From: Wang Ming machel@vivo.com

mainline inclusion from mainline-v6.6-rc1 commit 0d5a4f8f775ff990142cdc810a84eae078589d27 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8LNLY?from=project-issue

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

--------------------------------

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@vivo.com Message-Id: 20230713120555.7025-1-machel@vivo.com Signed-off-by: Christian Brauner brauner@kernel.org Signed-off-by: Zizhi Wo wozizhi@huawei.com --- fs/namei.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/namei.c b/fs/namei.c index ff140e2943a0..3588e12d6130 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -2647,7 +2647,7 @@ 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;