ext4: Fix big-endian problem in __ext4_check_blockref()
Commit fe2c8191 introduced a regression on big-endian system, because
the checks to make sure block references in non-extent inodes are
valid failed to use le32_to_cpu().
Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Thiemo Nagel <thiemo.nagel@ph.tum.de>
Tested-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index a2e7952..c6bd6ce 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -372,16 +372,16 @@
}
static int __ext4_check_blockref(const char *function, struct inode *inode,
- unsigned int *p, unsigned int max) {
+ __le32 *p, unsigned int max) {
unsigned int maxblocks = ext4_blocks_count(EXT4_SB(inode->i_sb)->s_es);
- unsigned int *bref = p;
+ __le32 *bref = p;
while (bref < p+max) {
- if (unlikely(*bref >= maxblocks)) {
+ if (unlikely(le32_to_cpu(*bref) >= maxblocks)) {
ext4_error(inode->i_sb, function,
"block reference %u >= max (%u) "
"in inode #%lu, offset=%d",
- *bref, maxblocks,
+ le32_to_cpu(*bref), maxblocks,
inode->i_ino, (int)(bref-p));
return -EIO;
}