Merge tag 'v3.10.103' into update

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / kernel / signal.c

diff --git a/kernel/signal.c b/kernel/signal.c
index 6217aa47d7e1e2a6883012cab0f8b543a5dbfabe..28db04b54a9bdea8ba8386d09e606dccd6242c4b 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2777,7 +2777,8 @@ int copy_siginfo_to_user(siginfo_t __user *to, siginfo_t *from)
                 * Other callers might not initialize the si_lsb field,
                 * so check explicitly for the right codes here.
                 */
-               if (from->si_code == BUS_MCEERR_AR || from->si_code == BUS_MCEERR_AO)
+               if (from->si_signo == SIGBUS &&
+                   (from->si_code == BUS_MCEERR_AR || from->si_code == BUS_MCEERR_AO))
                        err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb);
 #endif
                break;
@@ -3012,11 +3013,9 @@ static int do_rt_sigqueueinfo(pid_t pid, int sig, siginfo_t *info)
         * Nor can they impersonate a kill()/tgkill(), which adds source info.
         */
        if ((info->si_code >= 0 || info->si_code == SI_TKILL) &&
-           (task_pid_vnr(current) != pid)) {
-               /* We used to allow any < 0 si_code */
-               WARN_ON_ONCE(info->si_code < 0);
+           (task_pid_vnr(current) != pid))
                return -EPERM;
-       }
+
        info->si_signo = sig;
 
        /* POSIX.1b doesn't mention process groups.  */
@@ -3044,7 +3043,7 @@ COMPAT_SYSCALL_DEFINE3(rt_sigqueueinfo,
                        int, sig,
                        struct compat_siginfo __user *, uinfo)
 {
-       siginfo_t info;
+       siginfo_t info = {};
        int ret = copy_siginfo_from_user32(&info, uinfo);
        if (unlikely(ret))
                return ret;
@@ -3061,12 +3060,10 @@ static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info)
        /* Not even root can pretend to send signals from the kernel.
         * Nor can they impersonate a kill()/tgkill(), which adds source info.
         */
-       if (((info->si_code >= 0 || info->si_code == SI_TKILL)) &&
-           (task_pid_vnr(current) != pid)) {
-               /* We used to allow any < 0 si_code */
-               WARN_ON_ONCE(info->si_code < 0);
+       if ((info->si_code >= 0 || info->si_code == SI_TKILL) &&
+           (task_pid_vnr(current) != pid))
                return -EPERM;
-       }
+
        info->si_signo = sig;
 
        return do_send_specific(tgid, pid, sig, info);
@@ -3090,7 +3087,7 @@ COMPAT_SYSCALL_DEFINE4(rt_tgsigqueueinfo,
                        int, sig,
                        struct compat_siginfo __user *, uinfo)
 {
-       siginfo_t info;
+       siginfo_t info = {};
 
        if (copy_siginfo_from_user32(&info, uinfo))
                return -EFAULT;
@@ -3559,7 +3556,7 @@ SYSCALL_DEFINE0(pause)
 
 #endif
 
-int sigsuspend(sigset_t *set)
+static int sigsuspend(sigset_t *set)
 {
        current->saved_sigmask = current->blocked;
        set_current_blocked(set);