Hi, I figured out what's wrong with the gunzip store.
The compressed file is 566 bytes. Now, zread in gunzip() in gunzip.c does try to read in chunks of 256kb (IN_BUFFERING). This means, store_read is called with amount being 256kb. Because the size of the first run is smaller than that, store_read tries to read from multiple stores. Because in this case store_next_run is called, and store_next_run wraps around, this will succeed. Now, store_read returns 256kb, and that wretches things in zread badly. in_buf_addr will now be larger than the size of the store, and, yo and behold, the calculation of maxaddr will underflow, leading to a maxaddr of around 2^32 minus something (something being 256kb - 566 or so). The next read will read past the end of the store and trigger the EIO. Again, finding the right place to fix that is bit of a problem. Only reading up to maxread defeats the purpose of in_buffering. Maybe store_read should not wrap around (I am not sure why it does?). Thanks, Marcus -- `Rhubarb is no Egyptian god.' Debian http://www.debian.org [EMAIL PROTECTED] Marcus Brinkmann GNU http://www.gnu.org [EMAIL PROTECTED] [EMAIL PROTECTED] http://www.marcus-brinkmann.de _______________________________________________ Bug-hurd mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-hurd
