./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor444745872 <...> Warning: Permanently added '10.128.1.42' (ED25519) to the list of known hosts. execve("./syz-executor444745872", ["./syz-executor444745872"], 0x7ffd21eb33b0 /* 10 vars */) = 0 brk(NULL) = 0x5555686d5000 brk(0x5555686d5d00) = 0x5555686d5d00 arch_prctl(ARCH_SET_FS, 0x5555686d5380) = 0 set_tid_address(0x5555686d5650) = 5790 set_robust_list(0x5555686d5660, 24) = 0 rseq(0x5555686d5ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor444745872", 4096) = 27 getrandom("\xbb\x1c\x5e\xb1\xb5\xff\xa7\x62", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555686d5d00 brk(0x5555686f6d00) = 0x5555686f6d00 brk(0x5555686f7000) = 0x5555686f7000 mprotect(0x7f87c50c3000, 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./strace-static-x86_64: Process 5791 attached , child_tidptr=0x5555686d5650) = 5791 [pid 5791] set_robust_list(0x5555686d5660, 24) = 0 [pid 5791] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5791] setpgid(0, 0) = 0 [pid 5791] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5791] write(3, "1000", 4executing program ) = 4 [pid 5791] close(3) = 0 [pid 5791] write(1, "executing program\n", 18) = 18 [pid 5791] prlimit64(0, RLIMIT_RTPRIO, {rlim_cur=9, rlim_max=16777355}, NULL) = 0 [pid 5791] sched_setscheduler(0, SCHED_FIFO, NULL) = -1 EINVAL (Invalid argument) [pid 5791] memfd_create("syzkaller", 0) = 3 [pid 5791] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f87bcc00000 [pid 5791] 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 5791] munmap(0x7f87bcc00000, 138412032) = 0 [pid 5791] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5791] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5791] close(3) = 0 [pid 5791] close(4) = 0 [pid 5791] mkdir("./bus", 0777) = 0 [ 202.971626][ T5791] loop0: detected capacity change from 0 to 32768 [pid 5791] mount("/dev/loop0", "./bus", "jfs", MS_NOSUID|MS_NOEXEC, "") = 0 [pid 5791] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5791] chdir("./bus") = 0 [pid 5791] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5791] openat(AT_FDCWD, "hugetlb.2MB.usage_in_bytes", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 4 [ 203.071220][ T5791] ERROR: (device loop0): dtSearch: stack overrun! [ 203.071220][ T5791] [ 203.081366][ T5791] ERROR: (device loop0): remounting filesystem as read-only [ 203.089176][ T5791] btstack dump: [ 203.092877][ T5791] bn = 0, index = 0 [ 203.096872][ T5791] bn = 0, index = 0 [ 203.100974][ T5791] bn = 0, index = 0 [ 203.105109][ T5791] bn = 0, index = 0 [ 203.109264][ T5791] bn = 0, index = 0 [ 203.113260][ T5791] bn = 0, index = 0 [ 203.117372][ T5791] bn = 0, index = 0 [ 203.121479][ T5791] ===================================================== [ 203.128792][ T5791] BUG: KMSAN: uninit-value in BT_STACK_DUMP+0x5e5/0x600 [ 203.136052][ T5791] BT_STACK_DUMP+0x5e5/0x600 [ 203.140970][ T5791] dtSearch+0x393f/0x3d30 [ 203.145514][ T5791] jfs_lookup+0x179/0x590 [ 203.150172][ T5791] lookup_one_qstr_excl_raw+0x204/0x5b0 [ 203.155975][ T5791] do_unlinkat+0x2e3/0xe50 [ 203.160659][ T5791] __x64_sys_unlink+0x71/0xb0 [ 203.165529][ T5791] x64_sys_call+0x29de/0x3db0 [ 203.170476][ T5791] do_syscall_64+0xd9/0x1b0 [ 203.175217][ T5791] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 203.181382][ T5791] [ 203.183908][ T5791] Local variable nd created at: [ 203.189063][ T5791] __filename_parentat+0x4c/0x990 [ 203.194329][ T5791] do_unlinkat+0xe3/0xe50 [ 203.198925][ T5791] [ 203.201403][ T5791] CPU: 1 UID: 0 PID: 5791 Comm: syz-executor444 Not tainted 6.15.0-rc3-syzkaller-00094-g02ddfb981de8 #0 PREEMPT(undef) [ 203.214365][ T5791] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 203.224733][ T5791] ===================================================== [ 203.232004][ T5791] Disabling lock debugging due to kernel taint [ 203.238587][ T5791] Kernel panic - not syncing: kmsan.panic set ... [ 203.245176][ T5791] CPU: 1 UID: 0 PID: 5791 Comm: syz-executor444 Tainted: G B 6.15.0-rc3-syzkaller-00094-g02ddfb981de8 #0 PREEMPT(undef) [ 203.259562][ T5791] Tainted: [B]=BAD_PAGE [ 203.263849][ T5791] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 203.274331][ T5791] Call Trace: [ 203.277706][ T5791] [ 203.280722][ T5791] __dump_stack+0x26/0x30 [ 203.285243][ T5791] dump_stack_lvl+0x53/0x270 [ 203.290039][ T5791] ? kmsan_get_shadow_origin_ptr+0x4a/0xb0 [ 203.296105][ T5791] dump_stack+0x1e/0x25 [ 203.300495][ T5791] panic+0x4bd/0xd50 [ 203.304595][ T5791] kmsan_report+0x29d/0x2a0 [ 203.309265][ T5791] ? kmsan_get_metadata+0x105/0x1b0 [ 203.314629][ T5791] ? kmsan_internal_set_shadow_origin+0x79/0x110 [ 203.321251][ T5791] ? __msan_warning+0x96/0x120 [ 203.326174][ T5791] ? BT_STACK_DUMP+0x5e5/0x600 [ 203.331312][ T5791] ? dtSearch+0x393f/0x3d30 [ 203.336045][ T5791] ? jfs_lookup+0x179/0x590 [ 203.340762][ T5791] ? lookup_one_qstr_excl_raw+0x204/0x5b0 [ 203.346682][ T5791] ? do_unlinkat+0x2e3/0xe50 [ 203.351507][ T5791] ? __x64_sys_unlink+0x71/0xb0 [ 203.356617][ T5791] ? x64_sys_call+0x29de/0x3db0 [ 203.361652][ T5791] ? do_syscall_64+0xd9/0x1b0 [ 203.366604][ T5791] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 203.372914][ T5791] ? vprintk_emit+0xab3/0xcd0 [ 203.377890][ T5791] ? vprintk_default+0x3f/0x50 [ 203.382888][ T5791] ? vprintk+0x36/0x50 [ 203.387121][ T5791] ? _printk+0x17e/0x1b0 [ 203.391656][ T5791] ? kmsan_get_metadata+0x105/0x1b0 [ 203.397025][ T5791] __msan_warning+0x96/0x120 [ 203.401813][ T5791] BT_STACK_DUMP+0x5e5/0x600 [ 203.406647][ T5791] dtSearch+0x393f/0x3d30 [ 203.411236][ T5791] jfs_lookup+0x179/0x590 [ 203.415762][ T5791] ? kmsan_internal_set_shadow_origin+0x79/0x110 [ 203.422274][ T5791] ? pages_to_scan_store+0x80/0x160 [ 203.427746][ T5791] ? _raw_spin_unlock+0x30/0x50 [ 203.432832][ T5791] ? kmsan_get_shadow_origin_ptr+0x4a/0xb0 [ 203.438832][ T5791] ? __pfx_jfs_lookup+0x10/0x10 [ 203.443853][ T5791] lookup_one_qstr_excl_raw+0x204/0x5b0 [ 203.449618][ T5791] do_unlinkat+0x2e3/0xe50 [ 203.454324][ T5791] __x64_sys_unlink+0x71/0xb0 [ 203.459194][ T5791] x64_sys_call+0x29de/0x3db0 [ 203.464260][ T5791] do_syscall_64+0xd9/0x1b0 [ 203.469057][ T5791] ? irqentry_exit+0x16/0x60 [ 203.473833][ T5791] ? clear_bhb_loop+0x25/0x80 [ 203.478930][ T5791] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 203.485120][ T5791] RIP: 0033:0x7f87c504ab19 [ 203.489694][ T5791] 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 [ 203.509651][ T5791] RSP: 002b:00007fffa37da438 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [ 203.518269][ T5791] RAX: ffffffffffffffda RBX: 0000200000000040 RCX: 00007f87c504ab19 [ 203.526421][ T5791] RDX: 00007f87c504ab19 RSI: 000000000000275a RDI: 0000200000000000 [ 203.534519][ T5791] RBP: 00007f87c50c35f0 R08: 00005555686d64c0 R09: 00005555686d64c0 [ 203.543068][ T5791] R10: 0000000000006152 R11: 0000000000000246 R12: 00007fffa37da460 [ 203.551174][ T5791] R13: 00007fffa37da688 R14: 431bde82d7b634db R15: 00007f87c509303b [ 203.559387][ T5791] [ 203.562884][ T5791] Kernel Offset: disabled [ 203.567590][ T5791] Rebooting in 86400 seconds..