[LTP] [PATCH] syscalls/sendmmsg: add new test

[Cyril Hrubis <chrubis@suse.cz>]

Hi!
> > Signed-off-by: Steve Muckle <smuckle@google.com>
> Acked-by: Petr Vorel <pvorel@suse.cz>
> 
> > ---
> 
> > Changes since v3:
> >  - drop resending of messages on partially successful sendmmsg()
> >  - drop use of pthreads, do message creation and port management in
> >    setup/cleanup
> 
> The only thing left in v4 is duplicate LTP_CHECK_MMSGHDR call.
> + I'd use lapi/socket.h also in cve-2016-7117.c (as Cyril pointed out)
> in this commit (this change is simple enough).
> 
> So I'd be for merging v4 with diff below.

There is also leftover -pthread in CFLAGS in Makefile since we dropped
pthreads from the test. Other than that and the minor issues you have
pointed it looks good to me as well.

> Kind regards,
> Petr
> 
> diff --git configure.ac configure.ac
> index 5e4e7f1f9..f7d1afc40 100644
> --- configure.ac
> +++ configure.ac
> @@ -255,7 +255,6 @@ LTP_CHECK_TIME
>  LTP_CHECK_TIMERFD
>  test "x$with_tirpc" = xyes && LTP_CHECK_TIRPC
>  LTP_CHECK_TPACKET_V3
> -LTP_CHECK_MMSGHDR
>  LTP_CHECK_UNAME_DOMAINNAME
>  LTP_CHECK_XFS_QUOTACTL
>  LTP_CHECK_X_TABLES
> diff --git testcases/cve/cve-2016-7117.c testcases/cve/cve-2016-7117.c
> index f0f6c22f1..140839712 100644
> --- testcases/cve/cve-2016-7117.c
> +++ testcases/cve/cve-2016-7117.c
> @@ -30,6 +30,8 @@
>   * https://blog.lizzie.io/notes-about-cve-2016-7117.html
>   */
>  
> +#include "config.h"
> +
>  #include <sys/wait.h>
>  #include <sys/types.h>
>  #include <sys/socket.h>
> @@ -44,20 +46,12 @@
>  
>  /* The bug was present in the kernel before recvmmsg was exposed by glibc */
>  #include "lapi/syscalls.h"
> -
> -#include "config.h"
> +#include "lapi/socket.h"
>  
>  #define MSG "abcdefghijklmnop"
>  #define RECV_TIMEOUT 1
>  #define ATTEMPTS 0x1FFFFF
>  
> -#ifndef HAVE_STRUCT_MMSGHDR
> -struct mmsghdr {
> -	struct msghdr msg_hdr;
> -	unsigned int msg_len;
> -};
> -#endif
> -
>  static volatile int socket_fds[2];
>  static struct mmsghdr msghdrs[2] = {
>  	{

-- 
Cyril Hrubis
chrubis@suse.cz