linux-kernel - Re: RE: [RFC] tools/nolibc: replace duplicated -ENOSYS return with single -ENOSYS return

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Message-ID: <6f93ea82-f157-e921-2028-5b4fae4ad341@gnuweeb.org>
Date:   Wed, 30 Aug 2023 21:40:37 +0700
From:   Ammar Faizi <ammarfaizi2@...weeb.org>
To:     David Laight <David.Laight@...LAB.COM>,
        Zhangjin Wu <falcon@...ylab.org>, Willy Tarreau <w@....eu>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Thomas Weißschuh <thomas@...ch.de>,
        Yuan Tan <tanyuan@...ylab.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Kselftest Mailing List 
        <linux-kselftest@...r.kernel.org>
Subject: Re: RE: [RFC] tools/nolibc: replace duplicated -ENOSYS return with
 single -ENOSYS return

On 8/28/23 4:51 AM, David Laight wrote:
> I just found a(nother) clang bug:
> 	int f(void) { return "a"[2]; }
> compiles to just a 'return'.

I don't think that's a bug. It's undefined behavior due to an
out-of-bound read. What do you expect it to return?

-- 
Ammar Faizi