File U_Don-t-call-deleted-Block-WakeupHandler.patch of Package xorg-x11-server

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File U_Don-t-call-deleted-Block-WakeupHandler.patch of Package xorg-x11-server (Revision aa466945ad6c227113f9f538ad69dc6f)

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From: Egbert Eich <eich@suse.de>
Date: Tue Oct 18 20:22:38 2011 +0200
Subject: [PATCH] Don't call deleted Bloxk/WakeupHandler()
Patch-Mainline: Upstream/2ee85d95
Git-commit: b93eda251f0b6d0a1601511a55b060604919cc81
References: bnc #723777
Signed-off-by: Egbert Eich <eich@suse.de>

When Block/WakeupHandlers are unregistered from within a handler the
list of handlers is not corrected right away but they are marked as
deleted.
If a deleted handler in the handler list is located after the handler
that calls the unregister function it was still called, as the list was
only corrected after all handlers were processed. This could cause a
crash if the handler got passed a pointer to a data structure which was
no longer existing.
A check for the deleted flag solves this problem.

Signed-off-by: Egbert Eich <eich@suse.de>
---
 xorg-server-1.10.4/dix/dixutils.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/xorg-server-1.10.4/dix/dixutils.c b/xorg-server-1.10.4/dix/dixutils.c
index 104363b..dd1c318 100644
--- a/xorg-server-1.10.4/dix/dixutils.c
+++ b/xorg-server-1.10.4/dix/dixutils.c
@@ -386,8 +386,9 @@ BlockHandler(pointer pTimeout, pointer pReadmask)
 				screenInfo.screens[i]->blockData,
 				pTimeout, pReadmask);
     for (i = 0; i < numHandlers; i++)
-	(*handlers[i].BlockHandler) (handlers[i].blockData,
-				     pTimeout, pReadmask);
+        if (!handlers[i].deleted)
+	    (*handlers[i].BlockHandler) (handlers[i].blockData,
+					 pTimeout, pReadmask);
     if (handlerDeleted)
     {
 	for (i = 0; i < numHandlers;)
@@ -416,8 +417,9 @@ WakeupHandler(int result, pointer pReadmask)
 
     ++inHandler;
     for (i = numHandlers - 1; i >= 0; i--)
-	(*handlers[i].WakeupHandler) (handlers[i].blockData,
-				      result, pReadmask);
+        if (!handlers[i].deleted)
+	    (*handlers[i].WakeupHandler) (handlers[i].blockData,
+					  result, pReadmask);
     for (i = 0; i < screenInfo.numScreens; i++)
 	(* screenInfo.screens[i]->WakeupHandler)(i, 
 				screenInfo.screens[i]->wakeupData,

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File U_Don-t-call-deleted-Block-WakeupHandler.patch of Package xorg-x11-server (Revision aa466945ad6c227113f9f538ad69dc6f)

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