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 2E47A2C324F; Mon, 2 Jun 2025 15:15:49 +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=1748877349; cv=none; b=aKOinOg+2LUiM9+G6t9yaYwngY1ZykXMSloeTM1V9gb4dsA3WkFC9YSrfSM7N8wt0Tm8/cgaVuPInKuEgemxlFSENN/E/JXtszyCrvEucEjkBVclO3iUZ2sjG6dqIvuqqseY8EmG7yzEjPjbxUgVsclL5660ldrClB5585GeIws= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748877349; c=relaxed/simple; bh=Sm6N14lkQTAEp5SiPFuZzqKmpLdZgUmv1MgcPg/if8I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=akTbO+X9evT6eqSKfFk1CyBNICnqPy1LUE5Jvn2QYCFX1ADxrniD/9OSvtJyvk+BQDPY4fUT42/dBKL0m1wGRqzoTpfzjX3B9r1PucuIc9Wf+4hnfkxfGAtPN7Amcby9eq83dAn6cOP0Z/ra9rr7EuMZVLbwU0QdsuqlguEqOiQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=SfsUwUux; 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="SfsUwUux" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92312C4CEEE; Mon, 2 Jun 2025 15:15:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1748877349; bh=Sm6N14lkQTAEp5SiPFuZzqKmpLdZgUmv1MgcPg/if8I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SfsUwUuxiucEXet65bk1C8FJPCr0msjK5vZ1ulC3BrPsRijQVD9hGGjfPOotcJbQW xewbTgU3yQR3QX9yqU3RakFk+P09OIrMM9ukKVkFXv7Wg3CWltQQ6TN6MJXNCPUuaE dJRVc8Qu/3bYyjrbGiY/ky4tfCitua75eDz4BeRM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ivan Pravdin , Herbert Xu Subject: [PATCH 6.1 250/325] crypto: algif_hash - fix double free in hash_accept Date: Mon, 2 Jun 2025 15:48:46 +0200 Message-ID: <20250602134329.937545350@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250602134319.723650984@linuxfoundation.org> References: <20250602134319.723650984@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ivan Pravdin commit b2df03ed4052e97126267e8c13ad4204ea6ba9b6 upstream. If accept(2) is called on socket type algif_hash with MSG_MORE flag set and crypto_ahash_import fails, sk2 is freed. However, it is also freed in af_alg_release, leading to slab-use-after-free error. Fixes: fe869cdb89c9 ("crypto: algif_hash - User-space interface for hash operations") Cc: Signed-off-by: Ivan Pravdin Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- crypto/algif_hash.c | 4 ---- 1 file changed, 4 deletions(-) --- a/crypto/algif_hash.c +++ b/crypto/algif_hash.c @@ -263,10 +263,6 @@ static int hash_accept(struct socket *so return err; err = crypto_ahash_import(&ctx2->req, state); - if (err) { - sock_orphan(sk2); - sock_put(sk2); - } return err; }