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[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 <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Kevin Coffman 2006-01-18 17:43:25 -08:00 committed by Linus Torvalds
parent 822f1005ae
commit 91a4762e0a
1 changed files with 17 additions and 12 deletions
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29
net/sunrpc/auth_gss/svcauth_gss.c
View File

@ -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);