mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-13 18:04:35 -05:00
124 lines
3.8 KiB
Diff
124 lines
3.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Nick Wellnhofer <wellnhofer@aevum.de>
|
|
Date: Fri, 17 Feb 2023 15:53:07 +0100
|
|
Subject: [PATCH] malloc-fail: Fix OOB read after xmlRegGetCounter
|
|
|
|
Found with libFuzzer, see #344.
|
|
|
|
(cherry picked from commit 1743c4c3fc58cf38ecce68db9de51d0f3651e033)
|
|
|
|
I also copied the error label from
|
|
e64653c0e7975594e27d7de2ed4be062c1e4ad03 to fix the build failure.
|
|
|
|
Bug: http://b/274231102
|
|
Test: TreeHugger
|
|
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:381160fc2a293d50a627c9e35bb34485bf97b6e7)
|
|
Merged-In: I3bad3e03092e17a761cb6e299aff848ebd35b6f4
|
|
Change-Id: I3bad3e03092e17a761cb6e299aff848ebd35b6f4
|
|
---
|
|
xmlregexp.c | 28 ++++++++++++++++++++++++++++
|
|
1 file changed, 28 insertions(+)
|
|
|
|
diff --git a/xmlregexp.c b/xmlregexp.c
|
|
index d255fbf0..6234a879 100644
|
|
--- a/xmlregexp.c
|
|
+++ b/xmlregexp.c
|
|
@@ -1641,6 +1641,8 @@ xmlFAGenerateTransitions(xmlRegParserCtxtPtr ctxt, xmlRegStatePtr from,
|
|
return(-1);
|
|
inter = ctxt->state;
|
|
counter = xmlRegGetCounter(ctxt);
|
|
+ if (counter < 0)
|
|
+ return(-1);
|
|
ctxt->counters[counter].min = atom->min - 1;
|
|
ctxt->counters[counter].max = atom->max - 1;
|
|
/* count the number of times we see it again */
|
|
@@ -1659,6 +1661,8 @@ xmlFAGenerateTransitions(xmlRegParserCtxtPtr ctxt, xmlRegStatePtr from,
|
|
* epsilon transition.
|
|
*/
|
|
counter = xmlRegGetCounter(ctxt);
|
|
+ if (counter < 0)
|
|
+ return(-1);
|
|
ctxt->counters[counter].min = atom->min - 1;
|
|
ctxt->counters[counter].max = atom->max - 1;
|
|
/* count the number of times we see it again */
|
|
@@ -5924,6 +5928,8 @@ xmlAutomataNewCountTrans2(xmlAutomataPtr am, xmlAutomataStatePtr from,
|
|
* associate a counter to the transition.
|
|
*/
|
|
counter = xmlRegGetCounter(am);
|
|
+ if (counter < 0)
|
|
+ goto error;
|
|
am->counters[counter].min = min;
|
|
am->counters[counter].max = max;
|
|
|
|
@@ -5943,6 +5949,10 @@ xmlAutomataNewCountTrans2(xmlAutomataPtr am, xmlAutomataStatePtr from,
|
|
if (min == 0)
|
|
xmlFAGenerateEpsilonTransition(am, from, to);
|
|
return(to);
|
|
+
|
|
+error:
|
|
+ xmlRegFreeAtom(atom);
|
|
+ return(NULL);
|
|
}
|
|
|
|
/**
|
|
@@ -5990,6 +6000,8 @@ xmlAutomataNewCountTrans(xmlAutomataPtr am, xmlAutomataStatePtr from,
|
|
* associate a counter to the transition.
|
|
*/
|
|
counter = xmlRegGetCounter(am);
|
|
+ if (counter < 0)
|
|
+ goto error;
|
|
am->counters[counter].min = min;
|
|
am->counters[counter].max = max;
|
|
|
|
@@ -6009,6 +6021,10 @@ xmlAutomataNewCountTrans(xmlAutomataPtr am, xmlAutomataStatePtr from,
|
|
if (min == 0)
|
|
xmlFAGenerateEpsilonTransition(am, from, to);
|
|
return(to);
|
|
+
|
|
+error:
|
|
+ xmlRegFreeAtom(atom);
|
|
+ return(NULL);
|
|
}
|
|
|
|
/**
|
|
@@ -6076,6 +6092,8 @@ xmlAutomataNewOnceTrans2(xmlAutomataPtr am, xmlAutomataStatePtr from,
|
|
* associate a counter to the transition.
|
|
*/
|
|
counter = xmlRegGetCounter(am);
|
|
+ if (counter < 0)
|
|
+ goto error;
|
|
am->counters[counter].min = 1;
|
|
am->counters[counter].max = 1;
|
|
|
|
@@ -6088,6 +6106,10 @@ xmlAutomataNewOnceTrans2(xmlAutomataPtr am, xmlAutomataStatePtr from,
|
|
xmlRegAtomPush(am, atom);
|
|
am->state = to;
|
|
return(to);
|
|
+
|
|
+error:
|
|
+ xmlRegFreeAtom(atom);
|
|
+ return(NULL);
|
|
}
|
|
|
|
|
|
@@ -6135,6 +6157,8 @@ xmlAutomataNewOnceTrans(xmlAutomataPtr am, xmlAutomataStatePtr from,
|
|
* associate a counter to the transition.
|
|
*/
|
|
counter = xmlRegGetCounter(am);
|
|
+ if (counter < 0)
|
|
+ goto error;
|
|
am->counters[counter].min = 1;
|
|
am->counters[counter].max = 1;
|
|
|
|
@@ -6147,6 +6171,10 @@ xmlAutomataNewOnceTrans(xmlAutomataPtr am, xmlAutomataStatePtr from,
|
|
xmlRegAtomPush(am, atom);
|
|
am->state = to;
|
|
return(to);
|
|
+
|
|
+error:
|
|
+ xmlRegFreeAtom(atom);
|
|
+ return(NULL);
|
|
}
|
|
|
|
/**
|