From 35908b167f7785458bb452d1f331b0e6817971b6 Mon Sep 17 00:00:00 2001
From: drh <>
Date: Tue, 23 Aug 2022 17:51:39 +0000
Subject: [PATCH] Enhance assert() statements to enforce tighter bounds on the
 P5 operand of the OP_Next and OP_Prev opcodes.

FossilOrigin-Name: 4e0a07fc6f96e6e7726506b7a5ee942461c1381501f253893fa94d76023b634f
---
 manifest      | 14 +++++++-------
 manifest.uuid |  2 +-
 src/vdbe.c    |  8 ++++++--
 3 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/manifest b/manifest
index 9e35482a78..25ff34616d 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Add\smksourceid\sbinary\sto\sthe\sclean\srules\sand\s$(TESTPROGS)\sto\sdistclean.
-D 2022-08-23T16:55:19.945
+C Enhance\sassert()\sstatements\sto\senforce\stighter\sbounds\son\sthe\sP5\soperand\sof\nthe\sOP_Next\sand\sOP_Prev\sopcodes.
+D 2022-08-23T17:51:39.777
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -660,7 +660,7 @@ F src/upsert.c 8789047a8f0a601ea42fa0256d1ba3190c13746b6ba940fe2d25643a7e991937
 F src/utf.c ee39565f0843775cc2c81135751ddd93eceb91a673ea2c57f61c76f288b041a0
 F src/util.c 602fe229f32a96ceccae4f40824129669582096f7c355f53dbac156c9fecef23
 F src/vacuum.c bb346170b0b54c6683bba4a5983aea40485597fdf605c87ec8bc2e199fe88cd8
-F src/vdbe.c 4e57ac969bb2252598024ee3ebcb0885cb7976f1606e2bd77975a506da93ed50
+F src/vdbe.c 0150d16da21cb96b2b0f2880aad6acd80ddedf93a9f3eb2c5200aef864854fe6
 F src/vdbe.h 64619af62603dc3c4f5ff6ff6d2c8f389abd667a29ce6007ed44bd22b3211cd0
 F src/vdbeInt.h 2cad0aeeb106371ed0e0946bab89f60627087068847afc2451c05056961c18da
 F src/vdbeapi.c 6af7b32ada7ef8facafa91f57aedabd91633f254b34e9c0901ab402d4238e553
@@ -1999,8 +1999,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P c296a9d958ec360fc8d217363348b4918d665bccb3c4f27503a2dcef7db49052
-R 4d963a20dc8f72472e7e2a5f270fe9b3
-U stephan
-Z 2103395859f5e5eeef13bbb4c1cea65e
+P ae3e82f5a3332bea261aca6a0dd02063cf7056c023204cc10f1ae18d75249f91
+R 51ff0f60ce02e5f4651845198beeb063
+U drh
+Z 8ad404d5ff9703f3fbcf09dd071d939b
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 9551902b7f..ca66ad6f5b 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-ae3e82f5a3332bea261aca6a0dd02063cf7056c023204cc10f1ae18d75249f91
\ No newline at end of file
+4e0a07fc6f96e6e7726506b7a5ee942461c1381501f253893fa94d76023b634f
\ No newline at end of file
diff --git a/src/vdbe.c b/src/vdbe.c
index 2935d34d51..4d03320e53 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -6093,7 +6093,9 @@ case OP_SorterNext: {  /* jump */
 
 case OP_Prev:          /* jump */
   assert( pOp->p1>=0 && pOp->p1<p->nCursor );
-  assert( pOp->p5<ArraySize(p->aCounter) );
+  assert( pOp->p5==0
+       || pOp->p5==SQLITE_STMTSTATUS_FULLSCAN_STEP
+       || pOp->p5==SQLITE_STMTSTATUS_AUTOINDEX);
   pC = p->apCsr[pOp->p1];
   assert( pC!=0 );
   assert( pC->deferredMoveto==0 );
@@ -6106,7 +6108,9 @@ case OP_Prev:          /* jump */
 
 case OP_Next:          /* jump */
   assert( pOp->p1>=0 && pOp->p1<p->nCursor );
-  assert( pOp->p5<ArraySize(p->aCounter) );
+  assert( pOp->p5==0
+       || pOp->p5==SQLITE_STMTSTATUS_FULLSCAN_STEP
+       || pOp->p5==SQLITE_STMTSTATUS_AUTOINDEX);
   pC = p->apCsr[pOp->p1];
   assert( pC!=0 );
   assert( pC->deferredMoveto==0 );