./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor515079577 <...> Warning: Permanently added '10.128.1.145' (ED25519) to the list of known hosts. execve("./syz-executor515079577", ["./syz-executor515079577"], 0x7ffd7bc3f460 /* 10 vars */) = 0 brk(NULL) = 0x55557b3f7000 brk(0x55557b3f7d00) = 0x55557b3f7d00 arch_prctl(ARCH_SET_FS, 0x55557b3f7380) = 0 set_tid_address(0x55557b3f7650) = 5855 set_robust_list(0x55557b3f7660, 24) = 0 rseq(0x55557b3f7ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor515079577", 4096) = 27 getrandom("\x2d\xd3\x1a\x84\xa7\xca\x8d\xfc", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557b3f7d00 brk(0x55557b418d00) = 0x55557b418d00 brk(0x55557b419000) = 0x55557b419000 mprotect(0x7f9b61d3f000, 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 mkdir("./syzkaller.em98nT", 0700) = 0 chmod("./syzkaller.em98nT", 0777) = 0 chdir("./syzkaller.em98nT") = 0 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5856 attached , child_tidptr=0x55557b3f7650) = 5856 [pid 5856] set_robust_list(0x55557b3f7660, 24) = 0 [pid 5856] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5856] getppid() = 0 [pid 5856] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5856] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5856] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5856] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5856] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5856] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5856] unshare(CLONE_NEWNS) = 0 [pid 5856] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5856] unshare(CLONE_NEWIPC) = 0 [pid 5856] unshare(CLONE_NEWCGROUP) = 0 [pid 5856] unshare(CLONE_NEWUTS) = 0 [pid 5856] unshare(CLONE_SYSVSEM) = 0 [pid 5856] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5856] write(3, "16777216", 8) = 8 [pid 5856] close(3) = 0 [pid 5856] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5856] write(3, "536870912", 9) = 9 [pid 5856] close(3) = 0 [pid 5856] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5856] write(3, "1024", 4) = 4 [pid 5856] close(3) = 0 [pid 5856] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5856] write(3, "8192", 4) = 4 [pid 5856] close(3) = 0 [pid 5856] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5856] write(3, "1024", 4) = 4 [pid 5856] close(3) = 0 [pid 5856] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5856] write(3, "1024", 4) = 4 [pid 5856] close(3) = 0 [pid 5856] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5856] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5856] close(3) = 0 [pid 5856] getpid() = 1 [pid 5856] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 8b 36 4d 85 f6 0f 84 0d 05 00 00 e8 bd 9b 12 00 e9 d0 fa ff ff [ 217.555938][ C1] RSP: 0018:ffffc90000a18d40 EFLAGS: 00000046 [ 217.555956][ C1] RAX: 1ffff110170e5939 RBX: ffff8880b872c9c8 RCX: ffff88801d2e0000 [ 217.555968][ C1] RDX: 0000000000010000 RSI: 1ffff110170e5932 RDI: ffff88807c024340 [ 217.555980][ C1] RBP: ffffc90000a18ea0 R08: ffff88807c024357 R09: 0000000000000000 [ 217.555991][ C1] R10: ffff88807c024340 R11: ffffed100f80486b R12: 1ffff110170e593b [ 217.556003][ C1] R13: dffffc0000000000 R14: ffff8880b872c9d8 R15: ffff8880b872c880 [ 217.556015][ C1] FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 [ 217.556028][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 217.556039][ C1] CR2: 00007f9b61d4e090 CR3: 0000000076fde000 CR4: 00000000003526f0 [ 217.556053][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 217.556062][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 217.556072][ C1] Call Trace: [ 217.556079][ C1] [ 217.556088][ C1] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 217.556113][ C1] ? __pfx_lock_acquire+0x10/0x10 [ 217.556131][ C1] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 217.556148][ C1] ? nmi_handle+0x2a/0x5a0 [ 217.556171][ C1] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 217.556193][ C1] ? nmi_handle+0x14f/0x5a0 [ 217.556209][ C1] ? nmi_handle+0x2a/0x5a0 [ 217.556226][ C1] ? __hrtimer_run_queues+0x762/0xd50 [ 217.556245][ C1] ? default_do_nmi+0x63/0x160 [ 217.556264][ C1] ? exc_nmi+0x123/0x1f0 [ 217.556281][ C1] ? end_repeat_nmi+0xf/0x53 [ 217.556304][ C1] ? __hrtimer_run_queues+0x762/0xd50 [ 217.556324][ C1] ? __hrtimer_run_queues+0x762/0xd50 [ 217.556344][ C1] ? __hrtimer_run_queues+0x762/0xd50 [ 217.556363][ C1] [ 217.556369][ C1] [ 217.556382][ C1] ? __pfx___hrtimer_run_queues+0x10/0x10 [ 217.556402][ C1] ? read_tsc+0x9/0x20 [ 217.556422][ C1] ? ktime_get_update_offsets_now+0x393/0x3b0 [ 217.556441][ C1] hrtimer_interrupt+0x403/0xa40 [ 217.556470][ C1] __sysvec_apic_timer_interrupt+0x110/0x420 [ 217.556489][ C1] sysvec_apic_timer_interrupt+0xa1/0xc0 [ 217.556510][ C1] [ 217.556515][ C1] [ 217.556521][ C1] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 217.556540][ C1] RIP: 0010:acpi_safe_halt+0x21/0x30 [ 217.556557][ C1] Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 d4 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 85 dd 97 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 [ 217.556570][ C1] RSP: 0018:ffffc900001a7d08 EFLAGS: 00000246 [ 217.556583][ C1] RAX: ffff88801d2e0000 RBX: ffff888144ab8864 RCX: 000000000002fcf9 [ 217.556595][ C1] RDX: 0000000000000001 RSI: ffff888144ab8800 RDI: ffff888144ab8864 [ 217.556606][ C1] RBP: 000000000003a8b8 R08: ffff8880b8737cdb R09: 1ffff110170e6f9b [ 217.556617][ C1] R10: dffffc0000000000 R11: ffffffff8bd34f50 R12: ffff888147ef7000 [ 217.556628][ C1] R13: 0000000000000001 R14: 0000000000000001 R15: ffffffff8f13dd60 [ 217.556641][ C1] ? __pfx_acpi_idle_enter+0x10/0x10 [ 217.556661][ C1] acpi_idle_enter+0xe4/0x140 [ 217.556679][ C1] cpuidle_enter_state+0x109/0x470 [ 217.556694][ C1] ? __pfx_menu_select+0x10/0x10 [ 217.556714][ C1] cpuidle_enter+0x5d/0xa0 [ 217.556738][ C1] do_idle+0x372/0x5c0 [ 217.556763][ C1] ? __pfx_do_idle+0x10/0x10 [ 217.556795][ C1] cpu_startup_entry+0x42/0x60 [ 217.556816][ C1] start_secondary+0x102/0x110 [ 217.556837][ C1] common_startup_64+0x13e/0x147 [ 217.556862][ C1] [ 217.556869][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.054 msecs [ 217.557808][ C0] rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g9093 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 [ 217.966642][ C0] rcu: Possible timer handling issue on cpu=1 timer-softirq=5347 [ 217.974453][ C0] rcu: rcu_preempt kthread starved for 10500 jiffies! g9093 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 217.985762][ C0] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 217.995749][ C0] rcu: RCU grace-period kthread stack dump: [ 218.001654][ C0] task:rcu_preempt state:I stack:25976 pid:17 tgid:17 ppid:2 flags:0x00004000 [ 218.011865][ C0] Call Trace: [ 218.015157][ C0] [ 218.018099][ C0] __schedule+0x1850/0x4c30 [ 218.022654][ C0] ? __pfx___schedule+0x10/0x10 [ 218.027523][ C0] ? __pfx_lock_release+0x10/0x10 [ 218.032574][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 218.038919][ C0] ? schedule+0x90/0x320 [ 218.043174][ C0] schedule+0x14b/0x320 [ 218.047347][ C0] schedule_timeout+0x15a/0x290 [ 218.052212][ C0] ? __pfx_schedule_timeout+0x10/0x10 [ 218.057607][ C0] ? __pfx_process_timeout+0x10/0x10 [ 218.062921][ C0] ? prepare_to_swait_event+0x330/0x350 [ 218.068482][ C0] rcu_gp_fqs_loop+0x2df/0x1330 [ 218.073344][ C0] ? lockdep_hardirqs_on+0x99/0x150 [ 218.078568][ C0] ? __pfx_rcu_watching_snap_save+0x10/0x10 [ 218.084473][ C0] ? __pfx_rcu_gp_fqs_loop+0x10/0x10 [ 218.089770][ C0] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 218.095691][ C0] ? finish_swait+0xd4/0x1e0 [ 218.100293][ C0] rcu_gp_kthread+0xa7/0x3b0 [ 218.104906][ C0] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 218.110112][ C0] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 218.116026][ C0] ? __kthread_parkme+0x169/0x1d0 [ 218.121083][ C0] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 218.126314][ C0] kthread+0x2f0/0x390 [ 218.130413][ C0] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 218.135632][ C0] ? __pfx_kthread+0x10/0x10 [ 218.140243][ C0] ret_from_fork+0x4b/0x80 [ 218.144683][ C0] ? __pfx_kthread+0x10/0x10 [ 218.149285][ C0] ret_from_fork_asm+0x1a/0x30 [ 218.154085][ C0]