./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3650180345 <...> Warning: Permanently added '10.128.1.38' (ED25519) to the list of known hosts. execve("./syz-executor3650180345", ["./syz-executor3650180345"], 0x7fff6da57090 /* 10 vars */) = 0 brk(NULL) = 0x55556197d000 brk(0x55556197de00) = 0x55556197de00 arch_prctl(ARCH_SET_FS, 0x55556197d480) = 0 set_tid_address(0x55556197d750) = 5821 set_robust_list(0x55556197d760, 24) = 0 rseq(0x55556197dda0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3650180345", 4096) = 28 getrandom("\x72\x4b\x5b\xe9\x65\xd6\xa5\xf0", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556197de00 brk(0x55556199ee00) = 0x55556199ee00 brk(0x55556199f000) = 0x55556199f000 mprotect(0x7f7c82f95000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55556197d750) = 5822 ./strace-static-x86_64: Process 5822 attached [pid 5821] openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC) = 3 [pid 5822] set_robust_list(0x55556197d760, 24 [pid 5821] write(3, "10000000000", 11 [pid 5822] <... set_robust_list resumed>) = 0 [pid 5821] <... write resumed>) = 11 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "20", 2) = 2 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "1", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "0", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "0", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "1", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "100", 3) = 3 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "0", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "0", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "7 4 1 3", 7) = 7 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "1", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "1", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "0", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "5822", 4) = 4 [pid 5821] close(3) = 0 [pid 5821] kill(5822, SIGKILL) = 0 [pid 5822] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5822, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7f7c82ecd350, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f7c82ed5310}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f7c82ecd350, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f7c82ed5310}, NULL, 8) = 0 mkdir("./syzkaller.7FPY6i", 0700) = 0 chmod("./syzkaller.7FPY6i", 0777) = 0 chdir("./syzkaller.7FPY6i") = 0 executing program write(1, "executing program\n", 18) = 18 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7c7aa00000 write(3, "\xeb\x52\x90\x4e\x54\x46\x53\x20\x20\x20\x20\x00\x10\x01\x00\x00\x00\x00\x00\x00\x00\xf8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x00\x80\x00\xff\x01\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\xff\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x78\x5f\xaa\x3b\xd7\x0e\xce\x68\x00\x00\x00\x00\x0e\x1f\xbe\x71\x7c\xac\x22\xc0\x74\x0b\x56\xb4\x0e\xbb\x07\x00"..., 2097152) = 2097152 munmap(0x7f7c7aa00000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file0", 0777) = 0 [ 72.376613][ T5821] loop0: detected capacity change from 0 to 4096 mount("/dev/loop0", "./file0", "ntfs3", MS_I_VERSION, "\x77\x69\x6e\x64\x6f\x77\x73\x5f\x6e\x61\x6d\x65\x73\x2c\x77\x69\x6e\x64\x6f\x77\x73\x5f\x6e\x61\x6d\x65\x73\x2c\x68\x69\x64\x65\x5f\x64\x6f\x74\x5f\x66\x69\x6c\x65\x73\x2c\x69\x6f\x63\x68\x61\x72\x73\x65\x74\x3d\x6d\x61\x63\x72\x6f\x6d\x61\x6e\x69\x61\x6e\x2c\x70\x72\x65\x61\x08") = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 mount(NULL, "./file0", "afs", MS_NOSYMFOLLOW|MS_NOATIME|0x200, "dyn,") = 0 [ 72.428723][ T5821] ntfs3: Unknown parameter 'prea' mount(NULL, "./file0", "overlay", 0, "lowerdir=./file0:/") = 0 chdir("./file0") = 0 open(".", O_RDONLY) = 3 openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = -1 EREMOTE (Object is remote) [ 72.510824][ T5821] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:321 [ 72.521577][ T5821] in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5821, name: syz-executor365 [ 72.531399][ T5821] preempt_count: 0, expected: 0 [ 72.536317][ T5821] RCU nest depth: 1, expected: 0 [ 72.541448][ T5821] 4 locks held by syz-executor365/5821: [ 72.547240][ T5821] #0: ffff888032b155f8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x310 getdents(3, NULL, 0) = -1 EINVAL (Invalid argument) exit_group(0) = ? +++ exited with 0 +++ [ 72.556375][ T5821] #1: ffff888077c90cf8 (&ovl_i_mutex_dir_key[depth]){++++}-{4:4}, at: wrap_directory_iterator+0x5a/0xd0 [ 72.568238][ T5821] #2: ffff88807d2c0148 (&type->i_mutex_dir_key#6){++++}-{4:4}, at: iterate_dir+0x4a6/0x760 [ 72.578531][ T5821] #3: ffffffff8eb3a760 (rcu_read_lock){....}-{1:3}, at: afs_dynroot_readdir+0x466/0xbe0 [ 72.588551][ T5821] CPU: 0 UID: 0 PID: 5821 Comm: syz-executor365 Not tainted 6.14.0-syzkaller-01103-g2df0c02dab82 #0 PREEMPT(full) [ 72.588580][ T5821] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 72.588597][ T5821] Call Trace: [ 72.588608][ T5821] [ 72.588618][ T5821] dump_stack_lvl+0x241/0x360 [ 72.588647][ T5821] ? __pfx_dump_stack_lvl+0x10/0x10 [ 72.588673][ T5821] __might_resched+0x558/0x6c0 [ 72.588699][ T5821] ? __pfx___might_resched+0x10/0x10 [ 72.588728][ T5821] ? __kmalloc_noprof+0xb7/0x4d0 [ 72.588746][ T5821] __kmalloc_noprof+0xd0/0x4d0 [ 72.588759][ T5821] ? ovl_cache_entry_new+0x39/0x7b0 [ 72.588778][ T5821] ovl_cache_entry_new+0x39/0x7b0 [ 72.588795][ T5821] ? __pfx_idr_get_next+0x10/0x10 [ 72.588822][ T5821] ovl_fill_merge+0x416/0x830 [ 72.588841][ T5821] afs_dynroot_readdir+0x814/0xbe0 [ 72.588875][ T5821] ? afs_dynroot_readdir+0x466/0xbe0 [ 72.588894][ T5821] ? __pfx_afs_dynroot_readdir+0x10/0x10 [ 72.588913][ T5821] ? vfs_open+0x31/0x370 [ 72.588929][ T5821] iterate_dir+0x5a9/0x760 [ 72.588952][ T5821] ovl_dir_read+0xfe/0x570 [ 72.588968][ T5821] ? ovl_path_next+0x23e/0x470 [ 72.588990][ T5821] ovl_dir_read_merged+0x315/0x5e0 [ 72.589010][ T5821] ? __pfx_ovl_dir_read_merged+0x10/0x10 [ 72.589027][ T5821] ? __pfx_ovl_fill_merge+0x10/0x10 [ 72.589050][ T5821] ? __kmalloc_cache_noprof+0x236/0x370 [ 72.589063][ T5821] ? ovl_iterate+0x10d6/0x21c0 [ 72.589081][ T5821] ovl_iterate+0x1196/0x21c0 [ 72.589101][ T5821] ? validate_chain+0x8a7/0x24e0 [ 72.589128][ T5821] ? __pfx_ovl_iterate+0x10/0x10 [ 72.589153][ T5821] ? __lock_acquire+0xad5/0xd80 [ 72.589185][ T5821] ? down_write+0x18d/0x220 [ 72.589207][ T5821] ? __pfx_down_write+0x10/0x10 [ 72.589230][ T5821] ? wrap_directory_iterator+0x52/0xd0 [ 72.589257][ T5821] ? __pfx_ovl_iterate+0x10/0x10 [ 72.589271][ T5821] wrap_directory_iterator+0x91/0xd0 [ 72.589293][ T5821] iterate_dir+0x5a9/0x760 [ 72.589316][ T5821] __se_sys_getdents+0x1ff/0x4e0 [ 72.589341][ T5821] ? __pfx___se_sys_getdents+0x10/0x10 [ 72.589362][ T5821] ? __pfx_filldir+0x10/0x10 [ 72.589391][ T5821] do_syscall_64+0xf3/0x230 [ 72.589413][ T5821] ? clear_bhb_loop+0x45/0xa0 [ 72.589430][ T5821] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 72.589445][ T5821] RIP: 0033:0x7f7c82f020f9 [ 72.589467][ T5821] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 72.589478][ T5821] RSP: 002b:00007fff5a9e9b58 EFLAGS: 00000246 ORIG_RAX: 000000000000004e [ 72.589494][ T5821] RAX: ffffffffffffffda RBX: 00007fff5a9e9c20 RCX: 00007f7c82f020f9 [ 72.589505][ T5821] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000