From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A912E3F9C5 for ; Fri, 27 Dec 2024 13:53:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735307637; cv=none; b=VZSuYVtUpx0V+PMRH2b0hG+Rpx0ljToOyGrheQ207dUXFulzcJ9cCx2YbYogKvvXIB+HNtV/PIWVcuPpxAxhj3VzHUsqtWEsk4YZkL20YNdNWAIBVBs7ot78E86Ec9estFw6r/pRMeFdY3YxaI7n4F2fu3EM+UziIeqBXeZjrnA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735307637; c=relaxed/simple; bh=ArPNgUq0eoC5Hg4jRrGcyZzP5XPXaJGiz9oD7ewxNVQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=RHkBdlje9nzk/7BNSXPhE9mVoqbYAmu6dZhh6uw8Btx8l61kQmuThYvXXHENnYq1pL/lmHxcpFbsDgUfHWW7IsIFV+630A2UM4By68UqkiNDuJ8xZsBBZAdnWf1xD7x+79jr420AEDV3JKxrxiAXNLhI9DOiOZWA2N2U8r5F1Do= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=WEocGip2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="WEocGip2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 31B7CC4CED0; Fri, 27 Dec 2024 13:53:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1735307637; bh=ArPNgUq0eoC5Hg4jRrGcyZzP5XPXaJGiz9oD7ewxNVQ=; h=From:To:Cc:Subject:Date:Reply-to:From; b=WEocGip2UpTe1pV3l22W+uuhmpUJ42MjS1kJGAu8iPOK9dNDqhlOcvu0IWOW0xxCg 3L2sUnb/18jZjCBtZ6Uajn5101XfN3TNGoA+f9yIg1yhDy6KzW8Xw1M6OF4P8J7wp6 vosnjqZJ5fMFBqHOdmF4R3+B2zLS1bx5qaeyIeYs= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2024-53192: clk: clk-loongson2: Fix potential buffer overflow in flexible-array member access Date: Fri, 27 Dec 2024 14:52:38 +0100 Message-ID: <2024122723-CVE-2024-53192-2fd5@gregkh> X-Mailer: git-send-email 2.47.1 Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Reply-to: , X-Developer-Signature: v=1; a=openpgp-sha256; l=3164; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=ArPNgUq0eoC5Hg4jRrGcyZzP5XPXaJGiz9oD7ewxNVQ=; b=owGbwMvMwCRo6H6F97bub03G02pJDOl5G8Wfym441+C/vcmvZ6Oa6EGr2iRXa7WMdKvc/eL77 SRfWm7siGVhEGRikBVTZPmyjefo/opDil6Gtqdh5rAygQxh4OIUgIm84GSYp2u50XfjvtcH5Q/e uTVzo+pz3Z/nLRnm2U3oVuab7l9nuvFlW5XoF04tjSPrAA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit Description =========== In the Linux kernel, the following vulnerability has been resolved: clk: clk-loongson2: Fix potential buffer overflow in flexible-array member access Flexible-array member `hws` in `struct clk_hw_onecell_data` is annotated with the `counted_by()` attribute. This means that when memory is allocated for this array, the _counter_, which in this case is member `num` in the flexible structure, should be set to the maximum number of elements the flexible array can contain, or fewer. In this case, the total number of elements for the flexible array is determined by variable `clks_num` when allocating heap space via `devm_kzalloc()`, as shown below: 289 struct loongson2_clk_provider *clp; ... 296 for (p = data; p->name; p++) 297 clks_num++; 298 299 clp = devm_kzalloc(dev, struct_size(clp, clk_data.hws, clks_num), 300 GFP_KERNEL); So, `clp->clk_data.num` should be set to `clks_num` or less, and not exceed `clks_num`, as is currently the case. Otherwise, if data is written into `clp->clk_data.hws[clks_num]`, the instrumentation provided by the compiler won't detect the overflow, leading to a memory corruption bug at runtime. Fix this issue by setting `clp->clk_data.num` to `clks_num`. The Linux kernel CVE team has assigned CVE-2024-53192 to this issue. Affected and fixed versions =========================== Issue introduced in 6.10 with commit 9796ec0bd04bb0e70487127d44949ca0554df5d3 and fixed in 6.11.11 with commit b96fc194984d0c82de1ca2b4166b35b1298b216c Issue introduced in 6.10 with commit 9796ec0bd04bb0e70487127d44949ca0554df5d3 and fixed in 6.12.2 with commit 1bf8877150128c3abd9d233886a05f6966fbf0c7 Issue introduced in 6.10 with commit 9796ec0bd04bb0e70487127d44949ca0554df5d3 and fixed in 6.13-rc1 with commit 02fb4f0084331ef72c28d0c70fcb15d1bea369ec Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2024-53192 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/clk/clk-loongson2.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/b96fc194984d0c82de1ca2b4166b35b1298b216c https://git.kernel.org/stable/c/1bf8877150128c3abd9d233886a05f6966fbf0c7 https://git.kernel.org/stable/c/02fb4f0084331ef72c28d0c70fcb15d1bea369ec