Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752223AbdFHAI4 (ORCPT ); Wed, 7 Jun 2017 20:08:56 -0400 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:50151 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752118AbdFGXCT (ORCPT ); Wed, 7 Jun 2017 19:02:19 -0400 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, linux@roeck-us.net Cc: "J. Bruce Fields" , Simo Sorce , Willy Tarreau Subject: [PATCH 3.10 112/250] svcrpc: fix oops in absence of krb5 module Date: Thu, 8 Jun 2017 00:58:18 +0200 Message-Id: <1496876436-32402-113-git-send-email-w@1wt.eu> X-Mailer: git-send-email 2.8.0.rc2.1.gbe9624a In-Reply-To: <1496876436-32402-1-git-send-email-w@1wt.eu> References: <1496876436-32402-1-git-send-email-w@1wt.eu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2552 Lines: 62 From: "J. Bruce Fields" commit 034dd34ff4916ec1f8f74e39ca3efb04eab2f791 upstream. Olga Kornievskaia says: "I ran into this oops in the nfsd (below) (4.10-rc3 kernel). To trigger this I had a client (unsuccessfully) try to mount the server with krb5 where the server doesn't have the rpcsec_gss_krb5 module built." The problem is that rsci.cred is copied from a svc_cred structure that gss_proxy didn't properly initialize. Fix that. [120408.542387] general protection fault: 0000 [#1] SMP ... [120408.565724] CPU: 0 PID: 3601 Comm: nfsd Not tainted 4.10.0-rc3+ #16 [120408.567037] Hardware name: VMware, Inc. VMware Virtual = Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015 [120408.569225] task: ffff8800776f95c0 task.stack: ffffc90003d58000 [120408.570483] RIP: 0010:gss_mech_put+0xb/0x20 [auth_rpcgss] ... [120408.584946] ? rsc_free+0x55/0x90 [auth_rpcgss] [120408.585901] gss_proxy_save_rsc+0xb2/0x2a0 [auth_rpcgss] [120408.587017] svcauth_gss_proxy_init+0x3cc/0x520 [auth_rpcgss] [120408.588257] ? __enqueue_entity+0x6c/0x70 [120408.589101] svcauth_gss_accept+0x391/0xb90 [auth_rpcgss] [120408.590212] ? try_to_wake_up+0x4a/0x360 [120408.591036] ? wake_up_process+0x15/0x20 [120408.592093] ? svc_xprt_do_enqueue+0x12e/0x2d0 [sunrpc] [120408.593177] svc_authenticate+0xe1/0x100 [sunrpc] [120408.594168] svc_process_common+0x203/0x710 [sunrpc] [120408.595220] svc_process+0x105/0x1c0 [sunrpc] [120408.596278] nfsd+0xe9/0x160 [nfsd] [120408.597060] kthread+0x101/0x140 [120408.597734] ? nfsd_destroy+0x60/0x60 [nfsd] [120408.598626] ? kthread_park+0x90/0x90 [120408.599448] ret_from_fork+0x22/0x30 Fixes: 1d658336b05f "SUNRPC: Add RPC based upcall mechanism for RPCGSS auth" Cc: Simo Sorce Reported-by: Olga Kornievskaia Tested-by: Olga Kornievskaia Signed-off-by: J. Bruce Fields Signed-off-by: Willy Tarreau --- net/sunrpc/auth_gss/gss_rpc_xdr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/sunrpc/auth_gss/gss_rpc_xdr.c b/net/sunrpc/auth_gss/gss_rpc_xdr.c index e0062c5..a9ca705 100644 --- a/net/sunrpc/auth_gss/gss_rpc_xdr.c +++ b/net/sunrpc/auth_gss/gss_rpc_xdr.c @@ -260,7 +260,7 @@ static int gssx_dec_option_array(struct xdr_stream *xdr, if (!oa->data) return -ENOMEM; - creds = kmalloc(sizeof(struct svc_cred), GFP_KERNEL); + creds = kzalloc(sizeof(struct svc_cred), GFP_KERNEL); if (!creds) { kfree(oa->data); return -ENOMEM; -- 2.8.0.rc2.1.gbe9624a