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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>
wifi-calibration
Trond Myklebust 2012-01-23 12:49:36 -05:00
parent dcd6c92267
commit 875ad3f8e7
1 changed files with 16 additions and 1 deletions
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17
net/sunrpc/auth_generic.c
View File

@ -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... */