From patchwork Wed Apr 10 02:31:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kees Cook X-Patchwork-Id: 788943 Received: from mail-pg1-f180.google.com (mail-pg1-f180.google.com [209.85.215.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 872EF8BF0 for ; Wed, 10 Apr 2024 02:31:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.180 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712716319; cv=none; b=bOCTBvxZYe5NvxjelSLSYQ9DHLs1OwhSnRZj3XarXwVQu63Zeb/pgOt3PEgmn1yf+Ox7ZQohMifB7MYlE4qHJEzFoP+nWFg7KGhMGJCJPUOMnx3UlxIYT9kFklnM0KfV4RRwMuEwpTS7WlYr81mnajW1OV2WMk/Phg91dfOu+tI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712716319; c=relaxed/simple; bh=U04NgByTSLz3ezEZdZ9fh7Nk8N6aKk3aFVSqTRfRHjg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Gaco+hbvSJ0BKuE5lS76R83AgRQMsqoMxDOr8AqiT1+CeIIbopr4k/qHgIqFIVNq2O/lkmxYArTbyJP1zNKReuyEHYDTwVQO6o6XPFCstPPV83Y/47TTODQHmbGysOWj0g/mwCWxk/zdlwVqdKyDP6DESF2Iy4xBpxI9lAYxY58= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=RhBMpdHB; arc=none smtp.client-ip=209.85.215.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="RhBMpdHB" Received: by mail-pg1-f180.google.com with SMTP id 41be03b00d2f7-5cf2d73a183so4922391a12.1 for ; Tue, 09 Apr 2024 19:31:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1712716317; x=1713321117; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=HlPZnmbgI1osTC93HPkRH848zgm3O+BOnZN3oq69oh0=; b=RhBMpdHBSMCgij83Cs2UFmtMNeQloXFhW7aAz58ETUvP416Mn4xplkZzzpgF5ndy2O zBTm8ciEzPQ/AKq4SCyQuW8ob+mD9MB6Fj7pWwEuHeV4VvcfvLTZCbwCbxmpfl6CpWND 9NrPmpFUSDoHiBJVcFv822FYVxARwa9avku2c= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712716317; x=1713321117; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=HlPZnmbgI1osTC93HPkRH848zgm3O+BOnZN3oq69oh0=; b=B42WxxifYg9XAHX6RkmV8TiMJEEICaZGEjLVuLu2BHG2KMXO/9ZZDwDArbpe7K7Rnv C2nFMRREywsshtlpb8VjVDwf3WdMusEOexdAu6AjD96KL0Mg+A6iMCYdiQ/xfp2/pDkj I2FX1DzK8WF9hkNKJOH+xkp1jvaiS1Q0ciVK2XYMcXuFxTPbSVufjjNcrHtWwtK9FuIG IJCh4j6he3Ddqxtce9xR7qZ7O6HRQ1L4tgl1GtSueg0Rfkj5l3P6G5izRSMwH5clSVKj OD1mCNn0VC1F2mHZrGbXPtoelNmx2N9k1jBq1eWl+oNsqGG6reMHCOsWY4w0n/AX+vyt Q0kQ== X-Forwarded-Encrypted: i=1; AJvYcCWrK+/DTl6ppWgQV3kMIkbwJ03B8QJhQ62zL+qHrMP2x0zWSKdnbFztYRlIYWuzNOmikDZclgIZdxiEAxX1AM2byQJ/dAa1XxhWvQ== X-Gm-Message-State: AOJu0YxGfkeDBt+M4YkQqpIh5eURV1Nbwny9yi7G5XADqDqgyJxmuujI 6t8cMbFPlGDOp5pMYLzHC6yq+YDunA9vJrf11zxO5TqPH1lH14mMPZROWF/bew== X-Google-Smtp-Source: AGHT+IHfu78WL0uAZuDeq/rlPxqp3NVD2u7O2q3IqroeTJfRqm4Rp6+M6UwBBFdMN6WcRcmEZ3JqtA== X-Received: by 2002:a17:90a:d918:b0:29b:fb23:863e with SMTP id c24-20020a17090ad91800b0029bfb23863emr1952806pjv.17.1712716316789; Tue, 09 Apr 2024 19:31:56 -0700 (PDT) Received: from www.outflux.net ([198.0.35.241]) by smtp.gmail.com with ESMTPSA id y15-20020a17090a1f4f00b002a2b06ce909sm377923pjy.17.2024.04.09.19.31.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Apr 2024 19:31:56 -0700 (PDT) From: Kees Cook To: "Martin K . Petersen" Cc: Kees Cook , Justin Stitt , Sathya Prakash , Sreekanth Reddy , Suganath Prabu Subramani , "James E.J. Bottomley" , MPT-FusionLinux.pdl@broadcom.com, linux-scsi@vger.kernel.org, Charles Bertsch , Bart Van Assche , Andy Shevchenko , Kashyap Desai , Sumit Saxena , Nilesh Javali , Andrew Morton , Himanshu Madhani , linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, mpi3mr-linuxdrv.pdl@broadcom.com, GR-QLogic-Storage-Upstream@marvell.com Subject: [PATCH 3/5] scsi: mpt3sas: Avoid possible run-time warning with long manufacturer strings Date: Tue, 9 Apr 2024 19:31:52 -0700 Message-Id: <20240410023155.2100422-3-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240410021833.work.750-kees@kernel.org> References: <20240410021833.work.750-kees@kernel.org> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3122; i=keescook@chromium.org; h=from:subject; bh=U04NgByTSLz3ezEZdZ9fh7Nk8N6aKk3aFVSqTRfRHjg=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBmFfoaalwyvrfJyK8QIq7jmpi8j+mOqTzMVE7Um sEjOcCl/WSJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZhX6GgAKCRCJcvTf3G3A JmufD/9ZRH3yvaQcFC4/t2XLUlydOVs8JOSZfUGQuJvfCw04zGXkb1ifJ2XBR1NnzlI8BmHEzKa GXMKW0wDvIaC6h9gSbRqVZUIr6BM5BNfW6mDoywzySg0bfALOE7RA0lEYN4SNMRIURimdHR/+x2 RKtaoqzrJRBzhQxoVBmUvM/K/HIoJrGfKjVvq9vz9asbgVPFlUKh2vtmtlF2TGM5dfJ0RvJBlXn RGfNjoCmh6HQieSmaroLtXhKPs301s7PjJzIC4KvxBro1mMf2dksl5wKXtuJGlfo05gwqaNvPVK tBG4Nb71gynpv7I9pzqPi/rviXyauLY5A8firvTXxSoYPbZrrxXDzbtbEpiVsD/7qb8H4lmKnEA PLNDtqVKSZmeDn9tJ0MZEKlP2HC6DcAuCUoKoahUv5d6vcAEc2cJ/rE48qirb9xpivUo+zhRLK3 JymNPRKUukbz45C85+u7NjdSAytO0HLyb2QZa9aVX3epJ25QZwwRNbVroRe/lq8rIYelMGoUR8g d6RpVTr/gVw+h/BYTvSC4kBwIHFEmtBKkeTqvDLc/YFjsdGzJit3yzVjRKTaucTgNn2kgyOPWf8 eoMNopJ9h7NfqQd9yx5LH/58wQl367q0F9kbBZJGKwhEKY1HDeo8Afm+ZyXX9j1Uf77yKOoYixP r8BS5P3p6k2SJtg== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 The prior strscpy() replacement of strncpy() here expected the manufacture_reply strings to be NUL-terminated, but it is possible they are not, as the code pattern here shows, e.g., edev->vendor_id being exactly 1 character larger than manufacture_reply->vendor_id, and the replaced strncpy() was copying only up to the size of the source character array. Replace this with memtostr(), which is the unambiguous way to convert a maybe not-NUL-terminated character array into a NUL-terminated string. Fixes: b7e9712a02e8 ("scsi: mpt3sas: Replace deprecated strncpy() with strscpy()") Signed-off-by: Kees Cook --- Cc: Justin Stitt Cc: Sathya Prakash Cc: Sreekanth Reddy Cc: Suganath Prabu Subramani Cc: "James E.J. Bottomley" Cc: "Martin K. Petersen" Cc: MPT-FusionLinux.pdl@broadcom.com Cc: linux-scsi@vger.kernel.org --- drivers/scsi/mpt3sas/mpt3sas_base.c | 2 +- drivers/scsi/mpt3sas/mpt3sas_transport.c | 14 +++++--------- 2 files changed, 6 insertions(+), 10 deletions(-) diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index 258647fc6bdd..1320e06727df 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -4774,7 +4774,7 @@ _base_display_ioc_capabilities(struct MPT3SAS_ADAPTER *ioc) char desc[17] = {0}; u32 iounit_pg1_flags; - strscpy(desc, ioc->manu_pg0.ChipName, sizeof(desc)); + memtostr(desc, ioc->manu_pg0.ChipName); ioc_info(ioc, "%s: FWVersion(%02d.%02d.%02d.%02d), ChipRevision(0x%02x)\n", desc, (ioc->facts.FWVersion.Word & 0xFF000000) >> 24, diff --git a/drivers/scsi/mpt3sas/mpt3sas_transport.c b/drivers/scsi/mpt3sas/mpt3sas_transport.c index 76f9a9177198..d84413b77d84 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_transport.c +++ b/drivers/scsi/mpt3sas/mpt3sas_transport.c @@ -458,17 +458,13 @@ _transport_expander_report_manufacture(struct MPT3SAS_ADAPTER *ioc, goto out; manufacture_reply = data_out + sizeof(struct rep_manu_request); - strscpy(edev->vendor_id, manufacture_reply->vendor_id, - sizeof(edev->vendor_id)); - strscpy(edev->product_id, manufacture_reply->product_id, - sizeof(edev->product_id)); - strscpy(edev->product_rev, manufacture_reply->product_rev, - sizeof(edev->product_rev)); + memtostr(edev->vendor_id, manufacture_reply->vendor_id); + memtostr(edev->product_id, manufacture_reply->product_id); + memtostr(edev->product_rev, manufacture_reply->product_rev); edev->level = manufacture_reply->sas_format & 1; if (edev->level) { - strscpy(edev->component_vendor_id, - manufacture_reply->component_vendor_id, - sizeof(edev->component_vendor_id)); + memtostr(edev->component_vendor_id, + manufacture_reply->component_vendor_id); tmp = (u8 *)&manufacture_reply->component_id; edev->component_id = tmp[0] << 8 | tmp[1]; edev->component_revision_id =