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ovl: port ovl_fill_super() to cred guard

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Use the scoped ovl cred guard.

Link: https://patch.msgid.link/20251117-work-ovl-cred-guard-v4-41-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 10:34:12 +01:00
parent fc95cda673
commit 217e78d1b7
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GPG Key ID: 91C61BC06578DCA2
1 changed files with 8 additions and 14 deletions
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22
fs/overlayfs/super.c
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@ -1540,8 +1540,6 @@ static int ovl_fill_super_creds(struct fs_context *fc, struct super_block *sb)
int ovl_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct ovl_fs *ofs = sb->s_fs_info;
const struct cred *old_cred = NULL;
struct cred *cred;
int err;
err = -EIO;
@ -1550,19 +1548,15 @@ int ovl_fill_super(struct super_block *sb, struct fs_context *fc)
ovl_set_d_op(sb);
err = -ENOMEM;
if (!ofs->creator_cred)
ofs->creator_cred = cred = prepare_creds();
else
cred = (struct cred *)ofs->creator_cred;
if (!cred)
goto out_err;
if (!ofs->creator_cred) {
err = -ENOMEM;
ofs->creator_cred = prepare_creds();
if (!ofs->creator_cred)
goto out_err;
}
old_cred = ovl_override_creds(sb);
err = ovl_fill_super_creds(fc, sb);
ovl_revert_creds(old_cred);
with_ovl_creds(sb)
err = ovl_fill_super_creds(fc, sb);
out_err:
if (err) {