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ovl: port ovl_lookup() to cred guard

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Use the scoped ovl cred guard.

Link: https://patch.msgid.link/20251117-work-ovl-cred-guard-v4-38-b31603935724@kernel.org
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2025-11-17 10:34:09 +01:00
parent 15da486ad3
commit 6b6ef7d16f
1 changed files with 2 additions and 5 deletions
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7
fs/overlayfs/namei.c
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@@ -1376,7 +1376,6 @@ static int ovl_lookup_layers(struct ovl_lookup_ctx *ctx, struct ovl_lookup_data
struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
unsigned int flags)
{
const struct cred *old_cred;
struct ovl_fs *ofs = OVL_FS(dentry->d_sb);
struct ovl_entry *poe = OVL_E(dentry->d_parent);
bool check_redirect = (ovl_redirect_follow(ofs) || ofs->numdatalayer);
@@ -1394,11 +1393,9 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
if (dentry->d_name.len > ofs->namelen)
return ERR_PTR(-ENAMETOOLONG);
old_cred = ovl_override_creds(dentry->d_sb);
with_ovl_creds(dentry->d_sb)
err = ovl_lookup_layers(&ctx, &d);
err = ovl_lookup_layers(&ctx, &d);
ovl_revert_creds(old_cred);
if (ctx.origin_path) {
dput(ctx.origin_path->dentry);
kfree(ctx.origin_path);