[LTP] [PATCH] kernel/syscall/setrlimit05.c: use a legal bad address for mips

[Xiao Yang <yangx.jy@cn.fujitsu.com>]

Hi Hongzhi,

Do you try to build CONFIG_SYSCTL_SYSCALL and run sysctl04 on mips32?
It seems that (void *) -1 is used in sysctl04.c as well.  Perhaps, you 
can fix
the issue together if sysctl04 gets the same error on mips32. :-)

Best Regards,
Xiao Yang
On 2018/11/05 15:30, Hongzhi.Song wrote:
> This testcase fails on mips32. The process is killed by SIGBUS which
> doesn't return EFAULT as expect.
>
> This is because:
> ((void *)-1) is not a legal bad address which causes the process
> killed by SIGBUG on mips.
>
> 'tst_get_bad_addr()' returns an address that should work on mips
> and other arches.
>
> Signed-off-by: Hongzhi.Song<hongzhi.song@windriver.com>
> ---
>   testcases/kernel/syscalls/setrlimit/setrlimit05.c | 6 +++++-
>   1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/testcases/kernel/syscalls/setrlimit/setrlimit05.c b/testcases/kernel/syscalls/setrlimit/setrlimit05.c
> index e716722..57b0b82 100644
> --- a/testcases/kernel/syscalls/setrlimit/setrlimit05.c
> +++ b/testcases/kernel/syscalls/setrlimit/setrlimit05.c
> @@ -31,9 +31,13 @@ static void verify_setrlimit(void)
>   	int status;
>   	pid_t pid;
>
> +    void *bad_addr;
> +
> +    bad_addr = tst_get_bad_addr(NULL);
> +
>   	pid = SAFE_FORK();
>   	if (!pid) {
> -		TEST(setrlimit(RLIMIT_NOFILE, (void *) -1));
> +		TEST(setrlimit(RLIMIT_NOFILE,(struct rlimit *)bad_addr));
>   		if (TST_RET != -1) {
>   			tst_res(TFAIL, "setrlimit()  succeeded unexpectedly");
>   			exit(0);