提交 887a9730 编写于 作者: K Konstantin Khlebnikov 提交者: Theodore Ts'o

ext4: keep existing extra fields when inode expands

ext4_expand_extra_isize() should clear only space between old and new
size.

Fixes: 6dd4ee7c # v2.6.23
Cc: stable@vger.kernel.org
Signed-off-by: NKonstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
上级 9651e6b2
......@@ -5637,8 +5637,9 @@ static int ext4_expand_extra_isize(struct inode *inode,
/* No extended attributes present */
if (!ext4_test_inode_state(inode, EXT4_STATE_XATTR) ||
header->h_magic != cpu_to_le32(EXT4_XATTR_MAGIC)) {
memset((void *)raw_inode + EXT4_GOOD_OLD_INODE_SIZE, 0,
new_extra_isize);
memset((void *)raw_inode + EXT4_GOOD_OLD_INODE_SIZE +
EXT4_I(inode)->i_extra_isize, 0,
new_extra_isize - EXT4_I(inode)->i_extra_isize);
EXT4_I(inode)->i_extra_isize = new_extra_isize;
return 0;
}
......
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