Re: netlink: GPF in sock_sndtimeo

From	Dmitry Vyukov <dvyukov@google.com>
Newsgroups	linux.kernel
Subject	Re: netlink: GPF in sock_sndtimeo
Date	2016-12-09 13:00 +0100
Message-ID	<sMs0h-2MT-1@gated-at.bofh.it> (permalink)
References	(1 earlier) <sIZQR-6vY-11@gated-at.bofh.it> <sJ59T-1k3-13@gated-at.bofh.it> <sMmxA-8aC-9@gated-at.bofh.it> <sMqUx-2aW-1@gated-at.bofh.it> <sMrQC-2JA-7@gated-at.bofh.it>
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On Fri, Dec 9, 2016 at 12:48 PM, Richard Guy Briggs <rgb@redhat.com> wrote:
> On 2016-12-09 11:49, Dmitry Vyukov wrote:
>> On Fri, Dec 9, 2016 at 7:02 AM, Richard Guy Briggs <rgb@redhat.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'"

add -lrt


> What compiler version do you recommend?

6.x sounds reasonable
4.4 branch is 7.5 years old, surprised that it does not disintegrate
into dust yet :)


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

Thread

Re: netlink: GPF in sock_sndtimeo Richard Guy Briggs <rgb@redhat.com> - 2016-11-29 18:00 +0100
  Re: netlink: GPF in sock_sndtimeo Cong Wang <xiyou.wangcong@gmail.com> - 2016-11-30 00:20 +0100
    Re: netlink: GPF in sock_sndtimeo Richard Guy Briggs <rgb@redhat.com> - 2016-11-30 06:00 +0100
      Re: netlink: GPF in sock_sndtimeo Richard Guy Briggs <rgb@redhat.com> - 2016-12-09 07:10 +0100
        Re: netlink: GPF in sock_sndtimeo Cong Wang <xiyou.wangcong@gmail.com> - 2016-12-09 08:00 +0100
          Re: netlink: GPF in sock_sndtimeo Richard Guy Briggs <rgb@redhat.com> - 2016-12-09 12:10 +0100
            Re: netlink: GPF in sock_sndtimeo Cong Wang <xiyou.wangcong@gmail.com> - 2016-12-10 05:20 +0100
              Re: netlink: GPF in sock_sndtimeo Cong Wang <xiyou.wangcong@gmail.com> - 2016-12-10 08:50 +0100
        Re: netlink: GPF in sock_sndtimeo Dmitry Vyukov <dvyukov@google.com> - 2016-12-09 11:50 +0100
          Re: netlink: GPF in sock_sndtimeo Richard Guy Briggs <rgb@redhat.com> - 2016-12-09 12:50 +0100
            Re: netlink: GPF in sock_sndtimeo Dmitry Vyukov <dvyukov@google.com> - 2016-12-09 13:00 +0100
              Re: netlink: GPF in sock_sndtimeo Richard Guy Briggs <rgb@redhat.com> - 2016-12-09 13:20 +0100

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