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From 16c5290d72cb8059e9dfe545613183b850fc44e4 Mon Sep 17 00:00:00 2001
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From: Ondrej Dubaj <odubaj@redhat.com>
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Date: Mon, 20 Jan 2020 10:26:35 +0100
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Subject: [PATCH] Fix the zipfile() function in the zipfile extension so that
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it is able to
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deal with goofy filenames that contain embedded zeros.
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---
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ext/misc/zipfile.c | 4 ++--
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test/zipfile.test | 13 +++++++++++++
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2 files changed, 15 insertions(+), 2 deletions(-)
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diff --git a/ext/misc/zipfile.c b/ext/misc/zipfile.c
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index 6f48d0f..e6141ef 100644
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--- a/ext/misc/zipfile.c
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+++ b/ext/misc/zipfile.c
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@@ -1632,7 +1632,7 @@ static int zipfileUpdate(
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zFree = sqlite3_mprintf("%s/", zPath);
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if( zFree==0 ){ rc = SQLITE_NOMEM; }
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zPath = (const char*)zFree;
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- nPath++;
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+ nPath = (int)strlen(zPath);
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}
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}
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@@ -2033,11 +2033,11 @@ void zipfileStep(sqlite3_context *pCtx, int nVal, sqlite3_value **apVal){
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}else{
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if( zName[nName-1]!='/' ){
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zName = zFree = sqlite3_mprintf("%s/", zName);
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- nName++;
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if( zName==0 ){
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rc = SQLITE_NOMEM;
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goto zipfile_step_out;
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}
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+ nName = (int)strlen(zName);
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}else{
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while( nName>1 && zName[nName-2]=='/' ) nName--;
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}
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diff --git a/test/zipfile.test b/test/zipfile.test
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index 5bca10b..e4b8088 100644
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--- a/test/zipfile.test
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+++ b/test/zipfile.test
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@@ -808,4 +808,17 @@ do_execsql_test 13.10 {
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quote(data),quote(method) FROM t1;
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} {'' 10 10 2 X'3130' X'3130' 0}
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+# 2019-12-23 Yongheng and Rui fuzzer
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+# Run using valgrind to see the problem.
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+#
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+do_execsql_test 14.10 {
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+ DROP TABLE t1;
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+ CREATE TABLE t1(x char);
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+ INSERT INTO t1(x) VALUES('1');
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+ INSERT INTO t1(x) SELECT zipfile(x, 'xyz') FROM t1;
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+ INSERT INTO t1(x) SELECT zipfile(x, 'uvw') FROM t1;
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+ SELECT count(*) FROM t1;
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+ PRAGMA integrity_check;
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+} {3 ok}
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+
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finish_test
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--
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2.19.1
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