From 03bc6d1cc1759e6b5959cacc02a19ef36e95e741 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Sat, 2 Feb 2013 06:24:49 -0800 Subject: [PATCH] nfsd: Modify nfsd4_cb_sec to use kuids and kgids Change uid and gid in struct nfsd4_cb_sec to be of type kuid_t and kgid_t. In nfsd4_decode_cb_sec when reading uids and gids off the wire convert them to kuids and kgids, and if they don't convert to valid kuids or valid kuids ignore RPC_AUTH_UNIX and don't fill in any of the fields. Cc: "J. Bruce Fields" Cc: Trond Myklebust Signed-off-by: "Eric W. Biederman" --- fs/nfsd/nfs4xdr.c | 13 ++++++++++--- fs/nfsd/state.h | 4 ++-- 2 files changed, 12 insertions(+), 5 deletions(-) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 3812b06..2d1d06b 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -464,9 +464,16 @@ static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_ READ32(dummy); READ_BUF(dummy * 4); if (cbs->flavor == (u32)(-1)) { - cbs->uid = uid; - cbs->gid = gid; - cbs->flavor = RPC_AUTH_UNIX; + kuid_t kuid = make_kuid(&init_user_ns, uid); + kgid_t kgid = make_kgid(&init_user_ns, gid); + if (uid_valid(kuid) && gid_valid(kgid)) { + cbs->uid = kuid; + cbs->gid = kgid; + cbs->flavor = RPC_AUTH_UNIX; + } else { + dprintk("RPC_AUTH_UNIX with invalid" + "uid or gid ignoring!\n"); + } } break; case RPC_AUTH_GSS: diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index d1c229f..1a8c739 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -152,8 +152,8 @@ struct nfsd4_channel_attrs { struct nfsd4_cb_sec { u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */ - u32 uid; - u32 gid; + kuid_t uid; + kgid_t gid; }; struct nfsd4_create_session { -- 2.7.4