Check for OOM sqlite_value_x() returns in base64, base85 extensions.

FossilOrigin-Name: e6f9c0b1f963033a8e17d13935c5c6b12d263fe10c585035a3d1f1154c6ba5d6

ext/misc/base64.c

@@ -219,9 +219,16 @@ static void base64(sqlite3_context *context, int na, sqlite3_value *av[]){
       sqlite3_result_error(context, "blob expanded to base64 too big", -1);
       return;
     }
+    bBuf = (u8*)sqlite3_value_blob(av[0]);
+    if( !bBuf ){
+      if( SQLITE_NOMEM==sqlite3_errcode(sqlite3_context_db_handle(context)) ){
+        goto memFail;
+      }
+      sqlite3_result_text(context,"",-1,SQLITE_STATIC);
+      break;
+    }
     cBuf = sqlite3_malloc(nc);
     if( !cBuf ) goto memFail;
-    bBuf = (u8*)sqlite3_value_blob(av[0]);
     nc = (int)(toBase64(bBuf, nb, cBuf) - cBuf);
     sqlite3_result_text(context, cBuf, nc, sqlite3_free);
     break;
@@ -234,9 +241,16 @@ static void base64(sqlite3_context *context, int na, sqlite3_value *av[]){
     }else if( nb<1 ){
       nb = 1;
     }
+    cBuf = (char *)sqlite3_value_text(av[0]);
+    if( !cBuf ){
+      if( SQLITE_NOMEM==sqlite3_errcode(sqlite3_context_db_handle(context)) ){
+        goto memFail;
+      }
+      sqlite3_result_zeroblob(context, 0);
+      break;
+    }
     bBuf = sqlite3_malloc(nb);
     if( !bBuf ) goto memFail;
-    cBuf = (char *)sqlite3_value_text(av[0]);
     nb = (int)(fromBase64(cBuf, nc, bBuf) - bBuf);
     sqlite3_result_blob(context, bBuf, nb, sqlite3_free);
     break;

ext/misc/base85.c

@@ -297,9 +297,16 @@ static void base85(sqlite3_context *context, int na, sqlite3_value *av[]){
       sqlite3_result_error(context, "blob expanded to base85 too big", -1);
       return;
     }
+    bBuf = (u8*)sqlite3_value_blob(av[0]);
+    if( !bBuf ){
+      if( SQLITE_NOMEM==sqlite3_errcode(sqlite3_context_db_handle(context)) ){
+        goto memFail;
+      }
+      sqlite3_result_text(context,"",-1,SQLITE_STATIC);
+      break;
+    }
     cBuf = sqlite3_malloc(nc);
     if( !cBuf ) goto memFail;
-    bBuf = (u8*)sqlite3_value_blob(av[0]);
     nc = (int)(toBase85(bBuf, nb, cBuf, "\n") - cBuf);
     sqlite3_result_text(context, cBuf, nc, sqlite3_free);
     break;
@@ -312,9 +319,16 @@ static void base85(sqlite3_context *context, int na, sqlite3_value *av[]){
     }else if( nb<1 ){
       nb = 1;
     }
+    cBuf = (char *)sqlite3_value_text(av[0]);
+    if( !cBuf ){
+      if( SQLITE_NOMEM==sqlite3_errcode(sqlite3_context_db_handle(context)) ){
+        goto memFail;
+      }
+      sqlite3_result_zeroblob(context, 0);
+      break;
+    }
     bBuf = sqlite3_malloc(nb);
     if( !bBuf ) goto memFail;
-    cBuf = (char *)sqlite3_value_text(av[0]);
     nb = (int)(fromBase85(cBuf, nc, bBuf) - bBuf);
     sqlite3_result_blob(context, bBuf, nb, sqlite3_free);
     break;

manifest

@@ -1,5 +1,5 @@
-C Update\sthe\scompile-time\sdetection\sof\sarchitecture\sbyte-order\sin\sthe\sRTREE\nextension\sso\sthat\sit\sis\saligned\swith\sthe\slatest\senhancements\sin\sthe\score.
-D 2023-04-24T19:23:42.196
+C Check\sfor\sOOM\ssqlite_value_x()\sreturns\sin\sbase64,\sbase85\sextensions.
+D 2023-04-25T02:44:53.418
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -271,8 +271,8 @@ F ext/misc/README.md d6dd0fe1d8af77040216798a6a2b0c46c73054d2f0ea544fbbcdccf6f23
 F ext/misc/amatch.c e3ad5532799cee9a97647f483f67f43b38796b84b5a8c60594fe782a4338f358
 F ext/misc/anycollseq.c 5ffdfde9829eeac52219136ad6aa7cd9a4edb3b15f4f2532de52f4a22525eddb
 F ext/misc/appendvfs.c 9642c7a194a2a25dca7ad3e36af24a0a46d7702168c4ad7e59c9f9b0e16a3824
-F ext/misc/base64.c e83a915fcb94c9332e9a92aa4c3beafe2552bd3da2813fc5fff31918cca0b834
-F ext/misc/base85.c 77dfd5813d23ea561d0348f922583888e78f8eaeb2b9a4a28226d092389890b8
+F ext/misc/base64.c 46e2a52e4c39b60c2b3be84001b603f9817dc90b2aba545942a1cda2b127f0be
+F ext/misc/base85.c fed8e065a5eb01f70de57462dd488705cfe86120df28c39df1dad7c3470d8d89
 F ext/misc/basexx.c 5e859e1820620aa8080fb9145eb47089de426ae808f6abb01a8e12921c3a8e67
 F ext/misc/blobio.c a867c4c4617f6ec223a307ebfe0eabb45e0992f74dd47722b96f3e631c0edb2a
 F ext/misc/btreeinfo.c d28ce349b40054eaa9473e835837bad7a71deec33ba13e39f963d50933bfa0f9
@@ -2059,9 +2059,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P e79c95fc130fc302719690eb6391d96070aff825b2b51ef6c4ad459d9a8918d7
-Q +491bd51da5e2069078d7295396d80d2ccdc3a5871714fef948076939174e6acd
-R 0ddcb2c385e38b7edc9b293e66b74615
-U drh
-Z 660ef923c98b6f83ec3ee30adf820b34
+P 122431d3a7267ec83768316ab146c0557fb6c0577a4a47ac6ed3d7aa6811ca9a
+R 3428184709b95547abf99ded23dd44a2
+U larrybr
+Z e09ba3c72f888e22a41c09e468a29a9d
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-122431d3a7267ec83768316ab146c0557fb6c0577a4a47ac6ed3d7aa6811ca9a
+e6f9c0b1f963033a8e17d13935c5c6b12d263fe10c585035a3d1f1154c6ba5d6