linux-kernel - Re: [V2,06/12] selftests, powerpc: Add test for system wide DSCR default

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 27 Mar 2015 23:01:36 +1100 (AEDT)
From:	Michael Ellerman <mpe@...erman.id.au>
To:	Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Cc:	mikey@...ling.org, anton@...ba.org
Subject: Re: [V2,06/12] selftests, powerpc: Add test for system wide DSCR default

On Tue, 2015-13-01 at 10:22:34 UTC, Anshuman Khandual wrote:
> This patch adds a test case for the system wide DSCR default
> value, which when changed through it's sysfs interface must
> be visible to all threads reading DSCR either through the
> privilege state SPR or the problem state SPR. The DSCR value
> change should be immediate as well.
 
...

> +
> +/* Default DSCR access */
> +unsigned long get_default_dscr(void)
> +{
> +	int fd = -1;
> +	char buf[16];
> +	unsigned long val;
> +
> +	if (fd == -1) {
> +		fd = open(DSCR_DEFAULT, O_RDONLY);
> +		if (fd == -1) {
> +			perror("open() failed\n");
> +			exit(1);
> +		}
> +	}
> +	memset(buf, 0, sizeof(buf));
> +	lseek(fd, 0, SEEK_SET);
> +	read(fd, buf, sizeof(buf));


This and the other tests are failing to build:

    In file included from dscr_default_test.c:16:0:
    dscr.h: In function ‘get_default_dscr’:
    dscr.h:93:6: error: ignoring return value of ‘read’, declared with attribute warn_unused_result [-Werror=unused-result]
      read(fd, buf, sizeof(buf));
          ^
    dscr.h: In function ‘set_default_dscr’:
    dscr.h:112:7: error: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Werror=unused-result]
      write(fd, buf, strlen(buf));
           ^
    cc1: all warnings being treated as errors

cheers
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/