xserver-xorg: Backport fix for CVE-2024-31080

Upstream-Status: Backport [96798fc196]
(From OE-Core rev: f950b5a09c6dd19bdd5a942ae34516338e723942)

Signed-off-by: Ashish Sharma <asharma@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2024-31080.patch

@@ -0,0 +1,49 @@
+From 96798fc1967491c80a4d0c8d9e0a80586cb2152b Mon Sep 17 00:00:00 2001
+From: Alan Coopersmith <alan.coopersmith@oracle.com>
+Date: Fri, 22 Mar 2024 18:51:45 -0700
+Subject: [PATCH] Xi: ProcXIGetSelectedEvents needs to use unswapped length to
+ send reply
+
+CVE-2024-31080
+
+Reported-by: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=69762
+Fixes: 53e821ab4 ("Xi: add request processing for XIGetSelectedEvents.")
+Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
+Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1463>
+
+Upstream-Status: Backport [https://gitlab.freedesktop.org/xorg/xserver/-/commit/96798fc1967491c80a4d0c8d9e0a80586cb2152b]
+CVE: CVE-2024-31080
+Signed-off-by: Ashish Sharma <asharma@mvista.com>
+
+ Xi/xiselectev.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/Xi/xiselectev.c b/Xi/xiselectev.c
+index edcb8a0d36..ac14949871 100644
+--- a/Xi/xiselectev.c
++++ b/Xi/xiselectev.c
+@@ -349,6 +349,7 @@ ProcXIGetSelectedEvents(ClientPtr client)
+     InputClientsPtr others = NULL;
+     xXIEventMask *evmask = NULL;
+     DeviceIntPtr dev;
++    uint32_t length;
+ 
+     REQUEST(xXIGetSelectedEventsReq);
+     REQUEST_SIZE_MATCH(xXIGetSelectedEventsReq);
+@@ -418,10 +419,12 @@ ProcXIGetSelectedEvents(ClientPtr client)
+         }
+     }
+ 
++    /* save the value before SRepXIGetSelectedEvents swaps it */
++    length = reply.length;
+     WriteReplyToClient(client, sizeof(xXIGetSelectedEventsReply), &reply);
+ 
+     if (reply.num_masks)
+-        WriteToClient(client, reply.length * 4, buffer);
++        WriteToClient(client, length * 4, buffer);
+ 
+     free(buffer);
+     return Success;
+-- 
+GitLab
+

meta/recipes-graphics/xorg-xserver/xserver-xorg_1.20.14.bb

@@ -31,6 +31,7 @@ SRC_URI += "file://0001-xf86pciBus.c-use-Intel-ddx-only-for-pre-gen4-hardwar.pat
            file://CVE-2024-0408.patch \
            file://CVE-2024-0409.patch \
            file://CVE-2024-31081.patch \
+           file://CVE-2024-31080.patch \
 "
 SRC_URI[md5sum] = "453fc86aac8c629b3a5b77e8dcca30bf"
 SRC_URI[sha256sum] = "54b199c9280ff8bf0f73a54a759645bd0eeeda7255d1c99310d5b7595f3ac066"