This is a note to let you know that I've just added the patch titled
ext4: correct inline offset when handling xattrs in inode body
to the 4.14-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-correct-inline-offset-when-handling-xattrs-in-inode-body.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6909cf5c4101214f4305a62d582a5b93c7e1eb9a Mon Sep 17 00:00:00 2001
From: Eric Whitney <enwlinux@xxxxxxxxx>
Date: Mon, 22 May 2023 14:15:20 -0400
Subject: ext4: correct inline offset when handling xattrs in inode body
From: Eric Whitney <enwlinux@xxxxxxxxx>
commit 6909cf5c4101214f4305a62d582a5b93c7e1eb9a upstream.
When run on a file system where the inline_data feature has been
enabled, xfstests generic/269, generic/270, and generic/476 cause ext4
to emit error messages indicating that inline directory entries are
corrupted. This occurs because the inline offset used to locate
inline directory entries in the inode body is not updated when an
xattr in that shared region is deleted and the region is shifted in
memory to recover the space it occupied. If the deleted xattr precedes
the system.data attribute, which points to the inline directory entries,
that attribute will be moved further up in the region. The inline
offset continues to point to whatever is located in system.data's former
location, with unfortunate effects when used to access directory entries
or (presumably) inline data in the inode body.
Cc: stable@xxxxxxxxxx
Signed-off-by: Eric Whitney <enwlinux@xxxxxxxxx>
Link: https://lore.kernel.org/r/20230522181520.1570360-1-enwlinux@xxxxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ext4/xattr.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1757,6 +1757,20 @@ static int ext4_xattr_set_entry(struct e
memmove(here, (void *)here + size,
(void *)last - (void *)here + sizeof(__u32));
memset(last, 0, size);
+
+ /*
+ * Update i_inline_off - moved ibody region might contain
+ * system.data attribute. Handling a failure here won't
+ * cause other complications for setting an xattr.
+ */
+ if (!is_block && ext4_has_inline_data(inode)) {
+ ret = ext4_find_inline_data_nolock(inode);
+ if (ret) {
+ ext4_warning_inode(inode,
+ "unable to update i_inline_off");
+ goto out;
+ }
+ }
} else if (s->not_found) {
/* Insert new name. */
size_t size = EXT4_XATTR_LEN(name_len);
Patches currently in stable-queue which might be from enwlinux@xxxxxxxxx are
queue-4.14/ext4-correct-inline-offset-when-handling-xattrs-in-inode-body.patch
