From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 7814) id 0703B385800D; Mon, 11 Oct 2021 18:15:48 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 0703B385800D Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Fangrui Song To: glibc-cvs@sourceware.org Subject: [glibc/maskray/clang] resolv: Avoid GCC 12 false positive warning [BZ #28439]. X-Act-Checkin: glibc X-Git-Author: Martin Sebor X-Git-Refname: refs/heads/maskray/clang X-Git-Oldrev: 5d26d12f4ab59c67399c4d5ddcad91704fb737f9 X-Git-Newrev: eb73b87897798de981dbbf019aa957045d768adb Message-Id: <20211011181548.0703B385800D@sourceware.org> Date: Mon, 11 Oct 2021 18:15:48 +0000 (GMT) X-BeenThere: glibc-cvs@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Glibc-cvs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Oct 2021 18:15:48 -0000 https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=eb73b87897798de981dbbf019aa957045d768adb commit eb73b87897798de981dbbf019aa957045d768adb Author: Martin Sebor Date: Mon Oct 11 09:36:57 2021 -0600 resolv: Avoid GCC 12 false positive warning [BZ #28439]. Replace a call to sprintf with an equivalent pair of stpcpy/strcpy calls to avoid a GCC 12 -Wformat-overflow false positive due to recent optimizer improvements. Diff: --- resolv/res_query.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/resolv/res_query.c b/resolv/res_query.c index 75b0e5f2f7..5d0a68dc81 100644 --- a/resolv/res_query.c +++ b/resolv/res_query.c @@ -610,7 +610,9 @@ __res_context_querydomain (struct resolv_context *ctx, RES_SET_H_ERRNO(statp, NO_RECOVERY); return (-1); } - sprintf(nbuf, "%s.%s", name, domain); + char *p = __stpcpy (nbuf, name); + *p++ = '.'; + strcpy (p, domain); } return __res_context_query (ctx, longname, class, type, answer, anslen, answerp, answerp2, nanswerp2,