This is a note to let you know that I've just added the patch titled
NFSD: Relocate nfsd4_decode_opaque()
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfsd-relocate-nfsd4_decode_opaque.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 2ea15b62fb5c740cd20d08d12e79e3f1dd992923
Author: Chuck Lever <chuck.lever@xxxxxxxxxx>
Date: Wed Nov 4 11:41:55 2020 -0500
NFSD: Relocate nfsd4_decode_opaque()
[ Upstream commit 5dcbfabb676b2b6d97767209cf707eb463ca232a ]
Enable nfsd4_decode_opaque() to be used in more decoders, and
replace the READ* macros in nfsd4_decode_opaque().
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 4596b8cef222c..b3459059cec1b 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -207,6 +207,33 @@ static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
return ret;
}
+
+/*
+ * NFSv4 basic data type decoders
+ */
+
+static __be32
+nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
+{
+ __be32 *p;
+ u32 len;
+
+ if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
+ return nfserr_bad_xdr;
+ if (len == 0 || len > NFS4_OPAQUE_LIMIT)
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, len);
+ if (!p)
+ return nfserr_bad_xdr;
+ o->data = svcxdr_tmpalloc(argp, len);
+ if (!o->data)
+ return nfserr_jukebox;
+ o->len = len;
+ memcpy(o->data, p, len);
+
+ return nfs_ok;
+}
+
static __be32
nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp)
{
@@ -943,22 +970,6 @@ static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
return nfserr_bad_xdr;
}
-static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
-{
- DECODE_HEAD;
-
- READ_BUF(4);
- o->len = be32_to_cpup(p++);
-
- if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
- return nfserr_bad_xdr;
-
- READ_BUF(o->len);
- SAVEMEM(o->data, o->len);
-
- DECODE_TAIL;
-}
-
static __be32
nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
{
