./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3766782864 <...> Warning: Permanently added '10.128.0.205' (ED25519) to the list of known hosts. execve("./syz-executor3766782864", ["./syz-executor3766782864"], 0x7ffcbbd69280 /* 10 vars */) = 0 brk(NULL) = 0x555556680000 brk(0x555556680d00) = 0x555556680d00 arch_prctl(ARCH_SET_FS, 0x555556680380) = 0 set_tid_address(0x555556680650) = 5009 set_robust_list(0x555556680660, 24) = 0 rseq(0x555556680ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3766782864", 4096) = 28 getrandom("\x07\x9e\xdd\xe3\x0a\x54\x05\x7d", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556680d00 brk(0x5555566a1d00) = 0x5555566a1d00 brk(0x5555566a2000) = 0x5555566a2000 mprotect(0x7f8796b36000, 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 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556680650) = 5010 ./strace-static-x86_64: Process 5010 attached [pid 5010] set_robust_list(0x555556680660, 24) = 0 [pid 5010] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5010] setpgid(0, 0) = 0 [pid 5010] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5010] write(3, "1000", 4) = 4 [pid 5010] close(3) = 0 [pid 5010] memfd_create("syzkaller", 0) = 3 [pid 5010] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f878e600000 [pid 5010] write(3, "\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\x00\x00"..., 32768) = 32768 [pid 5010] munmap(0x7f878e600000, 138412032) = 0 [pid 5010] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5010] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5010] close(3) = 0 [pid 5010] close(4) = 0 [pid 5010] mkdir("./bus", 0777) = 0 [pid 5010] mount("/dev/loop0", "./bus", "hfs", MS_NOSUID|MS_NOEXEC|MS_SYNCHRONOUS|MS_NOATIME|MS_SILENT|MS_I_VERSION, "\x63\x6f\x64\x65\x70\x61\x67\x65\x3d\x63\x70\x39\x33\x36\x2c\x64\x69\x72\x5f\x75\x6d\x61\x73\x6b\x3d\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x34\x36\x32\x35\x2c\x64\x69\x72\x5f\x75\x6d\x61\x73\x6b\x3d\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x37\x2c\x74\x79\x70\x65\x3d\x95\xc1\x09\x9e\x2c\x66\x69\x6c\x65\x5f\x75\x6d"...) = 0 [pid 5010] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5010] chdir("./bus") = 0 [pid 5010] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5010] mkdirat(AT_FDCWD, "./file0", 000) = 0 [ 146.815459][ T5010] loop0: detected capacity change from 0 to 64 [ 146.873285][ T5010] ===================================================== [ 146.881363][ T5010] BUG: KMSAN: uninit-value in hfs_revalidate_dentry+0x307/0x3f0 [ 146.889201][ T5010] hfs_revalidate_dentry+0x307/0x3f0 [ 146.894847][ T5010] lookup_fast+0x89e/0x8e0 [ 146.899435][ T5010] link_path_walk+0x817/0x1480 [ 146.904465][ T5010] path_lookupat+0xd9/0x6f0 [ 146.909154][ T5010] filename_lookup+0x22e/0x740 [ 146.914176][ T5010] user_path_at_empty+0x8b/0x390 [ 146.919309][ T5010] __se_sys_mount+0x66b/0x810 [ 146.924236][ T5010] __x64_sys_mount+0xe4/0x140 [ 146.929107][ T5010] do_syscall_64+0xcf/0x1e0 [ 146.933917][ T5010] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 146.940119][ T5010] [ 146.942535][ T5010] Uninit was created at: [ 146.946992][ T5010] __alloc_pages+0x9a6/0xe00 [ 146.951934][ T5010] new_slab+0x2d7/0x1400 [ 146.956355][ T5010] ___slab_alloc+0x16b5/0x3970 [ 146.961343][ T5010] kmem_cache_alloc_lru+0x64d/0xb30 [ 146.966715][ T5010] hfs_alloc_inode+0x5a/0xc0 [ 146.971546][ T5010] alloc_inode+0x83/0x440 [ 146.976032][ T5010] new_inode+0x38/0x4f0 [ 146.980479][ T5010] hfs_new_inode+0x61/0x1010 [ 146.985255][ T5010] hfs_mkdir+0x54/0x250 [ 146.989588][ T5010] vfs_mkdir+0x49a/0x700 [ 146.994385][ T5010] do_mkdirat+0x529/0x810 [ 146.998830][ T5010] __x64_sys_mkdirat+0xc8/0x120 [ 147.003969][ T5010] do_syscall_64+0xcf/0x1e0 [ 147.008648][ T5010] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 147.014960][ T5010] [ 147.017387][ T5010] CPU: 0 PID: 5010 Comm: syz-executor376 Not tainted 6.8.0-rc6-syzkaller-00278-g58c806d867bf #0 [ 147.028125][ T5010] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 147.038446][ T5010] ===================================================== [ 147.045628][ T5010] Disabling lock debugging due to kernel taint [ 147.051932][ T5010] Kernel panic - not syncing: kmsan.panic set ... [ 147.058405][ T5010] CPU: 0 PID: 5010 Comm: syz-executor376 Tainted: G B 6.8.0-rc6-syzkaller-00278-g58c806d867bf #0 [ 147.070408][ T5010] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 147.080569][ T5010] Call Trace: [ 147.083935][ T5010] [ 147.086945][ T5010] dump_stack_lvl+0x1bf/0x240 [ 147.091833][ T5010] dump_stack+0x1e/0x20 [ 147.096166][ T5010] panic+0x4de/0xc90 [ 147.100292][ T5010] kmsan_report+0x2d0/0x2d0 [ 147.104974][ T5010] ? kmsan_get_metadata+0x146/0x1c0 [ 147.110353][ T5010] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.116348][ T5010] ? __msan_warning+0x96/0x120 [ 147.121276][ T5010] ? hfs_revalidate_dentry+0x307/0x3f0 [ 147.126916][ T5010] ? lookup_fast+0x89e/0x8e0 [ 147.131599][ T5010] ? link_path_walk+0x817/0x1480 [ 147.136650][ T5010] ? path_lookupat+0xd9/0x6f0 [ 147.141529][ T5010] ? filename_lookup+0x22e/0x740 [ 147.146646][ T5010] ? user_path_at_empty+0x8b/0x390 [ 147.151875][ T5010] ? __se_sys_mount+0x66b/0x810 [ 147.156898][ T5010] ? __x64_sys_mount+0xe4/0x140 [ 147.161963][ T5010] ? do_syscall_64+0xcf/0x1e0 [ 147.166816][ T5010] ? entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 147.173050][ T5010] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.179024][ T5010] ? kmsan_get_metadata+0x146/0x1c0 [ 147.184399][ T5010] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.190398][ T5010] ? __d_lookup_rcu_op_compare+0x66e/0x6f0 [ 147.196412][ T5010] ? kmsan_get_metadata+0x146/0x1c0 [ 147.201728][ T5010] ? kmsan_get_metadata+0x146/0x1c0 [ 147.207086][ T5010] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 147.213489][ T5010] ? kmsan_get_metadata+0x146/0x1c0 [ 147.218841][ T5010] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.224771][ T5010] ? kmsan_get_metadata+0x146/0x1c0 [ 147.230122][ T5010] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.236057][ T5010] __msan_warning+0x96/0x120 [ 147.240819][ T5010] hfs_revalidate_dentry+0x307/0x3f0 [ 147.246258][ T5010] ? hfs_init_once+0x30/0x30 [ 147.251006][ T5010] lookup_fast+0x89e/0x8e0 [ 147.255605][ T5010] link_path_walk+0x817/0x1480 [ 147.260568][ T5010] path_lookupat+0xd9/0x6f0 [ 147.265287][ T5010] filename_lookup+0x22e/0x740 [ 147.270244][ T5010] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.276202][ T5010] user_path_at_empty+0x8b/0x390 [ 147.281356][ T5010] ? __se_sys_mount+0x644/0x810 [ 147.286349][ T5010] __se_sys_mount+0x66b/0x810 [ 147.291149][ T5010] ? _raw_spin_unlock_irq+0x31/0x50 [ 147.296497][ T5010] ? ptrace_notify+0x262/0x310 [ 147.301460][ T5010] ? kmsan_get_metadata+0x146/0x1c0 [ 147.306756][ T5010] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.312719][ T5010] __x64_sys_mount+0xe4/0x140 [ 147.317597][ T5010] do_syscall_64+0xcf/0x1e0 [ 147.322200][ T5010] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 147.328240][ T5010] RIP: 0033:0x7f8796ac2ad9 [ 147.332797][ T5010] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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 [ 147.352604][ T5010] RSP: 002b:00007ffcd174e2d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 147.361202][ T5010] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8796ac2ad9 [ 147.369304][ T5010] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000000 [ 147.377377][ T5010] RBP: 00007f8796b365f0 R08: 0000000000000000 R09: 00005555566814c0 [ 147.385496][ T5010] R10: 0000000000101091 R11: 0000000000000246 R12: 00007ffcd174e300 [ 147.393604][ T5010] R13: 00007ffcd174e528 R14: 431bde82d7b634db R15: 00007f8796b0b03b [ 147.401707][ T5010] [ 147.405151][ T5010] Kernel Offset: disabled [ 147.409526][ T5010] Rebooting in 86400 seconds..