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 5C41056B9E for ; Fri, 1 Mar 2024 21:16:05 +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=1709327765; cv=none; b=WVcXG9KF4mo7XPxiURT/kgOa3hf+R4vrTolXGIW/4Uw0SC86XN8k+ADzUTl3yF0M/DaKfWQIaLddxG1LJ6/VvN9im+OcD260LHq0YpccQbe29jVsAQ/K+Af8VgXIpVYuvsvsgnkWEiD8i5OB+jnbwtHvmmNx0yx9qAVog8wZWeY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709327765; c=relaxed/simple; bh=QxGXazH5dJx+euCXIDtVH5/BHZtKZgwdkNhJq75gE6U=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=mHVn5F2vL1r2gdTM7j0AOPGp4e5LdxvGAc8ANgakRqdTcO7ixAuolWmxPj+G+TJEN5xtDpKPG9rwnzT2jsrSaKQC4x/eT0vDbD3wIobQBBzv4+60KqgatEsuz22RT12rsL/X0JOWe2CvtHHzQFpMyWoPo7czvdeER6VNnsxXh5M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=cn9t4yKC; 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="cn9t4yKC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7DC62C433C7; Fri, 1 Mar 2024 21:16:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1709327764; bh=QxGXazH5dJx+euCXIDtVH5/BHZtKZgwdkNhJq75gE6U=; h=From:To:Cc:Subject:Date:Reply-to:From; b=cn9t4yKCBVs1c8FEJuX/VDCGxDFP6uRYyrSxk4cHNZMmI9MVGDyi8aWhnPhtjFyCA cE14t0DwQWDYj/Tl4z34uf64yTcRWmiTAdNVhqH53qlJlb4MOOTeoioVWXbhTVSQvy nJI2Q7v0Cd7J2whldwjlZqYQZH1x0GUb3fgLYYMQ= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2021-47073: platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios Date: Fri, 1 Mar 2024 22:15:46 +0100 Message-ID: <2024030142-CVE-2021-47073-704a@gregkh> X-Mailer: git-send-email 2.44.0 Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Reply-to: , Content-Transfer-Encoding: 8bit Description =========== In the Linux kernel, the following vulnerability has been resolved: platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios init_dell_smbios_wmi() only registers the dell_smbios_wmi_driver on systems where the Dell WMI interface is supported. While exit_dell_smbios_wmi() unregisters it unconditionally, this leads to the following oops: [ 175.722921] ------------[ cut here ]------------ [ 175.722925] Unexpected driver unregister! [ 175.722939] WARNING: CPU: 1 PID: 3630 at drivers/base/driver.c:194 driver_unregister+0x38/0x40 ... [ 175.723089] Call Trace: [ 175.723094] cleanup_module+0x5/0xedd [dell_smbios] ... [ 175.723148] ---[ end trace 064c34e1ad49509d ]--- Make the unregister happen on the same condition the register happens to fix this. The Linux kernel CVE team has assigned CVE-2021-47073 to this issue. Affected and fixed versions =========================== Issue introduced in 4.15 with commit 1a258e670434 and fixed in 4.19.192 with commit 75cfc833da4a Issue introduced in 4.15 with commit 1a258e670434 and fixed in 5.4.122 with commit 6fa78a6b9a3b Issue introduced in 4.15 with commit 1a258e670434 and fixed in 5.10.40 with commit 0cf036a0d325 Issue introduced in 4.15 with commit 1a258e670434 and fixed in 5.12.7 with commit 8d746ea7c687 Issue introduced in 4.15 with commit 1a258e670434 and fixed in 5.13 with commit 3a53587423d2 Please see https://www.kernel.org or 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-2021-47073 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/platform/x86/dell/dell-smbios-wmi.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/75cfc833da4a2111106d4c134e93e0c7f41e35e7 https://git.kernel.org/stable/c/6fa78a6b9a3beb676a010dc489c1257f7e432525 https://git.kernel.org/stable/c/0cf036a0d325200e6c27b90908e51195bbc557b1 https://git.kernel.org/stable/c/8d746ea7c687bab060a2c05a35c449302406cd52 https://git.kernel.org/stable/c/3a53587423d25c87af4b4126a806a0575104b45e