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| author | J. Bruce Fields <bfields@redhat.com> | 2012-05-15 05:20:54 +0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2012-06-01 04:29:57 +0400 |
| commit | 8fbba96e5b327665265ad02b7f331b68536828bf (patch) | |
| tree | 3a838a9a822042ac0a988e21e4824f64c1ada7f2 | |
| parent | 03a4e1f6ddf25f48848e1bddcffc0ad489648331 (diff) | |
| download | linux-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>
| -rw-r--r-- | fs/nfsd/nfs4state.c | 22 |
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) |