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 018832C324F; Mon, 2 Jun 2025 14:36:52 +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=1748875013; cv=none; b=TLhMH5alKMX1BxkwMqGM+Dx/6V5m6e94dqr6/7qZK/VHY4uQozz9KiPbWnGJfXX2sOTuS7hrvzG4jcC3Jgq0pmfpoIlV9a9VKRRgFrVlPZpnVlKTpfGyyHfkmGF9enXpVeboRGdDsDtk/OTFPFl64at8l1W6YRIdUe5EvX44nnQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748875013; c=relaxed/simple; bh=PM/2+2q4xCmDXHzeWyW3UWSl5/hPWrYbqqarT+80irg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=t7wmdd/P63gescVeTadUKYX3tlacqSkmdqZNSx4F2N2FDKScI1WH7bB8ysprfr4I+m8gov1ya2JsQWu5xVu3FLjPcNlTcuWgmkUwMPFoGRcmG4kxe+YxXRQ2kHRqz795aMHNar9pkiYlEvb6g6ggJfDLwM4klhXWtSIeS90O5f4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=zyaa93YC; 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="zyaa93YC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7DC7DC4CEF0; Mon, 2 Jun 2025 14:36:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1748875012; bh=PM/2+2q4xCmDXHzeWyW3UWSl5/hPWrYbqqarT+80irg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zyaa93YCfs18VO0r9hr0sUhCKcNYE9AqEoTztRnqkdqeA+nB3SwRnIMZkeXg6M3nb V/XKiVKBBCsCKX/4t0DKYvKgYrIy971Sz8DJQ/YLIvtNLj0FyUw5m7BYWw/zBFrjQ2 cK8+pKsMZaNdqcXl2oH1n//YD6NJb3X2mqJL/Ye4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ivan Pravdin , Herbert Xu Subject: [PATCH 5.4 175/204] crypto: algif_hash - fix double free in hash_accept Date: Mon, 2 Jun 2025 15:48:28 +0200 Message-ID: <20250602134302.525812388@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250602134255.449974357@linuxfoundation.org> References: <20250602134255.449974357@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 5.4-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 @@ -262,10 +262,6 @@ 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; }