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path: root/fs/nfsd/nfs4xdr.c
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Diffstat (limited to 'fs/nfsd/nfs4xdr.c')
-rw-r--r--fs/nfsd/nfs4xdr.c45
1 files changed, 30 insertions, 15 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 94da8bb36c8..2cab33cc323 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -697,6 +697,23 @@ xdr_error:
return nfserr_bad_xdr;
}
+static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
+{
+ __be32 *p;
+
+ READ_BUF(4);
+ READ32(o->len);
+
+ if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
+ return nfserr_bad_xdr;
+
+ READ_BUF(o->len);
+ SAVEMEM(o->data, o->len);
+ return nfs_ok;
+xdr_error:
+ return nfserr_bad_xdr;
+}
+
static __be32
nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
{
@@ -715,13 +732,12 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
if (status)
goto xdr_error;
- READ_BUF(sizeof(clientid_t) + 4);
+ READ_BUF(sizeof(clientid_t));
COPYMEM(&open->op_clientid, sizeof(clientid_t));
- READ32(open->op_owner.len);
-
- /* owner, open_flag */
- READ_BUF(open->op_owner.len + 4);
- SAVEMEM(open->op_owner.data, open->op_owner.len);
+ status = nfsd4_decode_opaque(argp, &open->op_owner);
+ if (status)
+ goto xdr_error;
+ READ_BUF(4);
READ32(open->op_create);
switch (open->op_create) {
case NFS4_OPEN_NOCREATE:
@@ -964,12 +980,13 @@ nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclient
{
DECODE_HEAD;
- READ_BUF(12);
+ READ_BUF(8);
COPYMEM(setclientid->se_verf.data, 8);
- READ32(setclientid->se_namelen);
- READ_BUF(setclientid->se_namelen + 8);
- SAVEMEM(setclientid->se_name, setclientid->se_namelen);
+ status = nfsd4_decode_opaque(argp, &setclientid->se_name);
+ if (status)
+ return nfserr_bad_xdr;
+ READ_BUF(8);
READ32(setclientid->se_callback_prog);
READ32(setclientid->se_callback_netid_len);
@@ -1112,11 +1129,9 @@ nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
READ_BUF(NFS4_VERIFIER_SIZE);
COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
- READ_BUF(4);
- READ32(exid->clname.len);
-
- READ_BUF(exid->clname.len);
- SAVEMEM(exid->clname.data, exid->clname.len);
+ status = nfsd4_decode_opaque(argp, &exid->clname);
+ if (status)
+ return nfserr_bad_xdr;
READ_BUF(4);
READ32(exid->flags);