Import SQLite 3.8.7.4.

third_party/sqlite/patches/0009-fts3-Interior-node-corruption-detection.patch

-From 88d98dd2627e3dad4685443441fcd99a6ba61642 Mon Sep 17 00:00:00 2001
+From ce5e0e867ac54738b813c800cf1a0545258189bc 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.
+Subject: [PATCH 09/16] [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(-)
+ third_party/sqlite/src/ext/fts3/fts3.c | 10 ++++++++--
+ 1 file changed, 8 insertions(+), 2 deletions(-)
 
 diff --git a/third_party/sqlite/src/ext/fts3/fts3.c b/third_party/sqlite/src/ext/fts3/fts3.c
-index da55f2a..d11572a 100644
+index dbd2835..3a1152d 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(
+@@ -1773,8 +1773,14 @@ static int fts3ScanInteriorNode(
      isFirstTerm = 0;
-     zCsr += sqlite3Fts3GetVarint32(zCsr, &nSuffix);
+     zCsr += fts3GetVarint32(zCsr, &nSuffix);
      
 -    if( nPrefix<0 || nSuffix<0 || &zCsr[nSuffix]>zEnd ){
+-      rc = FTS_CORRUPT_VTAB;
 +    /* 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;
++      rc = SQLITE_CORRUPT;
        goto finish_scan;
      }
+     if( nPrefix+nSuffix>nAlloc ){
 -- 
 2.2.1