sqlite3: CVE-2018-8740

* CVE-2018-8740
In SQLite through 3.22.0, databases whose schema is corrupted
using a CREATE TABLE AS statement could cause a NULL pointer dereference,
related to build.c and prepare.c.

Affects sqlite3 <= 3.22.0

CVE: CVE-2018-8740
Ref: https://access.redhat.com/security/cve/cve-2018-8740
(From OE-Core rev: 0469c075d904026ec37214fb39397bb1cb07ab43)

Signed-off-by: Sinan Kaya <okaya@kernel.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 48 insertions, 0 deletions

diff --git a/meta/recipes-support/sqlite/files/CVE-2018-8740.patch b/meta/recipes-support/sqlite/files/CVE-2018-8740.patch
new file mode 100644
index 0000000000..5d95e37afe
--- /dev/null
+++ b/meta/recipes-support/sqlite/files/CVE-2018-8740.patch
@@ -0,0 +1,47 @@
+From 19aed4d2be46c4516caf2bee31f79044bbd1d57d Mon Sep 17 00:00:00 2001
+From: Sinan Kaya <okaya@kernel.org>
+Date: Fri, 21 Sep 2018 16:22:01 +0000
+Subject: [PATCH] Detect databases whose schema is corrupted using a CREATE TABLE AS statement and issue an appropriate error message
+
+Upstream-Status: Backport [ https://www.sqlite.org/cgi/src/vdiff?from=1774f1c3baf0bc3d&to=d75e67654aa9620b&diff=1&w]
+Signed-off-by: Sinan Kaya <okaya@kernel.org>
+---
+ sqlite3.c | 8 +++++---
+ 1 file changed, 5 insertions(+), 3 deletions(-)
+
+diff --git a/sqlite3.c b/sqlite3.c
+index 73c69ef..6863bc6 100644
+--- a/sqlite3.c
++++ b/sqlite3.c
+@@ -103474,8 +103474,6 @@ SQLITE_PRIVATE void sqlite3EndTable(
+   p = pParse->pNewTable;
+   if( p==0 ) return;
+ 
+-  assert( !db->init.busy || !pSelect );
+-
+   /* If the db->init.busy is 1 it means we are reading the SQL off the
+   ** "sqlite_master" or "sqlite_temp_master" table on the disk.
+   ** So do not write to the disk again.  Extract the root page number
+@@ -103486,6 +103484,10 @@ SQLITE_PRIVATE void sqlite3EndTable(
+   ** table itself.  So mark it read-only.
+   */
+   if( db->init.busy ){
++    if( pSelect ){
++     sqlite3ErrorMsg(pParse, "");
++     return;
++    }
+     p->tnum = db->init.newTnum;
+     if( p->tnum==1 ) p->tabFlags |= TF_Readonly;
+   }
+@@ -117813,7 +117815,7 @@ static void corruptSchema(
+     char *z;
+     if( zObj==0 ) zObj = "?";
+     z = sqlite3MPrintf(db, "malformed database schema (%s)", zObj);
+-    if( zExtra ) z = sqlite3MPrintf(db, "%z - %s", z, zExtra);
++    if( zExtra && zExtra[0] ) z = sqlite3MPrintf(db, "%z - %s", z, zExtra);
+     sqlite3DbFree(db, *pData->pzErrMsg);
+     *pData->pzErrMsg = z;
+   }
+-- 
+2.19.0
+
diff --git a/meta/recipes-support/sqlite/sqlite3_3.22.0.bb b/meta/recipes-support/sqlite/sqlite3_3.22.0.bb
index ef88659e97..b90f89886a 100644
--- a/meta/recipes-support/sqlite/sqlite3_3.22.0.bb
+++ b/meta/recipes-support/sqlite/sqlite3_3.22.0.bb
@@ -5,6 +5,7 @@ LIC_FILES_CHKSUM = "file://sqlite3.h;endline=11;md5=786d3dc581eff03f4fd9e4a77ed0
 
 SRC_URI = "\
   http://www.sqlite.org/2018/sqlite-autoconf-${SQLITE_PV}.tar.gz \
+  file://CVE-2018-8740.patch \
   "
 SRC_URI[md5sum] = "96b5648d542e8afa6ab7ffb8db8ddc3d"
 SRC_URI[sha256sum] = "2824ab1238b706bc66127320afbdffb096361130e23291f26928a027b885c612"