Yes, it looks like a bug: we should initialize rc=0 at the beginning
of the function and then return it at the end. Otherwise the errors
are being hidden.
--
Best regards,
Pavel Shilovsky
ср, 21 авг. 2019 г. в 21:17, Steve French <smfrench@xxxxxxxxx>:
>
> Isn't this a different bug - we set rc to -EINVAL but then don't
> return rc, we return 0 which looks wrong.
>
> On Wed, Aug 21, 2019 at 11:11 PM zhengbin <zhengbin13@xxxxxxxxxx> wrote:
> >
> > Fixes gcc '-Wunused-but-set-variable' warning:
> >
> > fs/cifs/cifsacl.c: In function sid_to_id:
> > fs/cifs/cifsacl.c:347:6: warning: variable rc set but not used [-Wunused-but-set-variable]
> >
> > Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
> > Signed-off-by: zhengbin <zhengbin13@xxxxxxxxxx>
> > ---
> > fs/cifs/cifsacl.c | 3 ---
> > 1 file changed, 3 deletions(-)
> >
> > diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
> > index 1d377b7..2b34337 100644
> > --- a/fs/cifs/cifsacl.c
> > +++ b/fs/cifs/cifsacl.c
> > @@ -344,7 +344,6 @@ static int
> > sid_to_id(struct cifs_sb_info *cifs_sb, struct cifs_sid *psid,
> > struct cifs_fattr *fattr, uint sidtype)
> > {
> > - int rc;
> > struct key *sidkey;
> > char *sidstr;
> > const struct cred *saved_cred;
> > @@ -405,7 +404,6 @@ sid_to_id(struct cifs_sb_info *cifs_sb, struct cifs_sid *psid,
> > saved_cred = override_creds(root_cred);
> > sidkey = request_key(&cifs_idmap_key_type, sidstr, "");
> > if (IS_ERR(sidkey)) {
> > - rc = -EINVAL;
> > cifs_dbg(FYI, "%s: Can't map SID %s to a %cid\n",
> > __func__, sidstr, sidtype == SIDOWNER ? 'u' : 'g');
> > goto out_revert_creds;
> > @@ -418,7 +416,6 @@ sid_to_id(struct cifs_sb_info *cifs_sb, struct cifs_sid *psid,
> > */
> > BUILD_BUG_ON(sizeof(uid_t) != sizeof(gid_t));
> > if (sidkey->datalen != sizeof(uid_t)) {
> > - rc = -EIO;
> > cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%hu)\n",
> > __func__, sidkey->datalen);
> > key_invalidate(sidkey);
> > --
> > 2.7.4
> >
>
>
> --
> Thanks,
>
> Steve
