From: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx> commit 887a9730614727c4fff7cb756711b190593fc1df upstream. ext4_expand_extra_isize() should clear only space between old and new size. Fixes: 6dd4ee7cab7e # v2.6.23 Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx> Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> Signed-off-by: Willy Tarreau <w@xxxxxx> --- fs/ext4/inode.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 1095d77..1094017 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5045,8 +5045,9 @@ 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; } -- 2.8.0.rc2.1.gbe9624a