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Ensure that a zero-blob does not cause in invocation of memcpy() with a

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zero length and a NULL source pointer.

FossilOrigin-Name: 35441eb5e1447e01f2031837a4ede705bce34f87be27912278cc730abce6cf05
This commit is contained in:
drh
2022-04-02 19:21:58 +00:00
parent 2c144b0f63
commit d13527daed
3 changed files with 14 additions and 10 deletions
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10
src/vdbe.c
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@@ -3412,14 +3412,18 @@ case OP_MakeRecord: {
}
}else if( serial_type<0x80 ){
*(zHdr++) = serial_type;
if( serial_type>=14 ){
if( serial_type>=14 && pRec->n>0 ){
assert( pRec->z!=0 );
memcpy(zPayload, pRec->z, pRec->n);
zPayload += pRec->n;
}
}else{
zHdr += sqlite3PutVarint(zHdr, serial_type);
memcpy(zPayload, pRec->z, pRec->n);
zPayload += pRec->n;
if( pRec->n ){
assert( pRec->z!=0 );
memcpy(zPayload, pRec->z, pRec->n);
zPayload += pRec->n;
}
}
if( pRec==pLast ) break;
pRec++;