This is a note to let you know that I've just added the patch titled
ext4: set lockdep subclass for the ea_inode in ext4_xattr_inode_cache_find()
to the 5.15-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-set-lockdep-subclass-for-the-ea_inode-in-ext4_xattr_inode_cache_find.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b928dfdcb27d8fa59917b794cfba53052a2f050f Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@xxxxxxx>
Date: Tue, 23 May 2023 23:49:49 -0400
Subject: ext4: set lockdep subclass for the ea_inode in ext4_xattr_inode_cache_find()
From: Theodore Ts'o <tytso@xxxxxxx>
commit b928dfdcb27d8fa59917b794cfba53052a2f050f upstream.
If the ea_inode has been pushed out of the inode cache while there is
still a reference in the mb_cache, the lockdep subclass will not be
set on the inode, which can lead to some lockdep false positives.
Fixes: 33d201e0277b ("ext4: fix lockdep warning about recursive inode locking")
Cc: stable@xxxxxxxxxx
Reported-by: syzbot+d4b971e744b1f5439336@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Link: https://lore.kernel.org/r/20230524034951.779531-3-tytso@xxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ext4/xattr.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1490,6 +1490,7 @@ ext4_xattr_inode_cache_find(struct inode
EXT4_IGET_EA_INODE);
if (IS_ERR(ea_inode))
goto next_entry;
+ ext4_xattr_inode_set_class(ea_inode);
if (i_size_read(ea_inode) == value_len &&
!ext4_xattr_inode_read(ea_inode, ea_data, value_len) &&
!ext4_xattr_inode_verify_hashes(ea_inode, NULL, ea_data,
Patches currently in stable-queue which might be from tytso@xxxxxxx are
queue-5.15/ext4-add-ea_inode-checking-to-ext4_iget.patch
queue-5.15/ext4-set-lockdep-subclass-for-the-ea_inode-in-ext4_xattr_inode_cache_find.patch
queue-5.15/ext4-disallow-ea_inodes-with-extended-attributes.patch
queue-5.15/ext4-add-lockdep-annotations-for-i_data_sem-for-ea_inode-s.patch
