// https://syzkaller.appspot.com/bug?id=3c1f47967b7cbd399d3ba3e65f297a29aa1c5f92 // 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 = 0; memcpy((void*)0x20005000, "/dev/sg#", 9); res = syz_open_dev(0x20005000, 0, 0x8002); if (res != -1) r[0] = res; syscall(__NR_write, r[0], 0x20eaffa7, 0); *(uint64_t*)0x201b6f90 = 0x20e43000; memcpy((void*)0x20e43000, "\xe5\x9b\xc0\x53\xdc\xe4\x04\x31\x7b\xb5\x1f\x59" "\x7e\xa6\xfe\xb2\x7c\x63\x71\x10\x0c\xa6\xf5\xc5" "\x3d\xed\x1c\x2f\x0f\xd1\xc9\x2c\x1f\x80\x82\xc2" "\x12\xf7\xfe\xad\xb3\xaf", 42); *(uint64_t*)0x201b6f98 = 0x2a; syscall(__NR_writev, r[0], 0x201b6f90, 1); *(uint64_t*)0x200001c0 = 0x20000000; *(uint64_t*)0x200001c8 = 0xb3; *(uint64_t*)0x200001d0 = 0x200000c0; *(uint64_t*)0x200001d8 = 0xe7; syscall(__NR_readv, r[0], 0x200001c0, 2); } int main() { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); loop(); return 0; }