Re: netlink: GPF in sock_sndtimeo

[Richard Guy Briggs]

On 2016-12-09 12:53, Dmitry Vyukov wrote:
> 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

Ok, that helped.  Thanks!

> > 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 :)

  These are under RHEL6...  so there are updates to them, but yeah, they are old.

> >> >> - 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

- 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