Re: netlink: GPF in sock_sndtimeo

[Dmitry Vyukov]

On Fri, Dec 9, 2016 at 12:48 PM, Richard Guy Briggs <rgb@xxxxxxxxxx> wrote:
> On 2016-12-09 11:49, Dmitry Vyukov wrote:
>> On Fri, Dec 9, 2016 at 7:02 AM, Richard Guy Briggs <rgb@xxxxxxxxxx> 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 âsegv_handlerâ:
>> > socket_fuzz.c:89: warning: implicit declaration of function â__atomic_load_nâ
>> > socket_fuzz.c:89: error: â__ATOMIC_RELAXEDâ 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 âloopâ:
>> > socket_fuzz.c:280: warning: unused variable âerrno0â
>> > socket_fuzz.c: In function âtestâ:
>> > socket_fuzz.c:303: warning: implicit declaration of function â__atomic_fetch_addâ
>> > socket_fuzz.c:303: error: â__ATOMIC_SEQ_CSTâ undeclared (first use in this function)
>> > socket_fuzz.c:303: warning: implicit declaration of function â__atomic_fetch_subâ
>>
>> -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@xxxxxxxxxx>
> Kernel Security Engineering, Base Operating Systems, Red Hat
> Remote, Ottawa, Canada
> Voice: +1.647.777.2635, Internal: (81) 32635