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author | Justin M. Forbes <jforbes@fedoraproject.org> | 2019-08-29 07:11:04 -0500 |
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committer | Justin M. Forbes <jforbes@fedoraproject.org> | 2019-08-29 07:11:04 -0500 |
commit | 206ff7fd1400a2c1764aeac4895dbce5d382077a (patch) | |
tree | 65cbf3a35720974f914be07934500052f5342b07 /fix-a-double-free-bug-in-rsi_91x_deinit.patch | |
parent | 7a3465ebc10f7822d4724b6ada7f3415968b515b (diff) | |
download | kernel-206ff7fd1400a2c1764aeac4895dbce5d382077a.tar.gz kernel-206ff7fd1400a2c1764aeac4895dbce5d382077a.tar.xz kernel-206ff7fd1400a2c1764aeac4895dbce5d382077a.zip |
Linux v5.2.11
Diffstat (limited to 'fix-a-double-free-bug-in-rsi_91x_deinit.patch')
-rw-r--r-- | fix-a-double-free-bug-in-rsi_91x_deinit.patch | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/fix-a-double-free-bug-in-rsi_91x_deinit.patch b/fix-a-double-free-bug-in-rsi_91x_deinit.patch new file mode 100644 index 000000000..331817bda --- /dev/null +++ b/fix-a-double-free-bug-in-rsi_91x_deinit.patch @@ -0,0 +1,121 @@ +From mboxrd@z Thu Jan 1 00:00:00 1970 +Return-Path: <SRS0=+RQC=WP=vger.kernel.org=linux-kernel-owner@kernel.org> +X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on + aws-us-west-2-korg-lkml-1.web.codeaurora.org +X-Spam-Level: +X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, + DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, + HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, + SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no + version=3.4.0 +Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) + by smtp.lore.kernel.org (Postfix) with ESMTP id EBD3AC3A5A0 + for <linux-kernel@archiver.kernel.org>; Mon, 19 Aug 2019 22:02:45 +0000 (UTC) +Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) + by mail.kernel.org (Postfix) with ESMTP id BCC05214DA + for <linux-kernel@archiver.kernel.org>; Mon, 19 Aug 2019 22:02:45 +0000 (UTC) +Authentication-Results: mail.kernel.org; + dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="IRgzkkQ0" +Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand + id S1728637AbfHSWCp (ORCPT + <rfc822;linux-kernel@archiver.kernel.org>); + Mon, 19 Aug 2019 18:02:45 -0400 +Received: from mail-io1-f67.google.com ([209.85.166.67]:33900 "EHLO + mail-io1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org + with ESMTP id S1728494AbfHSWCo (ORCPT + <rfc822;linux-kernel@vger.kernel.org>); + Mon, 19 Aug 2019 18:02:44 -0400 +Received: by mail-io1-f67.google.com with SMTP id s21so7791675ioa.1; + Mon, 19 Aug 2019 15:02:44 -0700 (PDT) +DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; + d=gmail.com; s=20161025; + h=from:to:cc:subject:date:message-id:mime-version + :content-transfer-encoding; + bh=nkPsYIq5p1Usn95zadxgW7erLbA98guz1UFddB9orFo=; + b=IRgzkkQ0QlYiIqgU9DslAGaSx9oz5wU5adcfTZWc60ibm3DHynGVVixJrWxAut0Pae + ARzqaY1/pxrAMSpTdcKfCBtRoFPMFS8+WZsScW495O7Pf7bJTCDAo3OOueleEgGs9Osv + 59921BouToXc5Ovc92CQFjNHP3+/kGBqZvxV+QK34IvNWzoIEU93UHsUIxSn6eVvrsFU + g5treQ50nJkKHPa8rwc0Oh9s6WWKODy8zKxExTJhdznLdHOm5T7muHcEccqX8YZQ5L7d + ADPOmA+sRvWN3t/z9HxtD4g/Lgj4kzEYFnWJ9k7ClZwbnzn02QUlkT8waxriC/Wpe9nP + q53A== +X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; + d=1e100.net; s=20161025; + h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version + :content-transfer-encoding; + bh=nkPsYIq5p1Usn95zadxgW7erLbA98guz1UFddB9orFo=; + b=oYozfHj6p7SMaYdxmSXvkqz3omwdyg+ftHjVBaHiAqBlnLj6x9531et8jUk50jueoT + y2cU/oVuoVQsCwOEu43hu26qlol2JSmB1xXJj0Za8nKZa3h3GF5CKG8/dexHz8TzCJX1 + vo/TNPdY3AlW7Sn9JLnWCqFK+QgbPhjdBs+6Hbh+5nkCxIG5dVn0FfYbLYATeh/888YB + pTCJ8dkbLQiWXEJam6b9NoOpcIzbpcb7rL3A355C/1AGZsCy/NlKmneuw0Va10AnswkK + KBYv+EisB1L8oCP9l6r5fp4PUqyMH3TjrBdJddx8EQ9cq8SORiLtmmRuF8e3kdImDEK4 + 6Gcw== +X-Gm-Message-State: APjAAAXB6U8H/6BuBUmOb6K7bk/qaEOOS1bw9RIpAgXyrExtL8rl/B99 + 17LNTRGgJKvcUB6qlr4ZRbY= +X-Google-Smtp-Source: APXvYqzjT1oN5/e8keSQCjVxoTzLRGG1vuf4kTYM+hq51sy7QzOV0GLDOYYsYVB78xsRtsZrFijh0Q== +X-Received: by 2002:a6b:f30b:: with SMTP id m11mr21952710ioh.214.1566252163559; + Mon, 19 Aug 2019 15:02:43 -0700 (PDT) +Received: from peng.science.purdue.edu (cos-128-210-107-27.science.purdue.edu. [128.210.107.27]) + by smtp.googlemail.com with ESMTPSA id z9sm2850133ior.79.2019.08.19.15.02.42 + (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); + Mon, 19 Aug 2019 15:02:43 -0700 (PDT) +From: Hui Peng <benquike@gmail.com> +To: security@kernel.org +Cc: Hui Peng <benquike@gmail.com>, + Mathias Payer <mathias.payer@nebelwelt.net>, + Kalle Valo <kvalo@codeaurora.org>, + "David S. Miller" <davem@davemloft.net>, + linux-wireless@vger.kernel.org, netdev@vger.kernel.org, + linux-kernel@vger.kernel.org +Subject: [PATCH] Fix a double free bug in rsi_91x_deinit +Date: Mon, 19 Aug 2019 18:02:29 -0400 +Message-Id: <20190819220230.10597-1-benquike@gmail.com> +X-Mailer: git-send-email 2.22.1 +MIME-Version: 1.0 +Content-Transfer-Encoding: 8bit +Sender: linux-kernel-owner@vger.kernel.org +Precedence: bulk +List-ID: <linux-kernel.vger.kernel.org> +X-Mailing-List: linux-kernel@vger.kernel.org +Archived-At: <https://lore.kernel.org/lkml/20190819220230.10597-1-benquike@gmail.com/> +List-Archive: <https://lore.kernel.org/lkml/> +List-Post: <mailto:linux-kernel@vger.kernel.org> + +`dev` (struct rsi_91x_usbdev *) field of adapter +(struct rsi_91x_usbdev *) is allocated and initialized in +`rsi_init_usb_interface`. If any error is detected in information +read from the device side, `rsi_init_usb_interface` will be +freed. However, in the higher level error handling code in +`rsi_probe`, if error is detected, `rsi_91x_deinit` is called +again, in which `dev` will be freed again, resulting double free. + +This patch fixes the double free by removing the free operation on +`dev` in `rsi_init_usb_interface`, because `rsi_91x_deinit` is also +used in `rsi_disconnect`, in that code path, the `dev` field is not + (and thus needs to be) freed. + +This bug was found in v4.19, but is also present in the latest version +of kernel. + +Reported-by: Hui Peng <benquike@gmail.com> +Reported-by: Mathias Payer <mathias.payer@nebelwelt.net> +Signed-off-by: Hui Peng <benquike@gmail.com> +--- + drivers/net/wireless/rsi/rsi_91x_usb.c | 1 - + 1 file changed, 1 deletion(-) + +diff --git a/drivers/net/wireless/rsi/rsi_91x_usb.c b/drivers/net/wireless/rsi/rsi_91x_usb.c +index c0a163e40402..ac917227f708 100644 +--- a/drivers/net/wireless/rsi/rsi_91x_usb.c ++++ b/drivers/net/wireless/rsi/rsi_91x_usb.c +@@ -640,7 +640,6 @@ static int rsi_init_usb_interface(struct rsi_hw *adapter, + kfree(rsi_dev->tx_buffer); + + fail_eps: +- kfree(rsi_dev); + + return status; + } +-- +2.22.1 + + |