Re: [PATCH 3/5] ext4: Extent overlap bugfix

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, May 03, 2007 at 09:30:02PM -0700, Andrew Morton wrote:
> On Thu, 26 Apr 2007 23:41:01 +0530 "Amit K. Arora" <[email protected]> wrote:
> 
> > +unsigned int ext4_ext_check_overlap(struct inode *inode,
> > +					struct ext4_extent *newext,
> > +					struct ext4_ext_path *path)
> > +{
> > +	unsigned long b1, b2;
> > +	unsigned int depth, len1;
> > +
> > +	b1 = le32_to_cpu(newext->ee_block);
> > +	len1 = le16_to_cpu(newext->ee_len);
> > +	depth = ext_depth(inode);
> > +	if (!path[depth].p_ext)
> > +		goto out;
> > +	b2 = le32_to_cpu(path[depth].p_ext->ee_block);
> > +
> > +	/* get the next allocated block if the extent in the path
> > +	 * is before the requested block(s) */
> > +	if (b2 < b1) {
> > +		b2 = ext4_ext_next_allocated_block(path);
> > +		if (b2 == EXT_MAX_BLOCK)
> > +			goto out;
> > +	}
> > +
> > +	if (b1 + len1 > b2) {
> 
> Are we sure that b1+len cannot wrap through zero here?

No. Will add a check here for this. Thanks!
 
> > +		newext->ee_len = cpu_to_le16(b2 - b1);
> > +		return 1;
> > +	}


--
Regards,
Amit Arora
-
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]
  Powered by Linux