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authorTrond Myklebust <Trond.Myklebust@netapp.com>2012-01-23 12:49:36 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-01-23 14:03:46 -0800
commit875ad3f8e7dff6bc1d053e5bfe73d8e8d2e6ae67 (patch)
treedec3691908348b240f2176ce681a7e4aa75e5fde /net/sunrpc/auth_generic.c
parentdcd6c92267155e70a94b3927bce681ce74b80d1f (diff)
downloadlinux-875ad3f8e7dff6bc1d053e5bfe73d8e8d2e6ae67.tar.gz
SUNRPC: Fix machine creds in generic_create_cred and generic_match
- generic_create_cred needs to copy the '.principal' field. - generic_match needs to ignore the groups and match on the '.principal' field. This fixes an Oops that was introduced by commit 68c9715 (SUNRPC: Clean up the RPCSEC_GSS service ticket requests) Reported-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Tested-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc/auth_generic.c')
-rw-r--r--net/sunrpc/auth_generic.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/net/sunrpc/auth_generic.c b/net/sunrpc/auth_generic.c
index 1426ec3d0a5..75762f34697 100644
--- a/net/sunrpc/auth_generic.c
+++ b/net/sunrpc/auth_generic.c
@@ -92,6 +92,7 @@ generic_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
if (gcred->acred.group_info != NULL)
get_group_info(gcred->acred.group_info);
gcred->acred.machine_cred = acred->machine_cred;
+ gcred->acred.principal = acred->principal;
dprintk("RPC: allocated %s cred %p for uid %d gid %d\n",
gcred->acred.machine_cred ? "machine" : "generic",
@@ -123,6 +124,17 @@ generic_destroy_cred(struct rpc_cred *cred)
call_rcu(&cred->cr_rcu, generic_free_cred_callback);
}
+static int
+machine_cred_match(struct auth_cred *acred, struct generic_cred *gcred, int flags)
+{
+ if (!gcred->acred.machine_cred ||
+ gcred->acred.principal != acred->principal ||
+ gcred->acred.uid != acred->uid ||
+ gcred->acred.gid != acred->gid)
+ return 0;
+ return 1;
+}
+
/*
* Match credentials against current process creds.
*/
@@ -132,9 +144,12 @@ generic_match(struct auth_cred *acred, struct rpc_cred *cred, int flags)
struct generic_cred *gcred = container_of(cred, struct generic_cred, gc_base);
int i;
+ if (acred->machine_cred)
+ return machine_cred_match(acred, gcred, flags);
+
if (gcred->acred.uid != acred->uid ||
gcred->acred.gid != acred->gid ||
- gcred->acred.machine_cred != acred->machine_cred)
+ gcred->acred.machine_cred != 0)
goto out_nomatch;
/* Optimisation in the case where pointers are identical... */