// 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); } } uint64_t r[1] = {0xffffffffffffffff}; void loop() { long res; memcpy((void*)0x20001000, "/dev/sg#", 9); res = syz_open_dev(0x20001000, 0, 2); if (res != -1) r[0] = res; *(uint64_t*)0x20001fdc = 0; *(uint64_t*)0x20001fe4 = 0; *(uint16_t*)0x20001fec = 0; *(uint16_t*)0x20001fee = 0; *(uint32_t*)0x20001ff0 = 0; *(uint64_t*)0x20001ff4 = 0; *(uint64_t*)0x20001ffc = 0; *(uint16_t*)0x20002004 = 0; *(uint16_t*)0x20002006 = 0; *(uint32_t*)0x20002008 = 0; syscall(__NR_write, r[0], 0x20001fdc, 0x30); *(uint64_t*)0x20000400 = 0x20000000; *(uint64_t*)0x20000408 = 0x85; *(uint64_t*)0x20000410 = 0x200000c0; *(uint64_t*)0x20000418 = 0x98; *(uint64_t*)0x20000420 = 0x20000180; *(uint64_t*)0x20000428 = 0xce; *(uint64_t*)0x20000430 = 0x20000280; *(uint64_t*)0x20000438 = 0x51; *(uint64_t*)0x20000440 = 0x20000300; *(uint64_t*)0x20000448 = 0xfb; syscall(__NR_readv, r[0], 0x20000400, 5); } int main() { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); loop(); return 0; }