Fix potential memory leaks in the misc 'compress' extension.

FossilOrigin-Name: 3bc34fd427d9d7819cd9740237b1f5d4180341fa

ext/misc/compress.c

@@ -38,6 +38,7 @@ static void compressFunc(
   unsigned int nIn;
   unsigned long int nOut;
   unsigned char x[8];
+  int rc;
   int i, j;
 
   pIn = sqlite3_value_blob(argv[0]);
@@ -50,8 +51,12 @@ static void compressFunc(
   for(i=0; i<4 && x[i]==0; i++){}
   for(j=0; i<=4; i++, j++) pOut[j] = x[i];
   pOut[j-1] |= 0x80;
-  compress(&pOut[j], &nOut, pIn, nIn);
-  sqlite3_result_blob(context, pOut, nOut+j, sqlite3_free);
+  rc = compress(&pOut[j], &nOut, pIn, nIn);
+  if( rc==Z_OK ){
+    sqlite3_result_blob(context, pOut, nOut+j, sqlite3_free);
+  }else{
+    sqlite3_free(pOut);
+  }
 }
 
 /*
@@ -82,6 +87,8 @@ static void uncompressFunc(
   rc = uncompress(pOut, &nOut, &pIn[i], nIn-i);
   if( rc==Z_OK ){
     sqlite3_result_blob(context, pOut, nOut, sqlite3_free);
+  }else{
+    sqlite3_free(pOut);
   }
 }
 

manifest

@@ -1,5 +1,5 @@
-C Update\sa\srequirements\smark\sto\sreflect\sa\schange\sof\swording\sin\sthe\sdocumentation.\nNo\schanges\sto\scode.
-D 2015-02-26T16:40:41.460
+C Fix\spotential\smemory\sleaks\sin\sthe\smisc\s'compress'\sextension.
+D 2015-02-26T21:04:44.709
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 6b9e7677829aa94b9f30949656e27312aefb9a46
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -108,7 +108,7 @@ F ext/icu/icu.c d415ccf984defeb9df2c0e1afcfaa2f6dc05eacb
 F ext/icu/sqliteicu.h 728867a802baa5a96de7495e9689a8e01715ef37
 F ext/misc/amatch.c 27b9b601fb1453084e18a3432ea0240d7af8decb
 F ext/misc/closure.c 636024302cde41b2bf0c542f81c40c624cfb7012
-F ext/misc/compress.c 76e45655f4046e756064ab10c62e18f2eb846b9f
+F ext/misc/compress.c 122faa92d25033d6c3f07c39231de074ab3d2e83
 F ext/misc/eval.c f971962e92ebb8b0a4e6b62949463ee454d88fa2
 F ext/misc/fileio.c d4171c815d6543a9edef8308aab2951413cd8d0f
 F ext/misc/fuzzer.c e3e18f47252c151b5553d7e806f38e757d37c4cc
@@ -1239,7 +1239,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P a62ba58c737656fae620d9cdaaae299104ac06f6
-R 10478383687ae87f2012aeaa926b3297
-U drh
-Z ebf66855f11c3f65a39c6b4bb93adf68
+P 3038d0169bfc3f63d64c7fef20ab2323d032655f
+R 92275b863621a447a1ee2bc5287be291
+U mistachkin
+Z 13fe93e6bf28cbbfddb5268264090ce6

manifest.uuid

@@ -1 +1 @@
-3038d0169bfc3f63d64c7fef20ab2323d032655f
+3bc34fd427d9d7819cd9740237b1f5d4180341fa