ext4: properly align shifted xattrs when expanding inodes
We did not count with the padding of xattr value when computing desired
shift of xattrs in the inode when expanding i_extra_isize. As a result
we could create unaligned start of inline xattrs. Account for alignment
properly.
CC: stable@vger.kernel.org # 4.4.x-
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index b18b1ff..c893f00 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1522,7 +1522,7 @@
if (entry_size + EXT4_XATTR_SIZE(size) >= isize_diff)
shift_bytes = isize_diff;
else
- shift_bytes = entry_size + size;
+ shift_bytes = entry_size + EXT4_XATTR_SIZE(size);
/* Adjust the offsets and shift the remaining entries ahead */
ext4_xattr_shift_entries(entry, -shift_bytes,
(void *)raw_inode + EXT4_GOOD_OLD_INODE_SIZE +