From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 961F2EB64DB for ; Wed, 14 Jun 2023 13:50:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245232AbjFNNuO (ORCPT ); Wed, 14 Jun 2023 09:50:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54502 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245203AbjFNNuL (ORCPT ); Wed, 14 Jun 2023 09:50:11 -0400 Received: from mail-il1-x133.google.com (mail-il1-x133.google.com [IPv6:2607:f8b0:4864:20::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 34E691FF7; Wed, 14 Jun 2023 06:50:00 -0700 (PDT) Received: by mail-il1-x133.google.com with SMTP id e9e14a558f8ab-340a05c22deso2187135ab.1; Wed, 14 Jun 2023 06:50:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1686750599; x=1689342599; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=ZEPuphakaNp1fYcyZ4pObojDdVaUBwTgM8okY278g5E=; b=ipsgnUCS9NMIbr5fKQnk6kUv67E3x/wY8Rq+aGR0dr6qp/ctIpczO2KxLo1i9Cez3l y8qlys4Sx5KpiBn9Nnjg44K0M0X/fQ3mvM5r9ErMiOAADRI5WwBa5rpflBHNJ87ta5qN Vj33y4B2iKVL/rP7Wi/cm2uV+G8nxboYFqLXVv1CuqLQ/MJq23RcFH3XD7OUkDBvQJCc Wt/8MaUcl1t5faWXnbe3x198W8AabOJRZ0a+UaFI+MjqVfGYlZceaEqLt/FpCCw0q+co /m0OOa1RD0pmujC8dngUrmQcYCRaL/5JGUqS9jRI14oY9K361mymCboKbWJACZHWfH02 cXWA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686750599; x=1689342599; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=ZEPuphakaNp1fYcyZ4pObojDdVaUBwTgM8okY278g5E=; b=foYcaPNq4OHEIJ7vwPJaMP7oIgoOOR2VBZiw8NERWdIhAK476WqfF6CUXexdpjjBIJ B/mMs+6y2Tf96NCzZnuEfxLDNnvo2wM6jSexljXxNg0sxy3rkK6wtEi0nHtl6xx5C0e5 0MJegbbFAxxGYbbeRlRWDrsiZAltPs2pkaQzXbTgZ9kWe2pA+kWsEmyIMmKSwNAsxG8a Hm2nr7DMzFCmGt0qJbwUNfoQtiNQdHRawxLcJUrY4eDAdeqNx1/WnGGymswGQJgXNMFE mPhbv+Aj5cRdV8xf7JDBvYlC3yfIiDjdUGg/Xl0ux/uWju0MCoD6Vx4YziH+/Qaqky0L h3Ng== X-Gm-Message-State: AC+VfDwud9kqottb5ItIQTftJp0p7DEsGXnq2+jY1ECHIP0R6kawTJL4 gL1QnPi1q23lyMIxy0mhcf0= X-Google-Smtp-Source: ACHHUZ4Q+vvd86epl/4PhLMQWi6vLCuv0c4ale/GTY/nnvGPX8Z/2yHYNXQj/hF9L+IuVhfQH7e0pg== X-Received: by 2002:a92:cacd:0:b0:33a:5bb5:f8f6 with SMTP id m13-20020a92cacd000000b0033a5bb5f8f6mr11581580ilq.18.1686750599414; Wed, 14 Jun 2023 06:49:59 -0700 (PDT) Received: from azeems-kspp.c.googlers.com.com (54.70.188.35.bc.googleusercontent.com. [35.188.70.54]) by smtp.gmail.com with ESMTPSA id a26-20020a056638019a00b004182f88c368sm5072190jaq.67.2023.06.14.06.49.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Jun 2023 06:49:59 -0700 (PDT) From: Azeem Shaikh To: Kalle Valo Cc: linux-hardening@vger.kernel.org, Azeem Shaikh , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org, Johannes Berg Subject: [PATCH v3] wifi: cfg80211: replace strlcpy() with strscpy() Date: Wed, 14 Jun 2023 13:49:56 +0000 Message-ID: <20230614134956.2109252-1-azeemshaikh38@gmail.com> X-Mailer: git-send-email 2.41.0.162.gfafddb0af9-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-hardening@vger.kernel.org strlcpy() reads the entire source buffer first. This read may exceed the destination size limit. This is both inefficient and can lead to linear read overflows if a source string is not NUL-terminated [1]. In an effort to remove strlcpy() completely [2], replace strlcpy() here with strscpy(). Direct replacement is safe here since WIPHY_ASSIGN is only used by TRACE macros and the return values are ignored. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89 Signed-off-by: Azeem Shaikh --- v1: https://lore.kernel.org/all/20230612232301.2572316-1-azeemshaikh38@gmail.com/ v2: https://lore.kernel.org/all/20230614134552.2108471-1-azeemshaikh38@gmail.com/ Changes from v1 and v2 - updated patch title. net/wireless/trace.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/wireless/trace.h b/net/wireless/trace.h index 716a1fa70069..a00da3ebfed5 100644 --- a/net/wireless/trace.h +++ b/net/wireless/trace.h @@ -22,7 +22,7 @@ #define MAXNAME 32 #define WIPHY_ENTRY __array(char, wiphy_name, 32) -#define WIPHY_ASSIGN strlcpy(__entry->wiphy_name, wiphy_name(wiphy), MAXNAME) +#define WIPHY_ASSIGN strscpy(__entry->wiphy_name, wiphy_name(wiphy), MAXNAME) #define WIPHY_PR_FMT "%s" #define WIPHY_PR_ARG __entry->wiphy_name -- 2.41.0.162.gfafddb0af9-goog