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Changes to avoid undefined behavior in memset() and memcpy() and in the

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comparisons of pointers from different allocations.  All problems are found
by analysis tools - none have been seen in the wild.

FossilOrigin-Name: 901d0b8f3b72e96ffa8e9436993a12980f5ebd51
This commit is contained in:
drh
2015-12-08 16:58:45 +00:00
parent ea06a271a4
commit 72ea29d7ae
5 changed files with 20 additions and 11 deletions
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src/vdbeaux.c
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@@ -3237,7 +3237,7 @@ u32 sqlite3VdbeSerialPut(u8 *buf, Mem *pMem, u32 serial_type){
assert( pMem->n + ((pMem->flags & MEM_Zero)?pMem->u.nZero:0)
== (int)sqlite3VdbeSerialTypeLen(serial_type) );
len = pMem->n;
memcpy(buf, pMem->z, len);
if( len>0 ) memcpy(buf, pMem->z, len);
return len;
}