From 91a4762e0ab0880fa00e8f0b7a052e4929d867a6 Mon Sep 17 00:00:00 2001 From: Kevin Coffman Date: Wed, 18 Jan 2006 17:43:25 -0800 Subject: [PATCH] svcrpc: gss: server context init failure handling We require the server's gssd to create a completed context before asking the kernel to send a final context init reply. However, gssd could be buggy, or under some bizarre circumstances we might purge the context from our cache before we get the chance to use it here. Handle this case by returning GSS_S_NO_CONTEXT to the client. Also move the relevant code here to a separate function rather than nesting excessively. Signed-off-by: J. Bruce Fields Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- net/sunrpc/auth_gss/svcauth_gss.c | 29 +++++++++++++++++------------ 1 file changed, 17 insertions(+), 12 deletions(-) (limited to 'net') diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c index d2ccc7e8faabe8..fdad66dc9a9fc3 100644 --- a/net/sunrpc/auth_gss/svcauth_gss.c +++ b/net/sunrpc/auth_gss/svcauth_gss.c @@ -755,6 +755,21 @@ svcauth_gss_set_client(struct svc_rqst *rqstp) return SVC_OK; } +static inline int +gss_write_init_verf(struct svc_rqst *rqstp, struct rsi *rsip) +{ + struct rsc *rsci; + + if (rsip->major_status != GSS_S_COMPLETE) + return gss_write_null_verf(rqstp); + rsci = gss_svc_searchbyctx(&rsip->out_handle); + if (rsci == NULL) { + rsip->major_status = GSS_S_NO_CONTEXT; + return gss_write_null_verf(rqstp); + } + return gss_write_verf(rqstp, rsci->mechctx, GSS_SEQ_WIN); +} + /* * Accept an rpcsec packet. * If context establishment, punt to user space @@ -890,18 +905,8 @@ svcauth_gss_accept(struct svc_rqst *rqstp, u32 *authp) case -ENOENT: goto drop; case 0: - if (rsip->major_status == GSS_S_COMPLETE) { - rsci = gss_svc_searchbyctx(&rsip->out_handle); - if (!rsci) { - goto drop; - } - if (gss_write_verf(rqstp, rsci->mechctx, - GSS_SEQ_WIN)) - goto drop; - } else { - if (gss_write_null_verf(rqstp)) - goto drop; - } + if (gss_write_init_verf(rqstp, rsip)) + goto drop; if (resv->iov_len + 4 > PAGE_SIZE) goto drop; svc_putu32(resv, rpc_success); -- cgit 1.2.3-korg