Bug 351013

Summary:	sci-libs/grib_api _FORTIFY_SOURCE indicates presence of overflow
Product:	Gentoo Linux	Reporter:	Diego Elio Pettenò (RETIRED) <flameeyes>
Component:	Current packages	Assignee:	Gentoo Science Related Packages <sci>
Status:	RESOLVED FIXED
Severity:	major	CC:	hardened
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Bug Depends on:
Bug Blocks:	259417
Attachments:	Build log

Description Diego Elio Pettenò (RETIRED) gentoo-dev

2011-01-07 18:18:03 UTC

You're receiving this bug because the package in Summary has produced _FORTIFY_SOURCE related warnings indicating the presence of a sure overflow in a static buffer.

Even though this is not always an indication of a security problem it might even be. So please check this out ASAP.

By the way, _FORTIFY_SOURCE is disabled when you disable optimisation, so don't try finding out the cause using -O0.

Thanks,
Your friendly neighborhood tinderboxer

Comment 1 Diego Elio Pettenò (RETIRED) gentoo-dev

2011-01-07 18:18:24 UTC

Created attachment 259195 [details]
Build log

Comment 2 Sébastien Fabbro (RETIRED) gentoo-dev

2011-01-08 22:48:15 UTC

not reproducible on amd64.

Comment 3 Kacper Kowalik (Xarthisius) (RETIRED) gentoo-dev

2011-01-08 23:14:11 UTC

(In reply to comment #2)
> not reproducible on amd64.
yup, offending code:

unsigned long lval;
unsigned char s[8]={0,};
memcpy(&lval,s,8);

on amd64 lval has 8 bytes, on x86 only 4.

Comment 4 Justin Lecher (RETIRED) gentoo-dev

2011-04-25 09:36:50 UTC

+  25 Apr 2011; Justin Lecher <jlec@gentoo.org> grib_api-1.9.5-r1.ebuild,
+  +files/grib_api-1.9.5-32bit.patch:
+  _FORTIFY_SOURCE indicates presence of overflow Fix, #351013
+