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| author |   J.Bruce Fields <bfields@fieldses.org> | 2006-10-04 02:16:07 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-04 07:55:19 -0700 |
| commit | 5b304bc5bfccc82b856e876e829c260df8e67ff2 (patch) | |
| tree | 1ef7b419ff3d0a43ea745b375a8aa8209b59d28e /net/sunrpc/auth_gss | |
| parent | [PATCH] knfsd: svcrpc: gss: factor out some common wrapping code (diff) | |
| download | linux-dev-5b304bc5bfccc82b856e876e829c260df8e67ff2.tar.xz linux-dev-5b304bc5bfccc82b856e876e829c260df8e67ff2.zip | |
[PATCH] knfsd: svcrpc: gss: fix failure on SVC_DENIED in integrity case
If the request is denied after gss_accept was called, we shouldn't try to wrap
the reply. We were checking the accept_stat but not the reply_stat.
To check the reply_stat in _release, we need a pointer to before (rather than
after) the verifier, so modify body_start appropriately.
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>
Diffstat (limited to 'net/sunrpc/auth_gss')
| -rw-r--r-- | net/sunrpc/auth_gss/svcauth_gss.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c index eeb1cce96649..447d9aef4605 100644 --- a/net/sunrpc/auth_gss/svcauth_gss.c +++ b/net/sunrpc/auth_gss/svcauth_gss.c @@ -903,9 +903,9 @@ out_seq: struct gss_svc_data { /* decoded gss client cred: */ struct rpc_gss_wire_cred clcred; - /* pointer to the beginning of the procedure-specific results, - * which may be encrypted/checksummed in svcauth_gss_release: */ - __be32 *body_start; + /* save a pointer to the beginning of the encoded verifier, + * for use in encryption/checksumming in svcauth_gss_release: */ + __be32 *verf_start; struct rsc *rsci; }; @@ -968,7 +968,7 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp) if (!svcdata) goto auth_err; rqstp->rq_auth_data = svcdata; - svcdata->body_start = NULL; + svcdata->verf_start = NULL; svcdata->rsci = NULL; gc = &svcdata->clcred; @@ -1097,6 +1097,7 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp) goto complete; case RPC_GSS_PROC_DATA: *authp = rpcsec_gsserr_ctxproblem; + svcdata->verf_start = resv->iov_base + resv->iov_len; if (gss_write_verf(rqstp, rsci->mechctx, gc->gc_seq)) goto auth_err; rqstp->rq_cred = rsci->cred; @@ -1110,7 +1111,6 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp) gc->gc_seq, rsci->mechctx)) goto auth_err; /* placeholders for length and seq. number: */ - svcdata->body_start = resv->iov_base + resv->iov_len; svc_putnl(resv, 0); svc_putnl(resv, 0); break; @@ -1119,7 +1119,6 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp) gc->gc_seq, rsci->mechctx)) goto auth_err; /* placeholders for length and seq. number: */ - svcdata->body_start = resv->iov_base + resv->iov_len; svc_putnl(resv, 0); svc_putnl(resv, 0); break; @@ -1150,14 +1149,21 @@ out: u32 * svcauth_gss_prepare_to_wrap(struct xdr_buf *resbuf, struct gss_svc_data *gsd) { - u32 *p; + u32 *p, verf_len; - p = gsd->body_start; - gsd->body_start = NULL; + p = gsd->verf_start; + gsd->verf_start = NULL; + + /* If the reply stat is nonzero, don't wrap: */ + if (*(p-1) != rpc_success) + return NULL; + /* Skip the verifier: */ + p += 1; + verf_len = ntohl(*p++); + p += XDR_QUADLEN(verf_len); /* move accept_stat to right place: */ memcpy(p, p + 2, 4); - /* Don't wrap in failure case: */ - /* Counting on not getting here if call was not even accepted! */ + /* Also don't wrap if the accept stat is nonzero: */ if (*p != rpc_success) { resbuf->head[0].iov_len -= 2 * 4; return NULL; @@ -1283,7 +1289,7 @@ svcauth_gss_release(struct svc_rqst *rqstp) if (gc->gc_proc != RPC_GSS_PROC_DATA) goto out; /* Release can be called twice, but we only wrap once. */ - if (gsd->body_start == NULL) + if (gsd->verf_start == NULL) goto out; /* normally not set till svc_send, but we need it here: */ /* XXX: what for? Do we mess it up the moment we call svc_putu32 |