libext2fs: avoid pointer arithmetic on `void *`

The pointer operand to the binary `+` operator must be to a complete
object type.

Signed-off-by: Michael Forney <mforney@mforney.org>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/lib/ext2fs/csum.c b/lib/ext2fs/csum.c
index a717258..54b53a3 100644 (file)
--- a/lib/ext2fs/csum.c
+++ b/lib/ext2fs/csum.c
@@ -274,7 +274,7 @@ static errcode_t __get_dirent_tail(ext2_filsys fs,
                rec_len = translate(d->rec_len);
        }
 
-       if ((void *)d > ((void *)dirent + fs->blocksize))
+       if ((char *)d > ((char *)dirent + fs->blocksize))
                        return EXT2_ET_DIR_CORRUPTED;
        if (d != top)
                return EXT2_ET_DIR_NO_SPACE_FOR_CSUM;