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Backport NULL check to avoid a crash

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Resolves: https://issues.redhat.com/browse/RHEL-58444
This commit is contained in:
José Expósito 2024-09-13 16:40:30 +02:00
parent 39ea10b841
commit 15a649f949
2 changed files with 49 additions and 1 deletions
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40
0001-imDefLkup-verify-that-a-pointer-isn-t-NULL-before-us.patch Normal file
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@ -0,0 +1,40 @@
From 623b77d4f30b47258a40f89262e5aa5d25e95fa7 Mon Sep 17 00:00:00 2001
From: Benno Schulenberg <bensberg@telfort.nl>
Date: Mon, 14 Feb 2022 11:33:25 +0100
Subject: [PATCH] imDefLkup: verify that a pointer isn't NULL before using it
It is possible for _XimICOfXICID() to return NULL, so it is necessary
to check this isn't actually the case before dereferencing the pointer.
All other callers of _XimICOfXICID() do this check too.
(The check itself is ugly, but it follows the style of the code in the
rest of the module.)
Fixes issue #45.
Reported-by: Bhavi Dhingra
Original-patch-by: Bhavi Dhingra
Signed-off-by: Benno Schulenberg <bensberg@telfort.nl>
---
modules/im/ximcp/imDefLkup.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/modules/im/ximcp/imDefLkup.c b/modules/im/ximcp/imDefLkup.c
index dea7f66d..dd1adf53 100644
--- a/modules/im/ximcp/imDefLkup.c
+++ b/modules/im/ximcp/imDefLkup.c
@@ -88,7 +88,8 @@ _XimSetEventMaskCallback(
if (imid == im->private.proto.imid) {
if (icid) {
- ic = _XimICOfXICID(im, icid);
+ if (!(ic = _XimICOfXICID(im, icid)))
+ return False;
_XimProcICSetEventMask(ic, (XPointer)&buf_s[2]);
} else {
_XimProcIMSetEventMask(im, (XPointer)&buf_s[2]);
--
2.46.0

10
libX11.spec
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@ -5,7 +5,7 @@
Summary: Core X11 protocol client library
Name: libX11
Version: 1.6.8
Release: 8%{?gitdate:.%{gitdate}git%{gitversion}}%{?dist}
Release: 9%{?gitdate:.%{gitdate}git%{gitversion}}%{?dist}
License: MIT
Group: System Environment/Libraries
URL: http://www.x.org
@ -42,6 +42,9 @@ Patch12: 0001-CVE-2023-43787-Integer-overflow-in-XCreateImage-lead.patch
# RHEL-23452
Patch13: 0001-Avoid-recursing-through-_XError-due-to-sequence-adju.patch
# https://issues.redhat.com/browse/RHEL-58444
Patch14: 0001-imDefLkup-verify-that-a-pointer-isn-t-NULL-before-us.patch
BuildRequires: xorg-x11-util-macros >= 1.11
BuildRequires: pkgconfig(xproto) >= 7.0.15
BuildRequires: xorg-x11-xtrans-devel >= 1.0.3-4
@ -93,6 +96,7 @@ libX11/libxcb interoperability library
%patch11 -p1 -b .xcreatepixmap-trigger-badvalue-error-for-out-of-rang
%patch12 -p1 -b .cve-2023-43787
%patch13 -p1 -b .rhel-23452
%patch14 -p1 -b .rhel-58444
%build
autoreconf -v --install --force
@ -157,6 +161,10 @@ make %{?_smp_mflags} check
%{_mandir}/man5/*.5*
%changelog
* Fri Sep 13 2024 José Expósito <jexposit@redhat.com> - 1.6.8-9
- Backport NULL check to avoid a crash
Resolves: https://issues.redhat.com/browse/RHEL-58444
* Tue Jan 30 2024 Olivier Fourdan <ofourdan@redhat.com> - 1.6.8-8
- Backport fix for Xlib lockups due to recursive XError (RHEL-23452)