// https://syzkaller.appspot.com/bug?id=ea8291a5b20aa48941a0cacabe6688024b237728 // 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_dev(uintptr_t a0, uintptr_t a1, uintptr_t a2) { if (a0 == 0xc || a0 == 0xb) { char buf[128]; sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1, (uint8_t)a2); return open(buf, O_RDWR, 0); } else { char buf[1024]; char* hash; strncpy(buf, (char*)a0, sizeof(buf)); buf[sizeof(buf) - 1] = 0; while ((hash = strchr(buf, '#'))) { *hash = '0' + (char)(a1 % 10); a1 /= 10; } return open(buf, a2, 0); } } uint64_t r[1] = {0xffffffffffffffff}; void loop() { long res; memcpy((void*)0x20000000, "/dev/sg#", 9); res = syz_open_dev(0x20000000, 0, 0); if (res != -1) r[0] = res; *(uint64_t*)0x20000040 = 9; syscall(__NR_ioctl, r[0], 0x5452, 0x20000040); *(uint64_t*)0x200023c0 = 0x20000080; *(uint64_t*)0x200023c8 = 0x1000; *(uint64_t*)0x200023d0 = 0x20001080; *(uint64_t*)0x200023d8 = 0xd9; *(uint64_t*)0x200023e0 = 0x20001180; *(uint64_t*)0x200023e8 = 0x5d; *(uint64_t*)0x200023f0 = 0x20001200; *(uint64_t*)0x200023f8 = 0x5f; *(uint64_t*)0x20002400 = 0x20001280; *(uint64_t*)0x20002408 = 0x1000; *(uint64_t*)0x20002410 = 0x20002280; *(uint64_t*)0x20002418 = 0; *(uint64_t*)0x20002420 = 0x200022c0; *(uint64_t*)0x20002428 = 0xf6; syscall(__NR_readv, r[0], 0x200023c0, 7); } int main() { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); loop(); return 0; }