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[79.177.39.148]) by smtp.gmail.com with ESMTPSA id h18sm98819wru.65.2021.02.02.14.56.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Feb 2021 14:56:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1612306604; 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=T83RMy2Gwje7YdzkCqa1OFUNA3HJsUqBur/2mRKIQ9Y=; b=dq6qi/mkVYMlOqkF/FnVX4kxP67m9vjZczkNVAhbofCqYkqIzVxNjUbE9VLqZ+SI+HhBFR +N7xU0Pv5wg2u6vnYeqAPiGwbe5s1PxYhtJHJE6zWLhg64sxrSsCcONCXRZskP5kL6EqbR dZW1WdraiuC9U9p//3wsbUOkIA2rqyA= X-MC-Unique: UxPtIBIUMMud2k_e5U79og-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition:content-transfer-encoding; bh=T83RMy2Gwje7YdzkCqa1OFUNA3HJsUqBur/2mRKIQ9Y=; b=r7ElEhsh6ZgWA0w4yQwwPnXCbuqhqAeu0FmanrU6QFpf/1MZ5rNiO/TiMmsQhLThj4 choWnvr5zl6OXzuCEpO4mk0L348PfzUQulLGa+DTWVxlkENAFmsHI63n3XRSAm/shHiv 9n70/BXj0sYYkQtIHJiZfKkpuyU1jcWsKaUWyWuyxQ4ymCyc/IyJtOrKgCcv45zbkCEj Sn5Sh9cQ/rVqnB6Mm85WXlhJJeVnX0JJ+1opdsHQ2qweURWxbTXG/LsWw2mc4wIIpnvE W7257EQhBsLVGP1a6GTp2clTz2fOaKKn/vZ/NHg+Q/M45NYS78v13ScMzEy1TkpxARQG n1vw== X-Gm-Message-State: AOAM5307Oh45zmqmfxEACkTShmCkh+oLld29D7Hf4vxGfkCLfmEqAffF zrGDEdpqjbNd8MTNRIJQbSm20RkDBd+muV/F9W6+I47jIRv61ACV3o43Ke1v1nP5kjxJJbSW0n7 Qy8SuJjejWshqm5G15y+tamkao5TSFJB0jGKB+pws0FyuCwlvSe+gYDTPA235 X-Received: by 2002:a05:600c:4f50:: with SMTP id m16mr183907wmq.175.1612306601352; Tue, 02 Feb 2021 14:56:41 -0800 (PST) X-Google-Smtp-Source: ABdhPJzgrV+Np+Em18IkpBcUF1mwz8EoIOEPtv/owu1J680rbAW0uGcwA+fBzjfdOUh4eVKhFcd19w== X-Received: by 2002:a05:600c:4f50:: with SMTP id m16mr183887wmq.175.1612306600967; Tue, 02 Feb 2021 14:56:40 -0800 (PST) Date: Tue, 2 Feb 2021 17:56:38 -0500 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Subject: [PATCH] acpi: use constants as strncpy limit Message-ID: <20210202225636.1607306-1-mst@redhat.com> MIME-Version: 1.0 X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Disposition: inline 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=216.205.24.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.386, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: Peter Maydell , qemu-arm@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) gcc is not smart enough to figure out length was validated before use as strncpy limit, resulting in this warning: inlined from =E2=80=98virt_set_oem_table_id=E2=80=99 at ../../hw/arm/virt.c= :2197:5: /usr/include/aarch64-linux-gnu/bits/string_fortified.h:106:10: error: =E2=80=98__builtin_strncpy=E2=80=99 specified bound depends on the length o= f the source argument [-Werror=3Dstringop-overflow=3D] Simplify things by using a constant limit instead. Fixes: 97fc5d507fca ("acpi: Permit OEM ID and OEM table ID fields to be cha= nged") Signed-off-by: Michael S. Tsirkin --- hw/arm/virt.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index ecb0e14816..f538194e32 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -2107,7 +2107,7 @@ static void virt_set_oem_id(Object *obj, const char *= value, Error **errp) return; } =20 - strncpy(vms->oem_id, value, len + 1); + strncpy(vms->oem_id, value, 6); } =20 static char *virt_get_oem_table_id(Object *obj, Error **errp) @@ -2128,7 +2128,7 @@ static void virt_set_oem_table_id(Object *obj, const = char *value, "User specified oem-table-id value is bigger than 8 byt= es in size"); return; } - strncpy(vms->oem_table_id, value, len + 1); + strncpy(vms->oem_table_id, value, 8); } =20 =20 --=20 MST