// https://syzkaller.appspot.com/bug?id=6dcd14a729df98f989c7b76d254226ae67084efd // 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); } } static void test(); void loop() { while (1) { test(); } } long r[1]; void test() { memset(r, -1, sizeof(r)); memcpy((void*)0x20000000, "/dev/sg#", 9); r[0] = syz_open_dev(0x20000000, 0, 2); *(uint64_t*)0x20000080 = 0; *(uint64_t*)0x20000088 = 0x2710; *(uint16_t*)0x20000090 = 0; *(uint16_t*)0x20000092 = 0; *(uint32_t*)0x20000094 = 0; *(uint64_t*)0x20000098 = 0x77359400; *(uint64_t*)0x200000a0 = 0; *(uint16_t*)0x200000a8 = 0; *(uint16_t*)0x200000aa = 0; *(uint32_t*)0x200000ac = 0; syscall(__NR_write, r[0], 0x20000080, 0x30); *(uint64_t*)0x20ef0fe0 = 0x207d7000; *(uint64_t*)0x20ef0fe8 = 0x20; syscall(__NR_readv, r[0], 0x20ef0fe0, 1); } int main() { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); for (;;) { loop(); } }