Commit 816cd71b authored May 05, 2016 by Nicolai Stange Committed by Theodore Ts'o May 05, 2016

ext4: remove unmeetable inconsisteny check from ext4_find_extent()



ext4_find_extent(), stripped down to the parts relevant to this patch,
reads as

  ppos = 0;
  i = depth;
  while (i) {
    --i;
    ++ppos;
    if (unlikely(ppos > depth)) {
      ...
      ret = -EFSCORRUPTED;
      goto err;
    }
  }

Due to the loop's bounds, the condition ppos > depth can never be met.

Remove this dead code.

Signed-off-by: Nicolai Stange <nicstange@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

parent 466c3fb6

fs/ext4/extents.c

+0 −7

Original line number	Diff line number	Diff line
		@@ -912,13 +912,6 @@ ext4_find_extent(struct inode *inode, ext4_lblk_t block,

		eh = ext_block_hdr(bh);
		ppos++;
		if (unlikely(ppos > depth)) {
		put_bh(bh);
		EXT4_ERROR_INODE(inode,
		"ppos %d > depth %d", ppos, depth);
		ret = -EFSCORRUPTED;
		goto err;
		}
		path[ppos].p_bh = bh;
		path[ppos].p_hdr = eh;
		}