linux-kernel - Re: netlink: GPF in sock

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Date:   Fri, 9 Dec 2016 06:48:47 -0500
From:   Richard Guy Briggs <rgb@...hat.com>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: netlink: GPF in sock_sndtimeo

On 2016-12-09 11:49, Dmitry Vyukov wrote:
> On Fri, Dec 9, 2016 at 7:02 AM, Richard Guy Briggs <rgb@...hat.com> wrote:
> > On 2016-11-29 23:52, Richard Guy Briggs wrote:
> > I tried a quick compile attempt on the test case (I assume it is a
> > socket fuzzer) and get the following compile error:
> > cc -g -O0 -Wall -D_GNU_SOURCE -o socket_fuzz socket_fuzz.c
> > socket_fuzz.c:16:1: warning: "_GNU_SOURCE" redefined
> > <command-line>: warning: this is the location of the previous definition
> > socket_fuzz.c: In function ‘segv_handler’:
> > socket_fuzz.c:89: warning: implicit declaration of function ‘__atomic_load_n’
> > socket_fuzz.c:89: error: ‘__ATOMIC_RELAXED’ undeclared (first use in this function)
> > socket_fuzz.c:89: error: (Each undeclared identifier is reported only once
> > socket_fuzz.c:89: error: for each function it appears in.)
> > socket_fuzz.c: In function ‘loop’:
> > socket_fuzz.c:280: warning: unused variable ‘errno0’
> > socket_fuzz.c: In function ‘test’:
> > socket_fuzz.c:303: warning: implicit declaration of function ‘__atomic_fetch_add’
> > socket_fuzz.c:303: error: ‘__ATOMIC_SEQ_CST’ undeclared (first use in this function)
> > socket_fuzz.c:303: warning: implicit declaration of function ‘__atomic_fetch_sub’
> 
> -std=gnu99 should help
> ignore warnings

I got a little further, left with "__ATOMIC_RELAXED undeclared", "__ATOMIC_SEQ_CST
undeclared" under gcc 4.4.7-16.

gcc 4.8.2-15 leaves me with "undefined reference to `clock_gettime'"

What compiler version do you recommend?

> >> - RGB
> >
> > - RGB

- RGB

--
Richard Guy Briggs <rgb@...hat.com>
Kernel Security Engineering, Base Operating Systems, Red Hat
Remote, Ottawa, Canada
Voice: +1.647.777.2635, Internal: (81) 32635