Import SQLite 3.8.7.4.

third_party/sqlite/patches/0015-fts3-Interior-node-corruption-detection.patch

-From 88d98dd2627e3dad4685443441fcd99a6ba61642 Mon Sep 17 00:00:00 2001
-From: Scott Hess <shess@chromium.org>
-Date: Thu, 26 May 2011 18:44:46 +0000
-Subject: [PATCH 15/23] [fts3] Interior node corruption detection.
-
-In auditing as part of a previous import, I noticed this case which
-seemed to allow for buffer overrun.  The nPrefix check was commented out
-because nBuffer wasn't always initialized, and I never circled back to
-resolve that.
-
-It may be appropriate to just drop this patch, for now leaving it for
-consistency.
-
-BUG=84057, 83946
-
-Original review URLs:
-http://codereview.chromium.org/7075014
-http://codereview.chromium.org/6990047 (3.7.6.3 SQLite import)
----
- third_party/sqlite/src/ext/fts3/fts3.c | 8 +++++++-
- 1 file changed, 7 insertions(+), 1 deletion(-)
-
-diff --git a/third_party/sqlite/src/ext/fts3/fts3.c b/third_party/sqlite/src/ext/fts3/fts3.c
-index da55f2a..d11572a 100644
---- a/third_party/sqlite/src/ext/fts3/fts3.c
-+++ b/third_party/sqlite/src/ext/fts3/fts3.c
-@@ -1230,7 +1230,13 @@ static int fts3ScanInteriorNode(
-     isFirstTerm = 0;
-     zCsr += sqlite3Fts3GetVarint32(zCsr, &nSuffix);
-     
--    if( nPrefix<0 || nSuffix<0 || &zCsr[nSuffix]>zEnd ){
-+    /* NOTE(shess): Previous code checked for negative nPrefix and
-+    ** nSuffix and suffix overrunning zEnd.  Additionally corrupt if
-+    ** the prefix is longer than the previous term, or if the suffix
-+    ** causes overflow.
-+    */
-+    if( nPrefix<0 || nSuffix<0 /* || nPrefix>nBuffer */
-+     || &zCsr[nSuffix]<zCsr || &zCsr[nSuffix]>zEnd ){
-       rc = SQLITE_CORRUPT;
-       goto finish_scan;
-     }
--- 
-2.2.1
-