From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <glibc-bugs-return-22155-listarch-glibc-bugs=sources.redhat.com@sourceware.org>
Received: (qmail 24578 invoked by alias); 18 Apr 2014 01:01:52 -0000
Mailing-List: contact glibc-bugs-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Id: <glibc-bugs.sourceware.org>
List-Subscribe: <mailto:glibc-bugs-subscribe@sourceware.org>
List-Post: <mailto:glibc-bugs@sourceware.org>
List-Help: <mailto:glibc-bugs-help@sourceware.org>, <http://sourceware.org/lists.html#faqs>
Sender: glibc-bugs-owner@sourceware.org
Received: (qmail 24532 invoked by uid 48); 18 Apr 2014 01:01:48 -0000
From: "bugdal at aerifal dot cx" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/16852] New: recvmmsg clobbers const argument
Date: Fri, 18 Apr 2014 01:01:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: glibc
X-Bugzilla-Component: libc
X-Bugzilla-Version: unspecified
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: bugdal at aerifal dot cx
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter cc
Message-ID: <bug-16852-131@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2014-04/txt/msg00106.txt.bz2

https://sourceware.org/bugzilla/show_bug.cgi?id=16852

            Bug ID: 16852
           Summary: recvmmsg clobbers const argument
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: bugdal at aerifal dot cx
                CC: drepper.fsp at gmail dot com

In sysdeps/unix/sysv/linux/recvmmsg.c, the const struct timespec *tmo argument
is passed directly to the Linux syscall recvmmsg which overwrites the
pointed-to struct with the remaining time. If this behavior is desired, the
argument needs to be changed to be a pointer-to-non-const, but the policy
elsewhere (in other analogous interfaces) seems to be to suppress the kernel
behavior by using a temp copy of the timeout to pass to the kernel.

-- 
You are receiving this mail because:
You are on the CC list for the bug.