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Avoid decrementing a pointer off the front end of the buffer in OP_MakeRecord.

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FossilOrigin-Name: 153135bfb3b8f7c407ccf36571e2d4d5afe28ea3
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drh
2016-04-07 14:16:16 +00:00
parent be5000d6bf
commit 45c3c66385
3 changed files with 10 additions and 8 deletions
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4
src/vdbe.c
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@@ -2755,7 +2755,9 @@ case OP_MakeRecord: {
testcase( serial_type==127 );
testcase( serial_type==128 );
nHdr += serial_type<=127 ? 1 : sqlite3VarintLen(serial_type);
}while( (--pRec)>=pData0 );
if( pRec==pData0 ) break;
pRec--;
}while(1);
/* EVIDENCE-OF: R-22564-11647 The header begins with a single varint
** which determines the total number of bytes in the header. The varint