From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794061020; b=LvlrBGuf9w8TNI5NkelcdtvtBzgVEPS1kk5QENUhXOVWZqre3qmlhd1y5y3Kg2Ye7uKE cyFdM+ZFBVz9qyo8Wr8CmqWZdiMHJcgXc3gMV/0wd/rXg0OHeu6NjCgeAvXUHP0mzig1H K/T6uiaH73eQsE8Rh3Bq7HlNihHsRpagWW0KqwObxhi4fP2TX8vBn5Lx3QtCVkg3uVuaJ p0BDGKWfdGFI12ezR/KTU4NuRtExPblbw9t7MtTbQ75E7sftk4iLUSgLU89a7Gubl5oZx olJI4cMKd0/Pbeg2AS62He82T5aqJtMuF098Qrt78qpcQxYmqmu7uuU58ucWhT9maQw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794061020; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=Yypc5MMmOkKGc6fLSaWXS9zKNAun9tOtDFvtyN43SmA=; b=gQU7+dN2xP7TSEwntmJ0Efutn80fYj7yIvhsY+9DvRsjjZs7xcyHXoRv8r/2wedE9l6k EzO6UTrkugicEXb00kcoQ6tW161MLUdFB6fo9z9jMeFWG1kN+tsVW4n9BxiicFYfpe1bS kvcVA74sTg6wfMfeR65oD/9rAtBLHEGO5a43qlR3gsYiVtn1IjrDDTkehMoeaauvxichp 4mrFQXk+MlrjUCmzrzDiEmF3m1LgeYHJEoeuHk58Ljaat25AkvIlnvz2B4YO/WrYYj9jg q7FQab3G6ERtiSxe94ZxY/5w0CrMOqGTo3Tw4pYjETFkqPJZvfkhbrNWcTL64G8msLg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=hV+ObElU; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C61A0606EEAB; Sat, 7 Nov 2026 14:16:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=hV+ObElU Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5DA381F008A1; Sat, 7 Nov 2026 14:16:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794061019; bh=Yypc5MMmOkKGc6fLSaWXS9zKNAun9tOtDFvtyN43SmA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=hV+ObElU20RfSANrMtOT0UK2PS5m8i3ZYi65bIdMHKOUXKNaPvq2mK0qTGkiQJ12T J5MJTWADEBBmth6NwNIOwNmaz7/0IUojBBm8Ubm/CCK7ag6Cv8lYnnPVifOgadfAKA jUxhWJGdWuh4Eevu9oNEdnOVnhiZr+7J1mKdeJNg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Thomas Huth , Namjae Jeon , Sasha Levin Subject: [PATCH 6.12 0358/1536] smb: server: Free session data in user_session.c with kfree_sensitive() Date: Sat, 7 Nov 2026 08:39:34 -0500 Message-ID: <20261107135007.715784054@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134957.653319350@linuxfoundation.org> References: <20261107134957.653319350@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thomas Huth [ Upstream commit 9a4bd6507c21f66e84dc021705a4b9d84773111e ] struct ksmbd_session contains some arrays with sensitive information, like sess_key, smb3encryptionkey, smb3decryptionkey and smb3signingkey. Thus let's make sure that this information cannot leak via the heap and use kfree_sensitive() to free it. Signed-off-by: Thomas Huth Signed-off-by: Namjae Jeon Signed-off-by: Sasha Levin --- fs/smb/server/mgmt/user_session.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/smb/server/mgmt/user_session.c b/fs/smb/server/mgmt/user_session.c index 0c65a862f8589..1dd955a977be3 100644 --- a/fs/smb/server/mgmt/user_session.c +++ b/fs/smb/server/mgmt/user_session.c @@ -168,10 +168,10 @@ void ksmbd_session_destroy(struct ksmbd_session *sess) ksmbd_launch_ksmbd_durable_scavenger(); ksmbd_session_rpc_clear_list(sess); free_channel_list(sess); - kfree(sess->Preauth_HashValue); + kfree_sensitive(sess->Preauth_HashValue); ksmbd_release_id(&session_ida, sess->id); ida_destroy(&sess->tree_conn_ida); - kfree(sess); + kfree_sensitive(sess); } struct ksmbd_session *__session_lookup(unsigned long long id) -- 2.53.0