From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20257 invoked by alias); 29 Oct 2011 21:17:48 -0000 Received: (qmail 20249 invoked by uid 22791); 29 Oct 2011 21:17:47 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO sourceware.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sat, 29 Oct 2011 21:17:35 +0000 From: "drepper.fsp at gmail dot com" To: glibc-bugs@sources.redhat.com Subject: [Bug libc/9914] possible signed integer overflow in libio/iogetdelim.c Date: Sat, 29 Oct 2011 21:17:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: glibc X-Bugzilla-Component: libc X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: drepper.fsp at gmail dot com X-Bugzilla-Status: RESOLVED X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: drepper.fsp at gmail dot com X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact glibc-bugs-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: glibc-bugs-owner@sourceware.org X-SW-Source: 2011-10/txt/msg00197.txt.bz2 http://sourceware.org/bugzilla/show_bug.cgi?id=9914 --- Comment #4 from Ulrich Drepper 2011-10-29 21:17:08 UTC --- (In reply to comment #3) > If it is testing whether cur_len + len + 1 overflowed from positive into > negative, then it is undefined behavior, because all the additions are > performed in signed _IO_ssize_t. The compiler cannot know that the variables are not negative. Therefore the test has to be emitted. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.