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| author | Andy Adamson <andros@netapp.com> | 2014-06-09 15:33:20 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2014-06-24 18:46:58 -0400 |
| commit | 8445cd3528b21da77c41ad1372a944ef94d7516f (patch) | |
| tree | 1f193e7df426b3c0e389a8043727e933877fa52e /fs | |
| parent | 57bbe3d7c110fcc20a661cb814a401e4126ca590 (diff) | |
| download | linux-8445cd3528b21da77c41ad1372a944ef94d7516f.tar.gz linux-8445cd3528b21da77c41ad1372a944ef94d7516f.tar.bz2 linux-8445cd3528b21da77c41ad1372a944ef94d7516f.zip | |
NFS Return -EPERM if no supported or matching SECINFO flavor
Do not return RPC_AUTH_UNIX if SEINFO reply tests fail. This
prevents an infinite loop of NFS4ERR_WRONGSEC for non RPC_AUTH_UNIX mounts.
Without this patch, a mount with no sec= option to a server
that does not include RPC_AUTH_UNIX in the
SECINFO return can be presented with an attemtp to use RPC_AUTH_UNIX
which will result in an NFS4ERR_WRONG_SEC which will prompt the SECINFO
call which will again try RPC_AUTH_UNIX....
Signed-off-by: Andy Adamson <andros@netapp.com>
Tested-By: Steve Dickson <steved@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfs/nfs4namespace.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c index 1b86fef0b828..fd4dcb67cd15 100644 --- a/fs/nfs/nfs4namespace.c +++ b/fs/nfs/nfs4namespace.c @@ -140,10 +140,11 @@ static size_t nfs_parse_server_name(char *string, size_t len, * @flavors: List of security tuples returned by SECINFO procedure * * Return the pseudoflavor of the first security mechanism in - * "flavors" that is locally supported. Return RPC_AUTH_UNIX if - * no matching flavor is found in the array. The "flavors" array + * "flavors" that is locally supported. The "flavors" array * is searched in the order returned from the server, per RFC 3530 * recommendation. + * + * Return -EPERM if no matching flavor is found in the array. */ static rpc_authflavor_t nfs_find_best_sec(struct nfs_server *server, struct nfs4_secinfo_flavors *flavors) @@ -170,11 +171,7 @@ static rpc_authflavor_t nfs_find_best_sec(struct nfs_server *server, } } - /* if there were any sec= options then nothing matched */ - if (server->auth_info.flavor_len > 0) - return -EPERM; - - return RPC_AUTH_UNIX; + return -EPERM; } static rpc_authflavor_t nfs4_negotiate_security(struct inode *inode, struct qstr *name) |