Detect malformed nested JSONB earlier and stop rendering to avoid long

delays.

FossilOrigin-Name: ab40e282465c989bf249453d7c6f60072a38b691f579411cdf9aad234b20f0f7

Author: drh

manifest

@@ -1,5 +1,5 @@
-C Avoid\sa\spotential\sbuffer\soverread\swhen\shandling\scorrupt\sjson\sblobs.
-D 2024-01-29T16:49:28.555
+C Detect\smalformed\snested\sJSONB\searlier\sand\sstop\srendering\sto\savoid\slong\ndelays.
+D 2024-01-29T21:29:22.163
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -697,7 +697,7 @@ F src/hash.h 3340ab6e1d13e725571d7cee6d3e3135f0779a7d8e76a9ce0a85971fa3953c51
 F src/hwtime.h f9c2dfb84dce7acf95ce6d289e46f5f9d3d1afd328e53da8f8e9008e3b3caae6
 F src/in-operator.md 10cd8f4bcd225a32518407c2fb2484089112fd71
 F src/insert.c 3f0a94082d978bbdd33c38fefea15346c6c6bffb70bc645a71dc0f1f87dd3276
-F src/json.c 2bc8eeedb7ac052292c3dc795a89ca72f43e71e8156d515e12bdf4ba9bc7bbb1
+F src/json.c 31eb3e138661284bc561dd8d23b948126716847571d5b6e86044a284fce81cde
 F src/legacy.c d7874bc885906868cd51e6c2156698f2754f02d9eee1bae2d687323c3ca8e5aa
 F src/loadext.c 7432c944ff197046d67a1207790a1b13eec4548c85a9457eb0896bb3641dfb36
 F src/main.c 438b95162acfa17b7d218f586f5bde11d6ae82bcf030c9611fc537556870ad6b
@@ -2159,9 +2159,10 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 3ab08ac75d97ffd9920f5c924362a4819560b40faa8a4f9100068057f5fa420a
-Q +738473dc0ac353731080d0785cc7dc9810b564906c176916bd91d6cfbb1a7b18
-R 05d394f6285eeb07155f6458b5abf806
+P ac402cc551b2cbe3f8fbbc9c711a04942eab5eeb9d2f4a394e9370d2380427b5
+Q +72f3e1d0eca2b9ebd7c4b4cdccc6d7a0173b2fdb204cb1aa207917aedab6098a
+Q +97666ec052ebaceab002874d7ca5c5e6883c3d04fb7d3992235a8c4c8d08407a
+R 733155be1814ed819345d16353d7d6cc
 U drh
-Z a8647c458acbccfab773c7d8d118b965
+Z 18340cdcfaea76204a33f87984917190
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-ac402cc551b2cbe3f8fbbc9c711a04942eab5eeb9d2f4a394e9370d2380427b5
+ab40e282465c989bf249453d7c6f60072a38b691f579411cdf9aad234b20f0f7

src/json.c

@@ -2269,10 +2269,11 @@ static u32 jsonTranslateBlobToText(
       jsonAppendChar(pOut, '[');
       j = i+n;
       iEnd = j+sz;
-      while( j<iEnd ){
+      while( j<iEnd && pOut->eErr==0 ){
         j = jsonTranslateBlobToText(pParse, j, pOut);
         jsonAppendChar(pOut, ',');
       }
+      if( j>iEnd ) pOut->eErr |= JSTRING_MALFORMED;
       if( sz>0 ) jsonStringTrimOneChar(pOut);
       jsonAppendChar(pOut, ']');
       break;
@@ -2282,11 +2283,11 @@ static u32 jsonTranslateBlobToText(
       jsonAppendChar(pOut, '{');
       j = i+n;
       iEnd = j+sz;
-      while( j<iEnd ){
+      while( j<iEnd && pOut->eErr==0 ){
         j = jsonTranslateBlobToText(pParse, j, pOut);
         jsonAppendChar(pOut, (x++ & 1) ? ',' : ':');
       }
-      if( x & 1 ) pOut->eErr |= JSTRING_MALFORMED;
+      if( (x & 1)!=0 || j>iEnd ) pOut->eErr |= JSTRING_MALFORMED;
       if( sz>0 ) jsonStringTrimOneChar(pOut);
       jsonAppendChar(pOut, '}');
       break;