From patchwork Wed May 4 01:44:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kees Cook X-Patchwork-Id: 569338 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 E39B8C433FE for ; Wed, 4 May 2022 01:52:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343553AbiEDBxi (ORCPT ); Tue, 3 May 2022 21:53:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56774 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245582AbiEDBw1 (ORCPT ); Tue, 3 May 2022 21:52:27 -0400 Received: from mail-pl1-x62e.google.com (mail-pl1-x62e.google.com [IPv6:2607:f8b0:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E63F741318 for ; Tue, 3 May 2022 18:47:39 -0700 (PDT) Received: by mail-pl1-x62e.google.com with SMTP id j14so168939plx.3 for ; Tue, 03 May 2022 18:47:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=szeqM9M0yrMyJS9vcuYR4tTzvEASeBs+sh1JgS4qPAo=; b=SNMym2HDPaFxMLeJFcK68nelvSK8kE0Z3iij6ppE4Nnk5PkLPyihqCWqJWEyxTK+Ad Wlo0fMMZpa7cEJ44ZnUWiYYlbNhSmn3I+2rzPJ3v+90je6UlKRw4Aqz10rVm1pygvoeV KVh5PeFOgavCCRafhGFy8OhJb2FMOsRW4OkVk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=szeqM9M0yrMyJS9vcuYR4tTzvEASeBs+sh1JgS4qPAo=; b=FFjvBx4I++ow3zYTEM4FqPyP5pCcfEpU0lmWwfQU2ctXdllOMnrLxMNcg2LJARpMsW nGlpu6Bl7mhaa1KZl/6EBb7rWCuADSNzVyOmSr17ymEAV/Ra3sYTcxUoU4dfdLYbRfq2 ePb8cV8/DmRMJoHAuMdt1eaxEpAqZZdJLGx4BoSYjf0L+82+aMmrLTQrflhe/A6cIsoQ vyiLLfgnzL29y/qQCmEXC4EdOuBNitn/6nS3WxWv0l4vdIG6oPnuyqJG4AarSCvE/EOH d5jpUm07tXIgUYOyYEzEe9nZ7KTxkiLhaF2Zl+dS41YKbrmsDa5lP/lsqDHNFZlzQnEa dttg== X-Gm-Message-State: AOAM53182SMn74Sb4nIAiYoU0OtGvQKZ4J83ypzfU0K44poNBAS6v2MI vPG6IYW6Qzs1tbtuRoHOaJ7USg== X-Google-Smtp-Source: ABdhPJyLljkiQcnpMeBAkbABtu5tfsx1RQAtFvxNI6eRYUdVP5PUSieP/fvUB77typ12OdIz4mCUCg== X-Received: by 2002:a17:902:c952:b0:15e:9e3d:8e16 with SMTP id i18-20020a170902c95200b0015e9e3d8e16mr14572083pla.51.1651628858230; Tue, 03 May 2022 18:47:38 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id k21-20020aa792d5000000b0050dc7628159sm6928738pfa.51.2022.05.03.18.47.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 May 2022 18:47:37 -0700 (PDT) From: Kees Cook To: "Gustavo A . R . Silva" Cc: Kees Cook , Arend van Spriel , Franky Lin , Hante Meuleman , Kalle Valo , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-wireless@vger.kernel.org, brcm80211-dev-list.pdl@broadcom.com, SHA-cyfmac-dev-list@infineon.com, netdev@vger.kernel.org, Alexei Starovoitov , alsa-devel@alsa-project.org, Al Viro , Andrew Gabbasov , Andrew Morton , Andy Gross , Andy Lavr , Baowen Zheng , Bjorn Andersson , Boris Ostrovsky , Bradley Grove , Christian Brauner , =?utf-8?q?Christian_G=C3=B6ttsche?= , Christian Lamparter , Chris Zankel , Cong Wang , Daniel Axtens , Daniel Vetter , Dan Williams , David Gow , David Howells , Dennis Dalessandro , devicetree@vger.kernel.org, Dexuan Cui , Dmitry Kasatkin , Eli Cohen , Eric Paris , Eugeniu Rosca , Felipe Balbi , Francis Laniel , Frank Rowand , Greg Kroah-Hartman , Gregory Greenman , Guenter Roeck , Haiyang Zhang , Herbert Xu , Hulk Robot , "James E.J. Bottomley" , James Morris , Jarkko Sakkinen , Jaroslav Kysela , Jason Gunthorpe , Jens Axboe , Johan Hedberg , Johannes Berg , Johannes Berg , John Keeping , Juergen Gross , Keith Packard , keyrings@vger.kernel.org, kunit-dev@googlegroups.com, Kuniyuki Iwashima , "K. Y. Srinivasan" , Lars-Peter Clausen , Lee Jones , Leon Romanovsky , Liam Girdwood , linux1394-devel@lists.sourceforge.net, linux-afs@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-hardening@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-integrity@vger.kernel.org, linux-rdma@vger.kernel.org, linux-scsi@vger.kernel.org, linux-security-module@vger.kernel.org, linux-usb@vger.kernel.org, linux-xtensa@linux-xtensa.org, llvm@lists.linux.dev, Loic Poulain , Louis Peens , Luca Coelho , Luiz Augusto von Dentz , Marc Dionne , Marcel Holtmann , Mark Brown , "Martin K. Petersen" , Max Filippov , Mimi Zohar , Muchun Song , Nathan Chancellor , Nick Desaulniers , =?utf-8?q?Nuno_S=C3=A1?= , Paul Moore , Rich Felker , Rob Herring , Russell King , selinux@vger.kernel.org, "Serge E. Hallyn" , Simon Horman , Stefano Stabellini , Stefan Richter , Steffen Klassert , Stephen Hemminger , Stephen Smalley , Tadeusz Struk , Takashi Iwai , Tom Rix , Udipto Goswami , Vincenzo Frascino , wcn36xx@lists.infradead.org, Wei Liu , xen-devel@lists.xenproject.org, Xiu Jianfeng , Yang Yingliang Subject: [PATCH 05/32] brcmfmac: Use mem_to_flex_dup() with struct brcmf_fweh_queue_item Date: Tue, 3 May 2022 18:44:14 -0700 Message-Id: <20220504014440.3697851-6-keescook@chromium.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220504014440.3697851-1-keescook@chromium.org> References: <20220504014440.3697851-1-keescook@chromium.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2425; h=from:subject; bh=LUlPP0dMftItb3yi/Nge8ZTfomS6k0b5Ud+psHgt9Uk=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBicdqBCnVywLtiCXwEUYb08oAOpk1h97YdS8IXrTwN m34sdVuJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYnHagQAKCRCJcvTf3G3AJokcD/ 944yjyiL4MM2Llyg3BhqwjaPE/1VNwGW9grsHKNIASpW8lInBdW90HjydT+vZ0wCt1VpknFi2upnQI XFtVoH0BT1G9pp4WHMjMMAaSqS3XB0bqdYs4DVvPzTKh5kGr5jX6k9+GTSve/itnWwnYDdM80IlUNt S0IhtkWMACqLlgyqGlt11fTu2Zpj0mRgIVFYh1FPaQRGj+skxj5+tzJqnIxOvBBPtzMq5leG8tzvRp gGF1ADH/0BhWsidIuY5CltVSgionGZ0at33CGy6Yb686fc3WZxfkwUqwKd4kWy0/RHSdYt4O0S9KnY r3h5ztCJtoyE+LsOyQfAjweyIO2LhMxNdieb0lZcJ/4W95rILXttIhcQ8iyf4yAsY69UgQuHPKDcAf nBH2PYzGNfEsEHmEr7bOtF2WG7xXUZXn6gi1luh2tpxiaDAkWSbwC0/Hg4An1+r4RDKB8TaO47Qgsp PG9QvJ1Ej3BAp6hSui4/P+qsMcNSEBBM0dZS2Ro11mi+jDDxK5En0Xgd/el0xn+qwqq+NFNlC0jKcW /QhhJ9GSxPsZzAT51pgi/Q//ZlDNoXI6Xmoho22SXd2se2PmaeWQDnuPK8bWnerpItxcrS1KP5jR9H przw+F/g76E2CP74njdcHJE58D4/zsqYKWbbLWi2QfpgIWTEZ+hV+/A44Ihw== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org As part of the work to perform bounds checking on all memcpy() uses, replace the open-coded a deserialization of bytes out of memory into a trailing flexible array by using a flex_array.h helper to perform the allocation, bounds checking, and copying. Cc: Arend van Spriel Cc: Franky Lin Cc: Hante Meuleman Cc: Kalle Valo Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: linux-wireless@vger.kernel.org Cc: brcm80211-dev-list.pdl@broadcom.com Cc: SHA-cyfmac-dev-list@infineon.com Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook --- .../net/wireless/broadcom/brcm80211/brcmfmac/fweh.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c index bc3f4e4edcdf..bea798ca6466 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c @@ -32,8 +32,8 @@ struct brcmf_fweh_queue_item { u8 ifidx; u8 ifaddr[ETH_ALEN]; struct brcmf_event_msg_be emsg; - u32 datalen; - u8 data[]; + DECLARE_FLEX_ARRAY_ELEMENTS_COUNT(u32, datalen); + DECLARE_FLEX_ARRAY_ELEMENTS(u8, data); }; /* @@ -395,7 +395,7 @@ void brcmf_fweh_process_event(struct brcmf_pub *drvr, { enum brcmf_fweh_event_code code; struct brcmf_fweh_info *fweh = &drvr->fweh; - struct brcmf_fweh_queue_item *event; + struct brcmf_fweh_queue_item *event = NULL; void *data; u32 datalen; @@ -414,8 +414,7 @@ void brcmf_fweh_process_event(struct brcmf_pub *drvr, datalen + sizeof(*event_packet) > packet_len) return; - event = kzalloc(sizeof(*event) + datalen, gfp); - if (!event) + if (mem_to_flex_dup(&event, data, datalen, gfp)) return; event->code = code; @@ -423,8 +422,6 @@ void brcmf_fweh_process_event(struct brcmf_pub *drvr, /* use memcpy to get aligned event message */ memcpy(&event->emsg, &event_packet->msg, sizeof(event->emsg)); - memcpy(event->data, data, datalen); - event->datalen = datalen; memcpy(event->ifaddr, event_packet->eth.h_dest, ETH_ALEN); brcmf_fweh_queue_event(fweh, event);