// https://syzkaller.appspot.com/bug?id=3df771d521c17c319d5ad08480f2a21f7b1e56b0 // autogenerated by syzkaller (http://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include static uintptr_t syz_open_procfs(uintptr_t a0, uintptr_t a1) { char buf[128]; memset(buf, 0, sizeof(buf)); if (a0 == 0) { snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1); } else if (a0 == (uintptr_t)-1) { snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1); } else { snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0, (char*)a1); } int fd = open(buf, O_RDWR); if (fd == -1) fd = open(buf, O_RDONLY); return fd; } uint64_t r[1] = {0xffffffffffffffff}; void loop() { long res = 0; memcpy((void*)0x20000080, "\x00\x00\x00\x00\x00", 5); res = syz_open_procfs(0, 0x20000080); if (res != -1) r[0] = res; syscall(__NR_lseek, r[0], 0, 2); syscall(__NR_getdents, r[0], 0x20001100, 0xbc); } int main() { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); loop(); return 0; }