Re: netlink: GPF in sock_sndtimeo

On Fri, Dec 9, 2016 at 12:48 PM, Richard Guy Briggs [off-list ref] wrote:

On 2016-12-09 11:49, Dmitry Vyukov wrote:

quoted

On Fri, Dec 9, 2016 at 7:02 AM, Richard Guy Briggs [off-list ref] wrote:

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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 :)

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--
Richard Guy Briggs [off-list ref]
Kernel Security Engineering, Base Operating Systems, Red Hat
Remote, Ottawa, Canada
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