On Fri, Jul 01, 2011 at 11:27:52PM +0800, Tao Ma wrote: > From: Tao Ma <boyu.mt@xxxxxxxxxx> > > In 0f0a25b, we adjust 'len' with s_first_data_block - start, but > it could underflow in case blocksize=1K, fstrim_range.len=512 and > fstrim_range.start = 0. In this case, when we run the code: > len -= first_data_blk - start; len will be underflow to -1ULL. > In the end, although we are safe that last_group check later will limit > the trim to the whole volume, but that isn't what the user really want. > > So this patch fix it. It also adds the check for 'start' like ext3 so that > we can break immediately if the start is invalid. > > Cc: Lukas Czerner <lczerner@xxxxxxxxxx> > Signed-off-by: Tao Ma <boyu.mt@xxxxxxxxxx> Added to the ext4 tree, thanks. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
