Eric Sandeen wrote:
> The do_split() function for htree dir blocks is intended to split a
> leaf block to make room for a new entry. It sorts the entries in the
> original block by hash value, then moves the last half of the entries to
> the new block - without accounting for how much space this actually moves.
> (IOW, it moves half of the entry *count* not half of the entry *space*).
> If by chance we have both large & small entries, and we move only the
> smallest entries, and we have a large new entry to insert, we may not have
> created enough space for it.
(btw, the upshot of this is that in add_dirent_to_buf(),
memcpy(de->name, name, namelen) will overshoot the buffer and actually
corrupt memory.)
:(
-Eric
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
