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authorJ. Bruce Fields <bfields@redhat.com>2012-05-15 05:20:54 +0400
committerJ. Bruce Fields <bfields@redhat.com>2012-06-01 04:29:57 +0400
commit8fbba96e5b327665265ad02b7f331b68536828bf (patch)
tree3a838a9a822042ac0a988e21e4824f64c1ada7f2 /fs/nfsd
parent03a4e1f6ddf25f48848e1bddcffc0ad489648331 (diff)
downloadlinux-8fbba96e5b327665265ad02b7f331b68536828bf.tar.xz
nfsd4: stricter cred comparison for setclientid/exchange_id
The typical setclientid or exchange_id will probably be performed with a credential that maps to either root or nobody, so comparing just uid's is unlikely to be useful. So, use everything else we can get our hands on. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfs4state.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 37bafb290c11..6dc0cfb37541 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1201,11 +1201,31 @@ same_clid(clientid_t *cl1, clientid_t *cl2)
return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
}
+static bool groups_equal(struct group_info *g1, struct group_info *g2)
+{
+ int i;
+
+ if (g1->ngroups != g2->ngroups)
+ return false;
+ for (i=0; i<g1->ngroups; i++)
+ if (GROUP_AT(g1, i) != GROUP_AT(g2, i))
+ return false;
+ return true;
+}
+
/* XXX what about NGROUP */
static int
same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
{
- return cr1->cr_uid == cr2->cr_uid;
+ if ((cr1->cr_uid != cr2->cr_uid)
+ || (cr1->cr_gid != cr2->cr_gid)
+ || !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
+ return false;
+ if (cr1->cr_principal == cr2->cr_principal)
+ return true;
+ if (!cr1->cr_principal || !cr2->cr_principal)
+ return false;
+ return 0 == strcmp(cr1->cr_principal, cr1->cr_principal);
}
static void gen_clid(struct nfs4_client *clp)