./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor940367312 <...> Warning: Permanently added '10.128.0.134' (ED25519) to the list of known hosts. execve("./syz-executor940367312", ["./syz-executor940367312"], 0x7ffcd86b32c0 /* 10 vars */) = 0 brk(NULL) = 0x555589b59000 brk(0x555589b59d00) = 0x555589b59d00 arch_prctl(ARCH_SET_FS, 0x555589b59380) = 0 set_tid_address(0x555589b59650) = 5018 set_robust_list(0x555589b59660, 24) = 0 rseq(0x555589b59ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor940367312", 4096) = 27 getrandom("\xca\x19\x55\xcf\x7a\xbb\xbf\x16", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555589b59d00 brk(0x555589b7ad00) = 0x555589b7ad00 brk(0x555589b7b000) = 0x555589b7b000 mprotect(0x7f679dba1000, 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=0x555589b59650) = 5019 ./strace-static-x86_64: Process 5019 attached [pid 5019] set_robust_list(0x555589b59660, 24) = 0 [pid 5019] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5019] setpgid(0, 0) = 0 [pid 5019] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5019] write(3, "1000", 4) = 4 [pid 5019] close(3) = 0 [pid 5019] memfd_create("syzkaller", 0) = 3 [pid 5019] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6795600000 [pid 5019] 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"..., 524288) = 524288 [pid 5019] munmap(0x7f6795600000, 138412032) = 0 [pid 5019] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5019] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5019] close(3) = 0 [pid 5019] close(4) = 0 [pid 5019] mkdir("./file0", 0777) = 0 [pid 5019] mount("/dev/loop0", "./file0", "hfsplus", MS_NODEV|MS_NOEXEC|MS_I_VERSION, "\x66\x6f\x72\x63\x65\x2c\x6e\x6c\x73\x3d\x63\x70\x39\x33\x32\x2c\x62\x61\x72\x72\x69\x65\x72\x2c\x74\x79\x70\x65\x3d\xa0\x3b\x7f\x38\x2c\x75\x6d\x61\x73\x6b\x3d\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x31\x35\x31\x30\x30\x30\x2c\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\x31\x31\x31\x2c\x75\x69\x64\x3d\x30\x78"...) = 0 [pid 5019] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5019] chdir("./file0") = 0 [pid 5019] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5019] setxattr("./file0", "osx.t", NULL, 0, 0) = 0 [ 159.819154][ T5019] loop0: detected capacity change from 0 to 1024 [ 159.869649][ T5019] ===================================================== [ 159.876839][ T5019] BUG: KMSAN: uninit-value in strncmp+0x11e/0x180 [ 159.883650][ T5019] strncmp+0x11e/0x180 [ 159.887923][ T5019] hfsplus_listxattr+0x97d/0x1a60 [ 159.893250][ T5019] listxattr+0x1f3/0x6b0 [ 159.897892][ T5019] __x64_sys_listxattr+0x16b/0x2f0 [ 159.903308][ T5019] do_syscall_64+0xd5/0x1f0 [ 159.908042][ T5019] entry_SYSCALL_64_after_hwframe+0x72/0x7a [ 159.914365][ T5019] [ 159.916793][ T5019] Uninit was created at: [ 159.921500][ T5019] kmalloc_trace+0x578/0xba0 [ 159.926556][ T5019] hfsplus_listxattr+0x4cc/0x1a60 [ 159.931864][ T5019] listxattr+0x1f3/0x6b0 [ 159.936357][ T5019] __x64_sys_listxattr+0x16b/0x2f0 [ 159.941910][ T5019] do_syscall_64+0xd5/0x1f0 [ 159.946632][ T5019] entry_SYSCALL_64_after_hwframe+0x72/0x7a [ 159.952903][ T5019] [ 159.955338][ T5019] CPU: 0 PID: 5019 Comm: syz-executor940 Not tainted 6.9.0-rc3-syzkaller #0 [ 159.964398][ T5019] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 159.974690][ T5019] ===================================================== [ 159.981935][ T5019] Disabling lock debugging due to kernel taint [ 159.988312][ T5019] Kernel panic - not syncing: kmsan.panic set ... [ 159.995044][ T5019] CPU: 0 PID: 5019 Comm: syz-executor940 Tainted: G B 6.9.0-rc3-syzkaller #0 [ 160.005394][ T5019] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 160.015578][ T5019] Call Trace: [ 160.018964][ T5019] [ 160.021993][ T5019] dump_stack_lvl+0x216/0x2d0 [ 160.026913][ T5019] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 160.032913][ T5019] dump_stack+0x1e/0x30 [ 160.037205][ T5019] panic+0x4e2/0xcd0 [ 160.041263][ T5019] ? kmsan_get_metadata+0x51/0x1d0 [ 160.046533][ T5019] kmsan_report+0x2d5/0x2e0 [ 160.051168][ T5019] ? kmsan_get_metadata+0x146/0x1d0 [ 160.056531][ T5019] ? __msan_warning+0x95/0x120 [ 160.061532][ T5019] ? strncmp+0x11e/0x180 [ 160.066004][ T5019] ? hfsplus_listxattr+0x97d/0x1a60 [ 160.071560][ T5019] ? listxattr+0x1f3/0x6b0 [ 160.076182][ T5019] ? __x64_sys_listxattr+0x16b/0x2f0 [ 160.081643][ T5019] ? do_syscall_64+0xd5/0x1f0 [ 160.086547][ T5019] ? entry_SYSCALL_64_after_hwframe+0x72/0x7a [ 160.093030][ T5019] ? kmsan_get_metadata+0x146/0x1d0 [ 160.098518][ T5019] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 160.104513][ T5019] ? kmsan_get_metadata+0x146/0x1d0 [ 160.109895][ T5019] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 160.115872][ T5019] ? hfsplus_uni2asc+0x2300/0x2350 [ 160.121193][ T5019] ? _raw_spin_unlock_irqrestore+0x3f/0x60 [ 160.127227][ T5019] ? kmsan_get_metadata+0x146/0x1d0 [ 160.132652][ T5019] ? kmsan_get_metadata+0x146/0x1d0 [ 160.138112][ T5019] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 160.144071][ T5019] __msan_warning+0x95/0x120 [ 160.148897][ T5019] strncmp+0x11e/0x180 [ 160.153194][ T5019] hfsplus_listxattr+0x97d/0x1a60 [ 160.158438][ T5019] ? __msan_memset+0xf5/0x1b0 [ 160.163344][ T5019] ? stack_depot_save_flags+0x2c/0x6e0 [ 160.168981][ T5019] ? kmsan_get_metadata+0x146/0x1d0 [ 160.174368][ T5019] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 160.180376][ T5019] ? kmsan_get_metadata+0x146/0x1d0 [ 160.185765][ T5019] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 160.191783][ T5019] ? kmsan_get_metadata+0x146/0x1d0 [ 160.197262][ T5019] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 160.203244][ T5019] ? __pfx_hfsplus_listxattr+0x10/0x10 [ 160.208911][ T5019] ? __pfx_hfsplus_listxattr+0x10/0x10 [ 160.214515][ T5019] listxattr+0x1f3/0x6b0 [ 160.219091][ T5019] __x64_sys_listxattr+0x16b/0x2f0 [ 160.224527][ T5019] do_syscall_64+0xd5/0x1f0 [ 160.229224][ T5019] entry_SYSCALL_64_after_hwframe+0x72/0x7a [ 160.235642][ T5019] RIP: 0033:0x7f679db2ce99 [ 160.240248][ T5019] 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 [ 160.260426][ T5019] RSP: 002b:00007ffecf1fc9e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000c2 [ 160.269234][ T5019] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f679db2ce99 [ 160.277648][ T5019] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0 [ 160.285829][ T5019] RBP: 00007f679db7608a R08: 0000555589b5a4c0 R09: 0000555589b5a4c0 [ 160.293950][ T5019] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffecf1fca10 [ 160.302052][ T5019] R13: 00007ffecf1fcc38 R14: 431bde82d7b634db R15: 00007f679db7603b [ 160.310323][ T5019] [ 160.313676][ T5019] Kernel Offset: disabled [ 160.318057][ T5019] Rebooting in 86400 seconds..