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    Subject[PATCH 4.13 074/110] selftests/seccomp: Support glibc 2.26 siginfo_t.h
    Date
    4.13-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Kees Cook <keescook@chromium.org>

    commit 10859f3855db4c6f10dc7974ff4b3a292f3de8e0 upstream.

    The 2.26 release of glibc changed how siginfo_t is defined, and the earlier
    work-around to using the kernel definition are no longer needed. The old
    way needs to stay around for a while, though.

    Reported-by: Seth Forshee <seth.forshee@canonical.com>
    Cc: Andy Lutomirski <luto@amacapital.net>
    Cc: Will Drewry <wad@chromium.org>
    Cc: Shuah Khan <shuah@kernel.org>
    Cc: linux-kselftest@vger.kernel.org
    Signed-off-by: Kees Cook <keescook@chromium.org>
    Tested-by: Seth Forshee <seth.forshee@canonical.com>
    Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    tools/testing/selftests/seccomp/seccomp_bpf.c | 18 +++++++++++++-----
    1 file changed, 13 insertions(+), 5 deletions(-)

    --- a/tools/testing/selftests/seccomp/seccomp_bpf.c
    +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
    @@ -6,10 +6,18 @@
    */

    #include <sys/types.h>
    -#include <asm/siginfo.h>
    -#define __have_siginfo_t 1
    -#define __have_sigval_t 1
    -#define __have_sigevent_t 1
    +
    +/*
    + * glibc 2.26 and later have SIGSYS in siginfo_t. Before that,
    + * we need to use the kernel's siginfo.h file and trick glibc
    + * into accepting it.
    + */
    +#if !__GLIBC_PREREQ(2, 26)
    +# include <asm/siginfo.h>
    +# define __have_siginfo_t 1
    +# define __have_sigval_t 1
    +# define __have_sigevent_t 1
    +#endif

    #include <errno.h>
    #include <linux/filter.h>
    @@ -676,7 +684,7 @@ TEST_F_SIGNAL(TRAP, ign, SIGSYS)
    syscall(__NR_getpid);
    }

    -static struct siginfo TRAP_info;
    +static siginfo_t TRAP_info;
    static volatile int TRAP_nr;
    static void TRAP_action(int nr, siginfo_t *info, void *void_context)
    {

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