This is a note to let you know that I've just added the patch titled ext4: keep existing extra fields when inode expands to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ext4-keep-existing-extra-fields-when-inode-expands.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 887a9730614727c4fff7cb756711b190593fc1df Mon Sep 17 00:00:00 2001 From: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx> Date: Sun, 21 May 2017 22:36:23 -0400 Subject: ext4: keep existing extra fields when inode expands 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 Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx> Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/ext4/inode.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5162,8 +5162,9 @@ static int ext4_expand_extra_isize(struc /* 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; } Patches currently in stable-queue which might be from khlebnikov@xxxxxxxxxxxxxx are queue-4.4/ext4-keep-existing-extra-fields-when-inode-expands.patch