From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Qian Cai <cai@lca.pw>, Hugh Dickins <hughd@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Matej Kupljen <matej.kupljen@gmail.com>,
Al Viro <viro@zeniv.linux.org.uk>,
Dan Carpenter <dan.carpenter@oracle.com>,
Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>
Subject: Re: [PATCH] tmpfs: fix uninitialized return value in shmem_link
Date: Mon, 25 Feb 2019 16:29:04 -0800 [thread overview]
Message-ID: <20190226002904.GE6474@magnolia> (raw)
In-Reply-To: <CAHk-=wggjLsi-1BmDHqWAJPzBvTD_-MQNo5qQ9WCuncnyWPROg@mail.gmail.com>
On Mon, Feb 25, 2019 at 04:07:12PM -0800, Linus Torvalds wrote:
> On Mon, Feb 25, 2019 at 4:03 PM Qian Cai <cai@lca.pw> wrote:
> > >
> > > Of course, that's just gcc. I have no idea what llvm ends up doing.
> >
> > Clang 7.0:
> >
> > # clang -O2 -S -Wall /tmp/test.c
> > /tmp/test.c:46:6: warning: variable 'ret' is used uninitialized whenever 'if'
> > condition is false [-Wsometimes-uninitialized]
>
> Ok, good.
>
> Do we have any clang builds in any of the zero-day robot
> infrastructure or something? Should we?
>
> And maybe this was how Dan noticed the problem in the first place? Or
> is it just because of his eagle-eyes?
He didn't say specifically how he found it, but I would guess he was
running smatch...?
--D
> Linus
next prev parent reply other threads:[~2019-02-26 0:29 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-21 22:21 [PATCH] tmpfs: fix uninitialized return value in shmem_link Darrick J. Wong
2019-02-21 23:05 ` Hugh Dickins
2019-02-23 6:35 ` Hugh Dickins
2019-02-25 19:53 ` Linus Torvalds
2019-02-25 20:34 ` Hugh Dickins
2019-02-25 22:34 ` Linus Torvalds
2019-02-25 23:58 ` Linus Torvalds
2019-02-26 0:03 ` Qian Cai
2019-02-26 0:07 ` Linus Torvalds
2019-02-26 0:29 ` Darrick J. Wong [this message]
2019-02-27 14:09 ` Qian Cai
2019-02-27 20:12 ` Qian Cai
2019-02-28 8:56 ` Nathan Chancellor
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