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Thu, 17 Sep 2020 03:43:57 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-280-Ec0LdK0yNAmzzi1rM0_Rgg-1; Thu, 17 Sep 2020 03:43:53 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 86C52805EE2; Thu, 17 Sep 2020 07:43:52 +0000 (UTC) Received: from thuth.com (ovpn-113-38.ams2.redhat.com [10.36.113.38]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8847878805; Thu, 17 Sep 2020 07:43:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600328635; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=GwRM6QfSQQ2f/WvLuklLyFy6L+D8x/mCtxQFpC7zjKE=; b=d+lvZoWCGP1tlxVqnMuBk7Kiv4tgkhNEZ7vxyDNUKn1fsrLpNLsAOKmyG7K8Gtdz+dRHjJ 0rjJf/Ftta0oFbLbHhueV+/KbwkOY8VUlb4btSW3Mm2WBdMHvsPVBjPJEQhTYKmYT4OUWR dDrWVoLRWUZSyVeUiRedj/T3qEwQfmI= X-MC-Unique: Ec0LdK0yNAmzzi1rM0_Rgg-1 From: Thomas Huth To: Juan Quintela , "Dr. David Alan Gilbert" , qemu-devel@nongnu.org Subject: [PATCH v2] migration: Silence compiler warning in global_state_store_running() Date: Thu, 17 Sep 2020 09:43:44 +0200 Message-Id: <20200917074344.168785-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=thuth@redhat.com X-Mimecast-Spam-Score: 0.003 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=205.139.110.120; envelope-from=thuth@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/17 02:30:14 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -50 X-Spam_score: -5.1 X-Spam_bar: ----- X-Spam_report: (-5.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-2.999, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-trivial@nongnu.org, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Paolo Bonzini Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) GCC 9.3.0 on Ubuntu complains: In file included from /usr/include/string.h:495, from /home/travis/build/huth/qemu/include/qemu/osdep.h:87, from ../migration/global_state.c:13: In function =E2=80=98strncpy=E2=80=99, inlined from =E2=80=98global_state_store_running=E2=80=99 at ../migrati= on/global_state.c:47:5: /usr/include/x86_64-linux-gnu/bits/string_fortified.h:106:10: error: =E2=80=98__builtin_strncpy=E2=80=99 specified bound 100 equals destination= size [-Werror=3Dstringop-truncation] 106 | return __builtin___strncpy_chk (__dest, __src, __len, __bos (__de= st)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~= ~~~~ ... but we apparently really want to do a strncpy here - the size is already checked with the assert() statement right in front of it. To silence the warning, simply replace it with our strpadcpy() function. Signed-off-by: Thomas Huth --- v2: Use strpadcpy instead of QEMU_NONSTRING (and yes, this time it seems to really silence the compiler warning :-)) migration/global_state.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/migration/global_state.c b/migration/global_state.c index 25311479a4..a33947ca32 100644 --- a/migration/global_state.c +++ b/migration/global_state.c @@ -44,8 +44,8 @@ void global_state_store_running(void) { const char *state =3D RunState_str(RUN_STATE_RUNNING); assert(strlen(state) < sizeof(global_state.runstate)); - strncpy((char *)global_state.runstate, - state, sizeof(global_state.runstate)); + strpadcpy((char *)global_state.runstate, sizeof(global_state.runstate), + state, '\0'); } =20 bool global_state_received(void) --=20 2.18.2