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 5D37E13DDB5; Thu, 13 Jun 2024 12:35:12 +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=1718282112; cv=none; b=vC3iSypsL9023xhMml0Mm0TLclB2GFjOOW7Qh1dftMD+1Mopq6S85+FAvWA2ZDfhrRnqy8aUadVAj4jMKnTfmaK56+2HVkHSFd4/MQOf+ya4dgisfvursqRd0bfvAGms18cnuOXBwAoI9LZ26rGUKTjwIzeCyEweuPlcv2Ug4+s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718282112; c=relaxed/simple; bh=jXQf566/3Z89zLHWM/1JHccMRh41XKpKQdUnBvUlLwI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WUt/FsfoK7lyC4HVPVhoYXiBscirmp+exjTzEO1Jeu27rvScfwyUQM5D712uFpoopf3Wwro2l44Jb0YNaZuOzEwtmfsdb7K5CxduGD/BzbK8GwWhv1UfH88seX3hUCQklsKiegZShT4aEd4LHJHV98aCIvmuP9fFiy4NrKjJabE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nz5/7QTu; 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="nz5/7QTu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8E8EAC4AF1A; Thu, 13 Jun 2024 12:35:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1718282112; bh=jXQf566/3Z89zLHWM/1JHccMRh41XKpKQdUnBvUlLwI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nz5/7QTuO/eBCGJdp9gRqt66g2F9ZBKRMXkbk88KyVsdwrGs0fH5L2KHiTs3uLKLM pgMTxZncAU2yd+QSL741PNqp29azL5ugq4kOv9mBknAWEjXKSO3FbSEuwPNWwFgrMi RjKRQg0Bm+7iA8SQsyLgaR+bYDNx9KlmrHHeVQCI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dan Carpenter , Trond Myklebust , Chuck Lever , Sasha Levin Subject: [PATCH 5.15 167/402] SUNRPC: Fix gss_free_in_token_pages() Date: Thu, 13 Jun 2024 13:32:04 +0200 Message-ID: <20240613113308.651626196@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240613113302.116811394@linuxfoundation.org> References: <20240613113302.116811394@linuxfoundation.org> User-Agent: quilt/0.67 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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chuck Lever [ Upstream commit bafa6b4d95d97877baa61883ff90f7e374427fae ] Dan Carpenter says: > Commit 5866efa8cbfb ("SUNRPC: Fix svcauth_gss_proxy_init()") from Oct > 24, 2019 (linux-next), leads to the following Smatch static checker > warning: > > net/sunrpc/auth_gss/svcauth_gss.c:1039 gss_free_in_token_pages() > warn: iterator 'i' not incremented > > net/sunrpc/auth_gss/svcauth_gss.c > 1034 static void gss_free_in_token_pages(struct gssp_in_token *in_token) > 1035 { > 1036 u32 inlen; > 1037 int i; > 1038 > --> 1039 i = 0; > 1040 inlen = in_token->page_len; > 1041 while (inlen) { > 1042 if (in_token->pages[i]) > 1043 put_page(in_token->pages[i]); > ^ > This puts page zero over and over. > > 1044 inlen -= inlen > PAGE_SIZE ? PAGE_SIZE : inlen; > 1045 } > 1046 > 1047 kfree(in_token->pages); > 1048 in_token->pages = NULL; > 1049 } Based on the way that the ->pages[] array is constructed in gss_read_proxy_verf(), we know that once the loop encounters a NULL page pointer, the remaining array elements must also be NULL. Reported-by: Dan Carpenter Suggested-by: Trond Myklebust Fixes: 5866efa8cbfb ("SUNRPC: Fix svcauth_gss_proxy_init()") Signed-off-by: Chuck Lever Signed-off-by: Sasha Levin --- net/sunrpc/auth_gss/svcauth_gss.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c index 48b608cb5f5ec..6ad1757718505 100644 --- a/net/sunrpc/auth_gss/svcauth_gss.c +++ b/net/sunrpc/auth_gss/svcauth_gss.c @@ -1132,17 +1132,11 @@ gss_read_verf(struct rpc_gss_wire_cred *gc, static void gss_free_in_token_pages(struct gssp_in_token *in_token) { - u32 inlen; int i; i = 0; - inlen = in_token->page_len; - while (inlen) { - if (in_token->pages[i]) - put_page(in_token->pages[i]); - inlen -= inlen > PAGE_SIZE ? PAGE_SIZE : inlen; - } - + while (in_token->pages[i]) + put_page(in_token->pages[i++]); kfree(in_token->pages); in_token->pages = NULL; } -- 2.43.0