Stefan Dirsch
c4f62cf965
* Avoid access to System V shared memory segment on the X server
side for clients forwarded via SSH. Also prevent them from
hanging while waiting for the reply from the ShmCreateSegment
request. (boo#1097227)
OBS-URL: https://build.opensuse.org/package/show/X11:XOrg/xorg-x11-server?expand=0&rev=705
60 lines
1.6 KiB
Diff
60 lines
1.6 KiB
Diff
From ec7e2b54c5b4a34b2a077082967bc3ead30e227e Mon Sep 17 00:00:00 2001
|
|
From: Alexander Volkov <a.volkov@rusbitech.ru>
|
|
Date: Tue, 5 Jun 2018 13:05:39 +0300
|
|
Subject: [PATCH] Xext/shm: Refuse to work for remote clients
|
|
|
|
Avoid access to System V shared memory segment on the X server side
|
|
for clients forwarded via SSH. Also prevent them from hanging while
|
|
waiting for the reply from the ShmCreateSegment request.
|
|
|
|
v2: Allow ShmQueryVersion request even for remote clients
|
|
|
|
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=11080
|
|
Signed-off-by: Alexander Volkov <a.volkov@rusbitech.ru>
|
|
Reviewed-by: Adam Jackson <ajax@redhat.com>
|
|
---
|
|
Xext/shm.c | 18 ++++++++++++++----
|
|
1 file changed, 14 insertions(+), 4 deletions(-)
|
|
|
|
diff --git a/Xext/shm.c b/Xext/shm.c
|
|
index fc8441c43..896a966e3 100644
|
|
--- a/Xext/shm.c
|
|
+++ b/Xext/shm.c
|
|
@@ -1302,9 +1302,14 @@ static int
|
|
ProcShmDispatch(ClientPtr client)
|
|
{
|
|
REQUEST(xReq);
|
|
- switch (stuff->data) {
|
|
- case X_ShmQueryVersion:
|
|
+
|
|
+ if (stuff->data == X_ShmQueryVersion)
|
|
return ProcShmQueryVersion(client);
|
|
+
|
|
+ if (!client->local)
|
|
+ return BadRequest;
|
|
+
|
|
+ switch (stuff->data) {
|
|
case X_ShmAttach:
|
|
return ProcShmAttach(client);
|
|
case X_ShmDetach:
|
|
@@ -1461,9 +1466,14 @@ static int _X_COLD
|
|
SProcShmDispatch(ClientPtr client)
|
|
{
|
|
REQUEST(xReq);
|
|
- switch (stuff->data) {
|
|
- case X_ShmQueryVersion:
|
|
+
|
|
+ if (stuff->data == X_ShmQueryVersion)
|
|
return SProcShmQueryVersion(client);
|
|
+
|
|
+ if (!client->local)
|
|
+ return BadRequest;
|
|
+
|
|
+ switch (stuff->data) {
|
|
case X_ShmAttach:
|
|
return SProcShmAttach(client);
|
|
case X_ShmDetach:
|
|
--
|
|
2.16.3
|
|
|