5.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chuck Lever <chuck.lever@xxxxxxxxxx>
[ Upstream commit 547bfeb4cd8d491aabbd656d5a6f410cb4249b4e ]
Refactor for clarity.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/nfsd/nfs4xdr.c | 70 +++++++++++++++++++++++++++++------------------
1 file changed, 44 insertions(+), 26 deletions(-)
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 15535b14328e4..8c5701367e4af 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1488,12 +1488,54 @@ nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp,
return nfs_ok;
}
+/*
+ * This implementation currently does not support SP4_SSV.
+ * This decoder simply skips over these arguments.
+ */
+static noinline __be32
+nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp,
+ struct nfsd4_exchange_id *exid)
+{
+ u32 count, window, num_gss_handles;
+ __be32 status;
+
+ /* ssp_ops */
+ status = nfsd4_decode_state_protect_ops(argp, exid);
+ if (status)
+ return status;
+
+ /* ssp_hash_algs<> */
+ if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
+ return nfserr_bad_xdr;
+ while (count--) {
+ status = nfsd4_decode_ignored_string(argp, 0);
+ if (status)
+ return status;
+ }
+
+ /* ssp_encr_algs<> */
+ if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
+ return nfserr_bad_xdr;
+ while (count--) {
+ status = nfsd4_decode_ignored_string(argp, 0);
+ if (status)
+ return status;
+ }
+
+ if (xdr_stream_decode_u32(argp->xdr, &window) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0)
+ return nfserr_bad_xdr;
+
+ return nfs_ok;
+}
+
static __be32
nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
struct nfsd4_exchange_id *exid)
{
- int dummy, tmp;
DECODE_HEAD;
+ int dummy;
READ_BUF(NFS4_VERIFIER_SIZE);
COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
@@ -1517,33 +1559,9 @@ nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
return status;
break;
case SP4_SSV:
- /* ssp_ops */
- status = nfsd4_decode_state_protect_ops(argp, exid);
+ status = nfsd4_decode_ssv_sp_parms(argp, exid);
if (status)
return status;
-
- /* ssp_hash_algs<> */
- READ_BUF(4);
- tmp = be32_to_cpup(p++);
- while (tmp--) {
- READ_BUF(4);
- dummy = be32_to_cpup(p++);
- READ_BUF(dummy);
- p += XDR_QUADLEN(dummy);
- }
-
- /* ssp_encr_algs<> */
- READ_BUF(4);
- tmp = be32_to_cpup(p++);
- while (tmp--) {
- READ_BUF(4);
- dummy = be32_to_cpup(p++);
- READ_BUF(dummy);
- p += XDR_QUADLEN(dummy);
- }
-
- /* ignore ssp_window and ssp_num_gss_handles: */
- READ_BUF(8);
break;
default:
goto xdr_error;
--
2.43.0
