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 B2D2A215764 for ; Wed, 26 Feb 2025 02:14:06 +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=1740536046; cv=none; b=fDUrDqSV6TFlmKwHFgLSydWL6PSSPCa6p44Vki9kmoL/7m2HVp+YttcTct4B8jNmLDWiTORe+AqJJWr0sZ593npQhRbMFF6I9B+INsbn1pA2P2sFbtspX1dMHcVanEEazACeO8A5Cv9PHxo4zAzkiS3Wa6/XIaDDh4wyYzqqNa8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740536046; c=relaxed/simple; bh=uboPkC78M/bSlNJhRGbzGUrdPQ+8d9TMw9gTeWocixY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=I/JJ7xM/B8qSlayAZGaq1PCCDDJW4wYf+GOpsjXtr0t/J7pyN7fPjEn7A8oA0lBgifcEh4eaDJpMQs3yPBSJnA41xXxB4jeJTsl4JtLH/lYCiGcdhuKr1YQ0FQtjI2OOgdvhwYoWzs58qpqD1UPiGiiDUpFzZ04JO1Tb/umFqYI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=seZn8yAj; 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="seZn8yAj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 854D3C4CEDD; Wed, 26 Feb 2025 02:14:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1740536046; bh=uboPkC78M/bSlNJhRGbzGUrdPQ+8d9TMw9gTeWocixY=; h=From:To:Cc:Subject:Date:Reply-to:From; b=seZn8yAjnYZXGcNMzxFJBtSZIgmhBfMApVYTxUcK9RaMEjZE2zlXlgcJcz2szhPvY WIslp2vTpt7n8374PKRlWajujhcEviLvmRA5iaJkIIuwp/qHYS6AngWk9NtkRU9XxX RLha8+U8+d4Oauf0iihcpp2Kp0YOhfFxd9XABXeo= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2022-49418: NFSv4: Fix free of uninitialized nfs4_label on referral lookup. Date: Wed, 26 Feb 2025 03:11:32 +0100 Message-ID: <2025022653-CVE-2022-49418-ff01@gregkh> X-Mailer: git-send-email 2.48.1 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=2901; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=uboPkC78M/bSlNJhRGbzGUrdPQ+8d9TMw9gTeWocixY=; b=owGbwMvMwCRo6H6F97bub03G02pJDOn7yj+9vLXnTuarZ9Ws7xff43XY7Lavxnhp51/25op/S yP5ig4c6ohlYRBkYpAVU2T5so3n6P6KQ4pehranYeawMoEMYeDiFICJ3KlkmO/d/jk9S2STw/7t wZd2NGl4bPsYZ8QwP3zjYw6O5bGnLLdN461Ynn65ccmJ2wA= 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: NFSv4: Fix free of uninitialized nfs4_label on referral lookup. Send along the already-allocated fattr along with nfs4_fs_locations, and drop the memcpy of fattr. We end up growing two more allocations, but this fixes up a crash as: PID: 790 TASK: ffff88811b43c000 CPU: 0 COMMAND: "ls" #0 [ffffc90000857920] panic at ffffffff81b9bfde #1 [ffffc900008579c0] do_trap at ffffffff81023a9b #2 [ffffc90000857a10] do_error_trap at ffffffff81023b78 #3 [ffffc90000857a58] exc_stack_segment at ffffffff81be1f45 #4 [ffffc90000857a80] asm_exc_stack_segment at ffffffff81c009de #5 [ffffc90000857b08] nfs_lookup at ffffffffa0302322 [nfs] #6 [ffffc90000857b70] __lookup_slow at ffffffff813a4a5f #7 [ffffc90000857c60] walk_component at ffffffff813a86c4 #8 [ffffc90000857cb8] path_lookupat at ffffffff813a9553 #9 [ffffc90000857cf0] filename_lookup at ffffffff813ab86b The Linux kernel CVE team has assigned CVE-2022-49418 to this issue. Affected and fixed versions =========================== Issue introduced in 5.16 with commit 9558a007dbc383d48e7f5a123d0b5ff656c71068 and fixed in 5.15.77 with commit eb1fe9600b86c24a789046bfc5c6851dda119280 Issue introduced in 5.16 with commit 9558a007dbc383d48e7f5a123d0b5ff656c71068 and fixed in 5.18.3 with commit 6015292653d95ba9f72906e2b65e536aa5807d64 Issue introduced in 5.16 with commit 9558a007dbc383d48e7f5a123d0b5ff656c71068 and fixed in 5.19 with commit c3ed222745d9ad7b69299b349a64ba533c64a34f 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-2022-49418 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: fs/nfs/nfs4namespace.c fs/nfs/nfs4proc.c fs/nfs/nfs4state.c fs/nfs/nfs4xdr.c include/linux/nfs_xdr.h 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/eb1fe9600b86c24a789046bfc5c6851dda119280 https://git.kernel.org/stable/c/6015292653d95ba9f72906e2b65e536aa5807d64 https://git.kernel.org/stable/c/c3ed222745d9ad7b69299b349a64ba533c64a34f