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ovl: port ovl_maybe_lookup_lowerdata() to cred guard

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Use the scoped ovl cred guard.

Link: https://patch.msgid.link/20251117-work-ovl-cred-guard-v4-23-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 10:33:54 +01:00
parent b1c47b3abc
commit cb3c8cbaed
1 changed files with 2 additions and 4 deletions
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6
fs/overlayfs/namei.c
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@@ -996,7 +996,6 @@ static int ovl_maybe_lookup_lowerdata(struct dentry *dentry)
struct inode *inode = d_inode(dentry);
const char *redirect = ovl_lowerdata_redirect(inode);
struct ovl_path datapath = {};
const struct cred *old_cred;
int err;
if (!redirect || ovl_dentry_lowerdata(dentry))
@@ -1014,9 +1013,8 @@ static int ovl_maybe_lookup_lowerdata(struct dentry *dentry)
if (ovl_dentry_lowerdata(dentry))
goto out;
old_cred = ovl_override_creds(dentry->d_sb);
err = ovl_lookup_data_layers(dentry, redirect, &datapath);
ovl_revert_creds(old_cred);
with_ovl_creds(dentry->d_sb)
err = ovl_lookup_data_layers(dentry, redirect, &datapath);
if (err)
goto out_err;