./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3773403823 <...> Warning: Permanently added '10.128.0.106' (ED25519) to the list of known hosts. execve("./syz-executor3773403823", ["./syz-executor3773403823"], 0x7ffd8982c460 /* 10 vars */) = 0 brk(NULL) = 0x55556ed7e000 brk(0x55556ed7ed00) = 0x55556ed7ed00 arch_prctl(ARCH_SET_FS, 0x55556ed7e380) = 0 set_tid_address(0x55556ed7e650) = 5780 set_robust_list(0x55556ed7e660, 24) = 0 rseq(0x55556ed7eca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3773403823", 4096) = 28 getrandom("\x73\x2c\x74\x87\xa7\xed\x4d\xda", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556ed7ed00 brk(0x55556ed9fd00) = 0x55556ed9fd00 brk(0x55556eda0000) = 0x55556eda0000 mprotect(0x7f0ca89be000, 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 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=0x55556ed7e650) = 5781 ./strace-static-x86_64: Process 5781 attached [pid 5781] set_robust_list(0x55556ed7e660, 24) = 0 [pid 5781] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5781] setpgid(0, 0) = 0 [pid 5781] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5781] write(3, "1000", 4) = 4 [pid 5781] close(3) = 0 executing program [pid 5781] write(1, "executing program\n", 18) = 18 [pid 5781] sendmsg(-1, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="", iov_len=0}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = -1 EBADF (Bad file descriptor) [pid 5781] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address) [pid 5781] sendmmsg(-1, NULL, 0, 0) = -1 EBADF (Bad file descriptor) [pid 5781] memfd_create("syzkaller", 0) = 3 [pid 5781] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0ca0400000 [pid 5781] 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"..., 16777216) = 16777216 [pid 5781] munmap(0x7f0ca0400000, 138412032) = 0 [pid 5781] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5781] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5781] close(3) = 0 [pid 5781] close(4) = 0 [pid 5781] mkdir("./bus", 0777) = 0 [pid 5781] mount("/dev/loop0", "./bus", "jfs", MS_NOSUID|MS_NOEXEC, "") = 0 [ 188.882012][ T5781] loop0: detected capacity change from 0 to 32768 [pid 5781] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5781] chdir("./bus") = 0 [pid 5781] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5781] openat(AT_FDCWD, "hugetlb.2MB.usage_in_bytes", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 4 [ 188.936789][ T5781] ERROR: (device loop0): dtSearch: stack overrun! [ 188.936789][ T5781] [ 188.948084][ T5781] ERROR: (device loop0): remounting filesystem as read-only [ 188.955643][ T5781] btstack dump: [ 188.959476][ T5781] bn = 0, index = 0 [ 188.963497][ T5781] bn = 0, index = 0 [ 188.967578][ T5781] bn = 0, index = 0 [ 188.971592][ T5781] bn = 0, index = 0 [ 188.975607][ T5781] bn = 0, index = 0 [ 188.979840][ T5781] bn = 0, index = 0 [ 188.983838][ T5781] bn = 0, index = 0 [ 188.987900][ T5781] ===================================================== [ 188.995091][ T5781] BUG: KMSAN: uninit-value in BT_STACK_DUMP+0x5e5/0x600 [ 189.002360][ T5781] BT_STACK_DUMP+0x5e5/0x600 [ 189.007240][ T5781] dtSearch+0x393f/0x3d30 [ 189.011763][ T5781] jfs_lookup+0x179/0x590 [ 189.016406][ T5781] lookup_one_qstr_excl_raw+0x204/0x5b0 [ 189.022177][ T5781] do_unlinkat+0x2e3/0xe50 [ 189.026863][ T5781] __x64_sys_unlink+0x71/0xb0 [ 189.031766][ T5781] x64_sys_call+0x29de/0x3db0 [ 189.036831][ T5781] do_syscall_64+0xd9/0x1b0 [ 189.041553][ T5781] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 189.047825][ T5781] [ 189.050261][ T5781] Local variable nd created at: [ 189.055242][ T5781] __filename_parentat+0x4c/0x990 [ 189.060697][ T5781] do_unlinkat+0xe3/0xe50 [ 189.065232][ T5781] [ 189.067811][ T5781] CPU: 1 UID: 0 PID: 5781 Comm: syz-executor377 Not tainted 6.15.0-rc3-syzkaller-00094-g02ddfb981de8 #0 PREEMPT(undef) [ 189.080589][ T5781] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 189.090895][ T5781] ===================================================== [ 189.098039][ T5781] Disabling lock debugging due to kernel taint [ 189.104265][ T5781] Kernel panic - not syncing: kmsan.panic set ... [ 189.110769][ T5781] CPU: 1 UID: 0 PID: 5781 Comm: syz-executor377 Tainted: G B 6.15.0-rc3-syzkaller-00094-g02ddfb981de8 #0 PREEMPT(undef) [ 189.125090][ T5781] Tainted: [B]=BAD_PAGE [ 189.129395][ T5781] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 189.139645][ T5781] Call Trace: [ 189.143018][ T5781] [ 189.146049][ T5781] __dump_stack+0x26/0x30 [ 189.150561][ T5781] dump_stack_lvl+0x53/0x270 [ 189.155294][ T5781] ? kmsan_get_shadow_origin_ptr+0x4a/0xb0 [ 189.161285][ T5781] dump_stack+0x1e/0x25 [ 189.165603][ T5781] panic+0x4bd/0xd50 [ 189.169648][ T5781] kmsan_report+0x29d/0x2a0 [ 189.174303][ T5781] ? kmsan_get_metadata+0x105/0x1b0 [ 189.179693][ T5781] ? kmsan_internal_set_shadow_origin+0x79/0x110 [ 189.186179][ T5781] ? __msan_warning+0x96/0x120 [ 189.191058][ T5781] ? BT_STACK_DUMP+0x5e5/0x600 [ 189.195961][ T5781] ? dtSearch+0x393f/0x3d30 [ 189.200647][ T5781] ? jfs_lookup+0x179/0x590 [ 189.205281][ T5781] ? lookup_one_qstr_excl_raw+0x204/0x5b0 [ 189.211152][ T5781] ? do_unlinkat+0x2e3/0xe50 [ 189.215858][ T5781] ? __x64_sys_unlink+0x71/0xb0 [ 189.220851][ T5781] ? x64_sys_call+0x29de/0x3db0 [ 189.225842][ T5781] ? do_syscall_64+0xd9/0x1b0 [ 189.230730][ T5781] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 189.237001][ T5781] ? vprintk_emit+0xab3/0xcd0 [ 189.241850][ T5781] ? vprintk_default+0x3f/0x50 [ 189.246827][ T5781] ? vprintk+0x36/0x50 [ 189.251029][ T5781] ? _printk+0x17e/0x1b0 [ 189.255438][ T5781] ? kmsan_get_metadata+0x105/0x1b0 [ 189.260787][ T5781] __msan_warning+0x96/0x120 [ 189.265557][ T5781] BT_STACK_DUMP+0x5e5/0x600 [ 189.270342][ T5781] dtSearch+0x393f/0x3d30 [ 189.274883][ T5781] jfs_lookup+0x179/0x590 [ 189.279350][ T5781] ? kmsan_internal_set_shadow_origin+0x79/0x110 [ 189.285818][ T5781] ? pages_to_scan_store+0x80/0x160 [ 189.291187][ T5781] ? _raw_spin_unlock+0x30/0x50 [ 189.296179][ T5781] ? kmsan_get_shadow_origin_ptr+0x4a/0xb0 [ 189.302205][ T5781] ? __pfx_jfs_lookup+0x10/0x10 [ 189.307185][ T5781] lookup_one_qstr_excl_raw+0x204/0x5b0 [ 189.312914][ T5781] do_unlinkat+0x2e3/0xe50 [ 189.317529][ T5781] __x64_sys_unlink+0x71/0xb0 [ 189.322325][ T5781] x64_sys_call+0x29de/0x3db0 [ 189.327159][ T5781] do_syscall_64+0xd9/0x1b0 [ 189.331781][ T5781] ? irqentry_exit+0x16/0x60 [ 189.336517][ T5781] ? clear_bhb_loop+0x25/0x80 [ 189.341379][ T5781] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 189.347400][ T5781] RIP: 0033:0x7f0ca8945b59 [ 189.351948][ T5781] 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 [ 189.371717][ T5781] RSP: 002b:00007ffdc8948368 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [ 189.380342][ T5781] RAX: ffffffffffffffda RBX: 0000200000000040 RCX: 00007f0ca8945b59 [ 189.388433][ T5781] RDX: 00007f0ca8945b59 RSI: 000000000000275a RDI: 0000200000000000 [ 189.396545][ T5781] RBP: 0000200000000000 R08: 000055556ed7f4c0 R09: 000055556ed7f4c0 [ 189.404676][ T5781] R10: 0000000000006152 R11: 0000000000000246 R12: 00007ffdc8948390 [ 189.412752][ T5781] R13: 00007ffdc89485b8 R14: 431bde82d7b634db R15: 00007f0ca898e03b [ 189.420862][ T5781] [ 189.424348][ T5781] Kernel Offset: disabled [ 189.428761][ T5781] Rebooting in 86400 seconds..