‘snprintf’ output between 9 and 291 bytes into a destination of size 255

This means that the function `snprintf` is being used to write a string to a buffer, and the desired length of the string is between 9 and 291 bytes. However, the destination buffer that has been allocated is only 255 bytes in size. This can result in a buffer overflow, which can cause memory corruption and undefined behavior.

To fix this issue, you can either increase the size of the destination buffer to at least 291 bytes, or you can modify the code to ensure that the output string is no longer than 255 bytes. One way to do this is to use the return value of `snprintf` to check the number of characters that would have been written to the buffer, and truncate the string if necessary. For example:

char buffer[255];
int length = snprintf(buffer, sizeof(buffer), "some string with length between 9 and 291 bytes");
if (length > sizeof(buffer) - 1) {
    length = sizeof(buffer) - 1;
}
buffer[length] = '\0'; // make sure the string is null-terminated