./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4107910736 <...> Warning: Permanently added '10.128.0.210' (ED25519) to the list of known hosts. execve("./syz-executor4107910736", ["./syz-executor4107910736"], 0x7ffd8ffa2d40 /* 10 vars */) = 0 brk(NULL) = 0x5555702df000 brk(0x5555702dfd40) = 0x5555702dfd40 arch_prctl(ARCH_SET_FS, 0x5555702df3c0) = 0 set_tid_address(0x5555702df690) = 296 set_robust_list(0x5555702df6a0, 24) = 0 rseq(0x5555702dfce0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4107910736", 4096) = 28 getrandom("\x6e\xbe\xb9\x2a\x0c\x45\xaa\x5b", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555702dfd40 brk(0x555570300d40) = 0x555570300d40 brk(0x555570301000) = 0x555570301000 mprotect(0x7ff09941d000, 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, 0executing program ) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 297 attached , child_tidptr=0x5555702df690) = 297 [pid 297] set_robust_list(0x5555702df6a0, 24) = 0 [pid 297] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 297] setpgid(0, 0) = 0 [pid 297] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 297] write(3, "1000", 4) = 4 [pid 297] close(3) = 0 [pid 297] write(1, "executing program\n", 18) = 18 [pid 297] futex(0x7ff0994233ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 297] rt_sigaction(SIGRT_1, {sa_handler=0x7ff0993bf720, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7ff0993b0da0}, NULL, 8) = 0 [pid 297] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 297] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7ff099326000 [pid 297] mprotect(0x7ff099327000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 297] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 297] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7ff099346990, parent_tid=0x7ff099346990, exit_signal=0, stack=0x7ff099326000, stack_size=0x20300, tls=0x7ff0993466c0} => {parent_tid=[298]}, 88) = 298 [pid 297] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 297] futex(0x7ff0994233e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 297] futex(0x7ff0994233ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 298 attached [pid 298] set_robust_list(0x7ff0993469a0, 24) = 0 [pid 298] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 298] mknodat(AT_FDCWD, "./file0", 000) = 0 [pid 298] futex(0x7ff0994233ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 297] <... futex resumed>) = 0 [pid 298] futex(0x7ff0994233e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 297] futex(0x7ff0994233e8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 298] <... futex resumed>) = 0 [pid 297] futex(0x7ff0994233ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 298] setsockopt(-1, SOL_XDP, XDP_TX_RING, [2048], 4) = -1 EBADF (Bad file descriptor) [pid 298] futex(0x7ff0994233ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 298] futex(0x7ff0994233e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 297] <... futex resumed>) = 0 [pid 298] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 297] futex(0x7ff0994233e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 298] pipe2( [pid 297] <... futex resumed>) = 0 [pid 298] <... pipe2 resumed>[3, 4], 0) = 0 [pid 297] futex(0x7ff0994233ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 298] futex(0x7ff0994233ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 297] <... futex resumed>) = 0 [pid 298] futex(0x7ff0994233e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 297] futex(0x7ff0994233e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 298] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 297] <... futex resumed>) = 0 [pid 298] write(4, "\x15\x00\x00\x00\x65\xff\xff\x01\x7f\x00\x0e\x08\x00\x39\x50\x32\x30\x30\x30\x00\x00", 21 [pid 297] futex(0x7ff0994233ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 298] <... write resumed>) = 21 [pid 298] futex(0x7ff0994233ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 297] <... futex resumed>) = 0 [pid 297] futex(0x7ff0994233e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 297] futex(0x7ff0994233ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 298] <... futex resumed>) = 1 [pid 298] dup(4) = 5 [pid 298] futex(0x7ff0994233ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 297] <... futex resumed>) = 0 [pid 298] write(5, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 24 [pid 297] futex(0x7ff0994233e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 298] <... write resumed>) = 24 [pid 297] <... futex resumed>) = 0 [pid 298] futex(0x7ff0994233ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 297] futex(0x7ff0994233ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 298] <... futex resumed>) = 0 [pid 298] futex(0x7ff0994233e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 297] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 297] futex(0x7ff0994233e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 298] <... futex resumed>) = 0 [pid 297] <... futex resumed>) = 1 [pid 298] write(5, "\x00\x08\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 176) = 176 [pid 298] futex(0x7ff0994233ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 297] futex(0x7ff0994233ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 298] <... futex resumed>) = 0 [pid 298] futex(0x7ff0994233e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 297] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 297] futex(0x7ff0994233e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 298] <... futex resumed>) = 0 [pid 297] <... futex resumed>) = 1 [pid 298] mount(NULL, "./file0", "9p", 0, "trans=fd,rfdno=0x0000000000000003,wfdno=0x0000000000000005,dfltuid=0x0000000000000000," [pid 297] futex(0x7ff0994233ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 297] futex(0x7ff0994233fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 297] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7ff099305000 [pid 297] mprotect(0x7ff099306000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 297] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 297] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7ff099325990, parent_tid=0x7ff099325990, exit_signal=0, stack=0x7ff099305000, stack_size=0x20300, tls=0x7ff0993256c0}./strace-static-x86_64: Process 300 attached [pid 300] set_robust_list(0x7ff0993259a0, 24 [pid 297] <... clone3 resumed> => {parent_tid=[300]}, 88) = 300 [pid 300] <... set_robust_list resumed>) = 0 [pid 300] rt_sigprocmask(SIG_SETMASK, [], [pid 297] rt_sigprocmask(SIG_SETMASK, [], [pid 300] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 297] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 300] sync( [pid 297] futex(0x7ff0994233f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 103.352002][ T36] audit: type=1400 audit(1750614372.680:64): avc: denied { execmem } for pid=296 comm="syz-executor410" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 103.371671][ T36] audit: type=1400 audit(1750614372.690:65): avc: denied { mounton } for pid=297 comm="syz-executor410" path="/root/file0" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=file permissive=1 [pid 297] futex(0x7ff0994233fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 297] exit_group(0) = ? [pid 296] kill(-297, SIGKILL) = 0 [pid 296] kill(297, SIGKILL) = 0 [pid 296] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 296] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 296] getdents64(3, 0x5555702e0730 /* 2 entries */, 32768) = 48 [pid 296] getdents64(3, 0x5555702e0730 /* 0 entries */, 32768) = 0 [pid 296] close(3) = 0 [ 244.705280][ T37] INFO: task syz-executor410:300 blocked for more than 122 seconds. [ 244.713327][ T37] Not tainted 6.12.23-syzkaller-gd9fd901baa98 #0 [ 244.720237][ T37] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 244.728951][ T37] task:syz-executor410 state:D stack:0 pid:300 tgid:297 ppid:296 flags:0x00004004 [ 244.739162][ T37] Call Trace: [ 244.742486][ T37] [ 244.745440][ T37] __schedule+0x145b/0x1f10 [ 244.749992][ T37] ? __sched_text_start+0x10/0x10 [ 244.755064][ T37] ? _raw_spin_lock_irqsave+0xaf/0x150 [ 244.760546][ T37] ? mutex_unlock+0x8b/0x240 [ 244.765168][ T37] ? _raw_spin_unlock_irqrestore+0x4a/0x70 [ 244.770999][ T37] schedule+0xc6/0x240 [ 244.775109][ T37] super_lock+0x150/0x300 [ 244.779453][ T37] ? user_get_super+0x350/0x350 [ 244.784386][ T37] ? __cfi_var_wake_function+0x10/0x10 [ 244.789872][ T37] ? __kasan_check_write+0x18/0x20 [ 244.794995][ T37] iterate_supers+0x8a/0x560 [ 244.799632][ T37] ? __cfi_sync_inodes_one_sb+0x10/0x10 [ 244.805241][ T37] ksys_sync+0x95/0x160 [ 244.809422][ T37] ? __cfi_ksys_sync+0x10/0x10 [ 244.814185][ T37] __ia32_sys_sync+0x12/0x20 [ 244.818803][ T37] x64_sys_call+0x2a58/0x2ee0 [ 244.823506][ T37] do_syscall_64+0x58/0xf0 [ 244.827972][ T37] ? clear_bhb_loop+0x35/0x90 [ 244.832675][ T37] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 244.838608][ T37] RIP: 0033:0x7ff0993997e9 [ 244.843044][ T37] RSP: 002b:00007ff099325218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 [ 244.851489][ T37] RAX: ffffffffffffffda RBX: 00007ff0994233f8 RCX: 00007ff0993997e9 [ 244.859520][ T37] RDX: 00007ff099375e86 RSI: 0000000000000000 RDI: 00007ff099325fb0 [ 244.867534][ T37] RBP: 00007ff0994233f0 R08: 00007ffd5213d007 R09: 0000000000000000 [ 244.875540][ T37] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff0993f007c [ 244.883513][ T37] R13: 000000000000006e R14: 0030656c69662f2e R15: 00002000000002c0 [ 244.891536][ T37] [ 244.894586][ T37] NMI backtrace for cpu 1 [ 244.894599][ T37] CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.23-syzkaller-gd9fd901baa98 #0 f1acc3ef52b3e732a05c4f7a2560722db90bb473 [ 244.894621][ T37] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 244.894630][ T37] Call Trace: [ 244.894635][ T37] [ 244.894640][ T37] __dump_stack+0x21/0x30 [ 244.894661][ T37] dump_stack_lvl+0x10c/0x190 [ 244.894679][ T37] ? __cfi_dump_stack_lvl+0x10/0x10 [ 244.894698][ T37] dump_stack+0x19/0x20 [ 244.894714][ T37] nmi_cpu_backtrace+0x2bf/0x2d0 [ 244.894734][ T37] ? __cfi_nmi_cpu_backtrace+0x10/0x10 [ 244.894753][ T37] ? sched_show_task+0x379/0x560 [ 244.894770][ T37] ? __cfi_nmi_raise_cpu_backtrace+0x10/0x10 [ 244.894785][ T37] ? __cfi_nmi_raise_cpu_backtrace+0x10/0x10 [ 244.894801][ T37] nmi_trigger_cpumask_backtrace+0x142/0x2c0 [ 244.894824][ T37] arch_trigger_cpumask_backtrace+0x14/0x20 [ 244.894839][ T37] watchdog+0xd8f/0xed0 [ 244.894856][ T37] ? __cfi_watchdog+0x10/0x10 [ 244.894871][ T37] ? __kasan_check_read+0x15/0x20 [ 244.894888][ T37] ? __kthread_parkme+0x138/0x180 [ 244.894908][ T37] ? schedule+0xc6/0x240 [ 244.894929][ T37] kthread+0x2c7/0x370 [ 244.894949][ T37] ? __cfi_watchdog+0x10/0x10 [ 244.894964][ T37] ? __cfi_kthread+0x10/0x10 [ 244.894985][ T37] ret_from_fork+0x64/0xa0 [ 244.895002][ T37] ? __cfi_kthread+0x10/0x10 [ 244.895026][ T37] ret_from_fork_asm+0x1a/0x30 [ 244.895047][ T37] [ 245.039712][ T37] Sending NMI from CPU 1 to CPUs 0: [ 245.044962][ C0] NMI backtrace for cpu 0 skipped: idling at default_idle+0x17/0x20