This is a note to let you know that I've just added the patch titled
fs: Fix error checking for d_hash_and_lookup()
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:
fs-fix-error-checking-for-d_hash_and_lookup.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.
commit 0f31dbce55895450d369dcdfabbcce82e08e0328
Author: Wang Ming <machel@xxxxxxxx>
Date: Thu Jul 13 20:05:42 2023 +0800
fs: Fix error checking for d_hash_and_lookup()
[ Upstream commit 0d5a4f8f775ff990142cdc810a84eae078589d27 ]
The d_hash_and_lookup() function returns error pointers or NULL.
Most incorrect error checks were fixed, but the one in int path_pts()
was forgotten.
Fixes: eedf265aa003 ("devpts: Make each mount of devpts an independent filesystem.")
Signed-off-by: Wang Ming <machel@xxxxxxxx>
Message-Id: <20230713120555.7025-1-machel@xxxxxxxx>
Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/namei.c b/fs/namei.c
index 885b0e93ee966..ea2785103376e 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2836,7 +2836,7 @@ int path_pts(struct path *path)
dput(path->dentry);
path->dentry = parent;
child = d_hash_and_lookup(parent, &this);
- if (!child)
+ if (IS_ERR_OR_NULL(child))
return -ENOENT;
path->dentry = child;
