xorg-x11-server/u_busfault_sigaction-Only-initialize-pointer-when-matched.patch

From: Egbert Eich <eich@suse.de>
Date: Mon Jan 11 21:48:15 2016 +0100
Subject: [PATCH]busfault_sigaction: Only initialize pointer when matched
Patch-mainline: to be upstreamed

References: boo#961439
Signed-off-by: Egbert Eich <eich@suse.com>

When looping over the registered map ranges, don't use
the variable holding the final result as loop variable -
It would always be initialized, on an empty list or
when we run past the end of the list when no entry was
found.

Signed-off-by: Egbert Eich <eich@suse.de>
---
 os/busfault.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/os/busfault.c b/os/busfault.c
index d4afa6d..53f02e6 100644
--- a/os/busfault.c
+++ b/os/busfault.c
@@ -98,13 +98,15 @@ static void
 busfault_sigaction(int sig, siginfo_t *info, void *param)
 {
     void                *fault = info->si_addr;
-    struct busfault     *busfault = NULL;
+    struct busfault     *tmp, *busfault = NULL;
     void                *new_addr;
 
     /* Locate the faulting address in our list of shared segments
      */
-    xorg_list_for_each_entry(busfault, &busfaults, list) {
-        if ((char *) busfault->addr <= (char *) fault && (char *) fault < (char *) busfault->addr + busfault->size) {
+    xorg_list_for_each_entry(tmp, &busfaults, list) {
+        if ((char *) tmp->addr <= (char *) fault &&
+            (char *) fault < (char *) tmp->addr + tmp->size) {
+            busfault = tmp;
             break;
         }
     }