From 8820250e8daac4a1f7884dd1d489b01f35e015da Mon Sep 17 00:00:00 2001
From: drh <drh@noemail.net>
Date: Wed, 9 Sep 2015 19:27:10 +0000
Subject: [PATCH] Fix a possible NULL pointer deref when using
 SQLITE_ENABLE_MEMORY_MANAGEMENT.

FossilOrigin-Name: 89bfdbfe943adce8e02c84ede014fcfed504c5d3
---
 manifest      | 14 +++++++-------
 manifest.uuid |  2 +-
 src/pcache1.c |  3 ++-
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/manifest b/manifest
index 3bd890e596..e79b93894d 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Fix\sharmless\scompiler\swarning.
-D 2015-09-09T17:23:48.211
+C Fix\sa\spossible\sNULL\spointer\sderef\swhen\susing\sSQLITE_ENABLE_MEMORY_MANAGEMENT.
+D 2015-09-09T19:27:10.029
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in f85066ce844a28b671aaeeff320921cd0ce36239
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -331,7 +331,7 @@ F src/pager.h 6d435f563b3f7fcae4b84433b76a6ac2730036e2
 F src/parse.y f599aa5e871a493330d567ced93de696f61f48f7
 F src/pcache.c 24be750c79272e0ca7b6e007bc94999700f3e5ef
 F src/pcache.h 9968603796240cdf83da7e7bef76edf90619cea9
-F src/pcache1.c bf2afe64a3dedb8643c8dcbd94a145cc80ab2a67
+F src/pcache1.c ca0eeaaf9ffab7a9ded47d54639d8ab147d442e6
 F src/pragma.c d71b813e67bf03f3116b9dd5164fbfd81ec673a2
 F src/pragma.h 631a91c8b0e6ca8f051a1d8a4a0da4150e04620a
 F src/prepare.c 82e5db1013846a819f198336fed72c44c974e7b1
@@ -1383,7 +1383,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 2cdb18778f20baa902e54f218ba26d2bacf0801e
-R acfdd2857f10498b6f74f8764b68244c
-U mistachkin
-Z 4d9c06d0e6e18e1cffef7b0cc1d40a2c
+P 280fd3a482978b4a488a8b425721e451c2a30745
+R 931638393b6c80a6b7791df11d019edc
+U drh
+Z 7c6427f02c08a37206c926b94f51cdad
diff --git a/manifest.uuid b/manifest.uuid
index e1ab0294e9..8018c18b5a 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-280fd3a482978b4a488a8b425721e451c2a30745
\ No newline at end of file
+89bfdbfe943adce8e02c84ede014fcfed504c5d3
\ No newline at end of file
diff --git a/src/pcache1.c b/src/pcache1.c
index 2fed0bdff1..1beb66d733 100644
--- a/src/pcache1.c
+++ b/src/pcache1.c
@@ -1193,7 +1193,8 @@ int sqlite3PcacheReleaseMemory(int nReq){
     PgHdr1 *p;
     pcache1EnterMutex(&pcache1.grp);
     while( (nReq<0 || nFree<nReq)
-       &&  (p=pcache1.grp.lru.pLruPrev)->isAnchor==0
+       &&  (p=pcache1.grp.lru.pLruPrev)!=0
+       &&  p->isAnchor==0
     ){
       nFree += pcache1MemSize(p->page.pBuf);
 #ifdef SQLITE_PCACHE_SEPARATE_HEADER