osf_wait4(): fix infoleak

commit a8c39544a6eb2093c04afd5005b6192bd0e880c6 upstream.

failing sys_wait4() won't fill struct rusage...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index ffb93f4..4f95577 100644 (file)
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -1188,8 +1188,10 @@ SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
        if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
                return -EFAULT;
 
-       err = 0;
-       err |= put_user(status, ustatus);
+       err = put_user(status, ustatus);
+       if (ret < 0)
+               return err ? err : ret;
+
        err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
        err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
        err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);