From 8fbba96e5b327665265ad02b7f331b68536828bf Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Mon, 14 May 2012 21:20:54 -0400 Subject: [PATCH] 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 --- fs/nfsd/nfs4state.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) 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; ingroups; 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)