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 9CE751EE02B; Tue, 12 Nov 2024 10:35:54 +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=1731407754; cv=none; b=ThDu5htlwaChxqeoJCa+GYRQLGuLEPiiaEcyJPWwhp0k1E72J5S4tJJb8/5G2TjDBBeLEng/e+euBwk+ZJBDWxFPNo51imqG2W8ALS6XSL/oW5WlcM+oi3Gv2yDG+ldXR51R6/rmxjdcVy6W8fllc/pDy5GBtvXFZq4KpFVIB10= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731407754; c=relaxed/simple; bh=aeySF/2whujQQ56XLxhqU6zijNuT1nDoJhfSSykRglU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jhluTHixzKfe8Mcy21hzV9YHbr6YBcJBZl30/1+KPc2ldCec0v3P+nu4wz1YFaSmi94Mhgaq/1Li/C9Ja5G4uKioBvSAxq+YTULUHftMRHX2q/W0IM+syGUwjU9/bcGxziKzPMexGxLVscnQTFapTUDjIs9ccOTLr4alWbDq+2c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=XRS1II59; 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="XRS1II59" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 09944C4CED6; Tue, 12 Nov 2024 10:35:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1731407754; bh=aeySF/2whujQQ56XLxhqU6zijNuT1nDoJhfSSykRglU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XRS1II59S69+XDW38vr3iJ14XMJzH8pchJdYFzu5IcGo/WLRA1eQosOeb5A5vVVbz WAGj/OdQvdA/4vdMroZT9+nR5DSBvqAfk8P3zclKe3zUFy54kuW3gBWR+gHW1J/PQf VyWFaUuzHMRsSJeI/ffu0ZgmUgIcJPYZr7D/XPLQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Norbert Szetei , Namjae Jeon , Steve French Subject: [PATCH 6.6 073/119] ksmbd: fix slab-use-after-free in smb3_preauth_hash_rsp Date: Tue, 12 Nov 2024 11:21:21 +0100 Message-ID: <20241112101851.506678100@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241112101848.708153352@linuxfoundation.org> References: <20241112101848.708153352@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Namjae Jeon commit b8fc56fbca7482c1e5c0e3351c6ae78982e25ada upstream. ksmbd_user_session_put should be called under smb3_preauth_hash_rsp(). It will avoid freeing session before calling smb3_preauth_hash_rsp(). Cc: stable@vger.kernel.org # v5.15+ Reported-by: Norbert Szetei Tested-by: Norbert Szetei Signed-off-by: Namjae Jeon Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- fs/smb/server/server.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/fs/smb/server/server.c +++ b/fs/smb/server/server.c @@ -238,11 +238,11 @@ static void __handle_ksmbd_work(struct k } while (is_chained == true); send: - if (work->sess) - ksmbd_user_session_put(work->sess); if (work->tcon) ksmbd_tree_connect_put(work->tcon); smb3_preauth_hash_rsp(work); + if (work->sess) + ksmbd_user_session_put(work->sess); if (work->sess && work->sess->enc && work->encrypted && conn->ops->encrypt_resp) { rc = conn->ops->encrypt_resp(work);