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Commit 9890b9cb authored by Konstantin Khlebnikov's avatar Konstantin Khlebnikov Committed by Greg Kroah-Hartman
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ext4: keep existing extra fields when inode expands 



commit 887a9730614727c4fff7cb756711b190593fc1df upstream.

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

Fixes: 6dd4ee7c # v2.6.23
Signed-off-by: default avatarKonstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9850844e

fs/ext4/inode.c

+3 −2
Original line number Diff line number Diff line
@@ -5441,8 +5441,9 @@ 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;

	}