// https://syzkaller.appspot.com/bug?id=84909969606053c6256d4b0541443dab936c198d // 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); } } long r[1]; void loop() { memset(r, -1, sizeof(r)); syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0); memcpy((void*)0x20159000, "/dev/loop#", 11); r[0] = syz_open_dev(0x20159000, 0, 0); *(uint32_t*)0x20872000 = 0; *(uint32_t*)0x20872004 = 0; *(uint32_t*)0x20872008 = 0; *(uint32_t*)0x2087200c = 0; *(uint32_t*)0x20872010 = 8; *(uint32_t*)0x20872014 = 0xf; *(uint32_t*)0x20872018 = 0; *(uint32_t*)0x2087201c = 0x14; memcpy((void*)0x20872020, "\x00\x00\x00\x3f\x01\x00\x00\x00\x01\x00\x1b\x08\xff\xff\x00\x00\x00" "\x65\x00\x00\x00\x01\x00\x00\x00\x7d\xb0\xe6\xf1\x0e\xfb\xe7\xaf\x01" "\xd8\xf6\xaa\x6b\xd5\x8d\x1c\x43\x47\x31\x00\xe8\x50\x26\xfd\xff\x40" "\xf9\xb5\x00\xd1\xb3\x33\x00\x00\x00\x00\x00\x01\xf3", 64); memcpy((void*)0x20872060, "\xcf\xa4\x00\x05\x00\x00\x00\xf7\xff\xff\x16\xff" "\x00\x00\x20\x00\x00\x00\x02\xff\xb8\x33\x22\xdd" "\x82\xab\x86\x7c\xe2\x00\x00\x06", 32); *(uint64_t*)0x20872080 = 0; *(uint64_t*)0x20872088 = 0; *(uint32_t*)0x20872090 = 0; syscall(__NR_ioctl, r[0], 0xc0481273, 0x20872000); } int main() { loop(); return 0; }