NetBSD Problem Report #53505
From root@whooppee.com Mon Aug 6 23:59:58 2018
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Message-Id: <20180806235955.C4E0430F2C2@speedy.whooppee.com>
Date: Tue, 7 Aug 2018 07:59:55 +0800 (+08)
From: paul@whooppee.com
Reply-To: paul@whooppee.com
To: gnats-bugs@NetBSD.org
Subject: multiple-evaluation issues in bitstring(3)
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>Number: 53505
>Category: lib
>Synopsis: multiple-evaluation issues in bitstring(3)
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: lib-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Tue Aug 07 00:00:00 +0000 2018
>Originator: Paul Goyette
>Release: NetBSD 8.99.22
>Organization:
+------------------+--------------------------+----------------------------+
| Paul Goyette | PGP Key fingerprint: | E-mail addresses: |
| (Retired) | FA29 0E3B 35AF E8AE 6651 | paul at whooppee dot com |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd dot org |
+------------------+--------------------------+----------------------------+
>Environment:
System: NetBSD speedy.whooppee.com 8.99.22 NetBSD 8.99.22 (SPEEDY 2018-07-25 07:42:52 UTC) #0: Wed Jul 25 13:38:00 UTC 2018 paul@speedy.whooppee.com:/build/netbsd-local/obj/amd64/sys/arch/amd64/compile/SPEEDY amd64
Architecture: x86_64
Machine: amd64
>Description:
The operations described in bitstring(3) and implemented as macros in
/usr/include/bitstring.h suffer from possible problems with multiple
evaluations of the macro arguments, particularly if the bit number
argument includes a ++ or -- !
>How-To-Repeat:
Inspect the code.
>Fix:
It was suggested on tech-userlevel@ to replace susceptible macros with
static inline functions, similarly to what is done in sys/event.h for
EV_SET
>Unformatted:
(Contact us)
$NetBSD: query-full-pr,v 1.43 2018/01/16 07:36:43 maya Exp $
$NetBSD: gnats_config.sh,v 1.9 2014/08/02 14:16:04 spz Exp $
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