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Take care to avoid a buffer over-read when adding a KEYINFO structure

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to the P4 parameter of an opcode.

FossilOrigin-Name: 937b931a7cdad6874638158ed6a9ab6356b0bd0c
This commit is contained in:
drh
2010-04-02 12:55:38 +00:00
parent c2a4bab462
commit a378c566d2
3 changed files with 11 additions and 11 deletions
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2
src/vdbeaux.c
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@@ -743,7 +743,7 @@ void sqlite3VdbeChangeP4(Vdbe *p, int addr, const char *zP4, int n){
pOp->p4.pKeyInfo = pKeyInfo;
if( pKeyInfo ){
u8 *aSortOrder;
memcpy((char*)pKeyInfo, zP4, nByte);
memcpy((char*)pKeyInfo, zP4, nByte - nField);
aSortOrder = pKeyInfo->aSortOrder;
if( aSortOrder ){
pKeyInfo->aSortOrder = (unsigned char*)&pKeyInfo->aColl[nField];