Re: staging: exfat: issue with FFS_MEDIAERR error return assignment

From: Valdis KlÄtnieks
Date: Tue Sep 10 2019 - 09:18:49 EST


On Tue, 10 Sep 2019 16:09:35 +0300, Dan Carpenter said:
> On Tue, Sep 10, 2019 at 01:58:35PM +0100, Colin Ian King wrote:
> > On 10/09/2019 13:44, Dan Carpenter wrote:
> > > On Fri, Aug 30, 2019 at 07:38:00PM +0100, Colin Ian King wrote:
> > >> Hi,
> > >>
> > >> Static analysis on exfat with Coverity has picked up an assignment of
> > >> FFS_MEDIAERR that gets over-written:
> > >>
> > >>
> > >> 1750 if (is_dir) {
> > >> 1751 if ((fid->dir.dir == p_fs->root_dir) &&
> > >> 1752 (fid->entry == -1)) {
> > >> 1753 if (p_fs->dev_ejected)
> > >
> > > Idealy we would have both a filename and a function name but this email
> > > doesn't have either so no one knows what code you are talking about. :P
> >
> > Oops, my bad.
> >
> > drivers/staging/exfat/exfat_super.c ffsWriteStat()
>
> Yes, your solution is correct.

Actually, you can skip the else, because we initialized 'ret' at the start of the function.

The *bigger* issue - what should 'ret' be if dev_ejected is *false*?

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