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[Bug c/55791] New: gcc fails to detect wrong type in sizeof in malloc
- From: "dcb314 at hotmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 22 Dec 2012 17:33:12 +0000
- Subject: [Bug c/55791] New: gcc fails to detect wrong type in sizeof in malloc
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55791
Bug #: 55791
Summary: gcc fails to detect wrong type in sizeof in malloc
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: dcb314@hotmail.com
Given the following code, culled from customer code,
# include <stdlib.h>
extern void g(char *);
void f()
{
char *p;
// wrong type in sizeof in malloc
p = (char *) malloc( 10 * sizeof( char *));
g(p);
}
gcc can't detect that the malloc line should be something closer to
p = (char *) malloc( 10 * sizeof( char));
i.e. the type in the sizeof expression must be the same as (or
at very least the same size as) the type of destination buffer.