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 8FE291FCC6F for ; Mon, 21 Oct 2024 20:14:20 +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=1729541660; cv=none; b=JzD4bGKRP7Usplo8mSQynGPhrzwT7yBQ3GuhgmDBnCQ5IGTxr2pSvJs9/CXIDYHKYL7BtIzEo7g0DjTDihX8WWgEvmWs/2W/z5nCX1l/4kfCIYXPhP9D0BvuFc7ktYrnFgZQNIJy6QsMzyt/8HWdm0uzMnAiaDOQvsnYiG5tL50= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729541660; c=relaxed/simple; bh=tHkoVcpU77eOhhy+xpUEY7pU5cNIy1u4nJ3hEfbPv4Q=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=i0Bv5cSzlvHl7GG7mfxY+WThAK2SxiFS//ef+e2RZsF+zd+VQl0toWUOPHqOMGLe/uu09ZQTGkSecyDBBkFExWNm908GzxRrVQU2Jau+HxJlTMay5VVzgIxocBM4T00uGV7SM+dMBFCx1vSDHlL3V0cE5XeDdWIRyM3MenBI9pA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Rj+Ys9Iw; 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="Rj+Ys9Iw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 13667C4CEC3; Mon, 21 Oct 2024 20:14:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1729541660; bh=tHkoVcpU77eOhhy+xpUEY7pU5cNIy1u4nJ3hEfbPv4Q=; h=From:To:Cc:Subject:Date:Reply-to:From; b=Rj+Ys9Iwf/FR+QyO7vuLjIJPo7E5Gm+S/JteVNLb63uP22+UrCVUB+jUtuR4fSWql mSlBORjzr6IsY/oTcK/I/4fGB/WCg/wlv4MdMGNSSfpvELk9CmOHj1pT0WRD05gk4T XItDsA3iLucTpS9usplKCGhjJIusF2C6z6m7vpwQ= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2022-49030: libbpf: Handle size overflow for ringbuf mmap Date: Mon, 21 Oct 2024 22:07:02 +0200 Message-ID: <2024102155-CVE-2022-49030-cee8@gregkh> X-Mailer: git-send-email 2.47.0 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=2417; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=tHkoVcpU77eOhhy+xpUEY7pU5cNIy1u4nJ3hEfbPv4Q=; b=owGbwMvMwCRo6H6F97bub03G02pJDOliW1Q4DrndmJHnf9r3BWf32uZiTtvb5s/Wnk6tYHDYZ rxhuc3SjlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZjIqzUMC8418cYwvfT4cyrn 6MLyoxdNH8WzvWFYcKjuA5+uQcyvTPbrx9SCLz4XSd9kCQA= 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: libbpf: Handle size overflow for ringbuf mmap The maximum size of ringbuf is 2GB on x86-64 host, so 2 * max_entries will overflow u32 when mapping producer page and data pages. Only casting max_entries to size_t is not enough, because for 32-bits application on 64-bits kernel the size of read-only mmap region also could overflow size_t. So fixing it by casting the size of read-only mmap region into a __u64 and checking whether or not there will be overflow during mmap. The Linux kernel CVE team has assigned CVE-2022-49030 to this issue. Affected and fixed versions =========================== Issue introduced in 5.8 with commit bf99c936f947 and fixed in 5.10.158 with commit 8a549ab67245 Issue introduced in 5.8 with commit bf99c936f947 and fixed in 5.15.82 with commit 0140e079a420 Issue introduced in 5.8 with commit bf99c936f947 and fixed in 6.0.12 with commit 535a25ab4f9a Issue introduced in 5.8 with commit bf99c936f947 and fixed in 6.1 with commit 927cbb478adf 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-2022-49030 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: tools/lib/bpf/ringbuf.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/8a549ab6724520aa3c07f47e0eba820293551490 https://git.kernel.org/stable/c/0140e079a42064680394fff1199a7b5483688dec https://git.kernel.org/stable/c/535a25ab4f9a45f74ba38ab71de95e97474922ed https://git.kernel.org/stable/c/927cbb478adf917e0a142b94baa37f06279cc466