [ 113.614954][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.8.0-rc1-syzkaller-00209-gc9ec85153fea #0 [ 113.614977][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 113.614989][ C1] RIP: 0010:lock_release+0x126/0x690 [ 113.615044][ C1] Code: 85 ad 02 00 00 65 4c 8b 34 25 80 c2 03 00 49 8d be bc 0a 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f0 04 00 00 41 [ 113.615065][ C1] RSP: 0018:ffffc900001f0d60 EFLAGS: 00000803 [ 113.615082][ C1] RAX: dffffc0000000000 RBX: ffffffff8f9e3658 RCX: ffffffff816bd1f5 [ 113.615097][ C1] RDX: 0000000000000000 RSI: ffffffff8b6eb140 RDI: ffff888017a8463c [ 113.615111][ C1] RBP: 1ffff9200003e1ae R08: 0000000000000000 R09: fffffbfff1f3c052 [ 113.615125][ C1] R10: ffffffff8f9e0297 R11: 0000000000000001 R12: ffff8880b952bad8 [ 113.615139][ C1] R13: 17af915c6f63d692 R14: ffff888017a83b80 R15: ffffffff88db8b90 [ 113.615154][ C1] FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 [ 113.615175][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 113.615190][ C1] CR2: 0000000020000600 CR3: 0000000079350000 CR4: 00000000003506f0 [ 113.615204][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 113.615217][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 113.615230][ C1] Call Trace: [ 113.615236][ C1] [ 113.615243][ C1] ? show_regs+0x8f/0xa0 [ 113.615276][ C1] ? nmi_cpu_backtrace+0x1d8/0x390 [ 113.615317][ C1] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 113.615351][ C1] ? nmi_handle+0x1a9/0x580 [ 113.615371][ C1] ? lock_release+0x126/0x690 [ 113.615404][ C1] ? default_do_nmi+0x6a/0x160 [ 113.615441][ C1] ? exc_nmi+0x18a/0x210 [ 113.615460][ C1] ? end_repeat_nmi+0xf/0x60 [ 113.615486][ C1] ? __pfx_advance_sched+0x10/0x10 [ 113.615520][ C1] ? lock_release+0xa5/0x690 [ 113.615553][ C1] ? lock_release+0x126/0x690 [ 113.615585][ C1] ? lock_release+0x126/0x690 [ 113.615618][ C1] ? lock_release+0x126/0x690 [ 113.615650][ C1] [ 113.615655][ C1] [ 113.615662][ C1] ? __hrtimer_run_queues+0x58e/0xc30 [ 113.615684][ C1] ? __pfx_lock_release+0x10/0x10 [ 113.615720][ C1] ? timerqueue_del+0x83/0x150 [ 113.615753][ C1] ? __pfx_advance_sched+0x10/0x10 [ 113.615783][ C1] _raw_spin_unlock_irqrestore+0x1a/0x80 [ 113.615806][ C1] __hrtimer_run_queues+0x58e/0xc30 [ 113.615833][ C1] ? __pfx___hrtimer_run_queues+0x10/0x10 [ 113.615854][ C1] ? ktime_get_update_offsets_now+0x3bd/0x620 [ 113.615891][ C1] hrtimer_interrupt+0x31b/0x800 [ 113.615921][ C1] __sysvec_apic_timer_interrupt+0x108/0x400 [ 113.615956][ C1] sysvec_apic_timer_interrupt+0x90/0xb0 [ 113.615981][ C1] [ 113.615986][ C1] [ 113.615992][ C1] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 113.616020][ C1] RIP: 0010:acpi_safe_halt+0x1b/0x30 [ 113.616053][ C1] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 80 c2 03 00 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 87 07 b6 00 fb f4 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 [ 113.616072][ C1] RSP: 0018:ffffc90000187d58 EFLAGS: 00000246 [ 113.616088][ C1] RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff8ac3d9ab [ 113.616101][ C1] RDX: 0000000000000001 RSI: ffff88801c6c1000 RDI: ffff88801c6c1064 [ 113.616115][ C1] RBP: ffff88801c6c1064 R08: 0000000000000001 R09: ffffed10172a6ded [ 113.616129][ C1] R10: ffff8880b9536f6b R11: 0000000000000000 R12: ffff88801cb59800 [ 113.616143][ C1] R13: ffffffff8e31aa00 R14: 0000000000000001 R15: 0000000000000000 [ 113.616161][ C1] ? ct_kernel_exit+0x13b/0x190 [ 113.616192][ C1] acpi_idle_enter+0xc5/0x160 [ 113.616226][ C1] cpuidle_enter_state+0x85/0x510 [ 113.616260][ C1] cpuidle_enter+0x4e/0xa0 [ 113.616282][ C1] do_idle+0x31d/0x400 [ 113.616307][ C1] ? __pfx_do_idle+0x10/0x10 [ 113.616339][ C1] cpu_startup_entry+0x50/0x60 [ 113.616363][ C1] start_secondary+0x220/0x2b0 [ 113.616390][ C1] ? __pfx_start_secondary+0x10/0x10 [ 113.616421][ C1] secondary_startup_64_no_verify+0x170/0x17b [ 113.616461][ C1] [ 113.616468][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.525 msecs