From: Dave Wysochanski <dwysocha@redhat.com>
To: linux-nfs@vger.kernel.org
Subject: [PATCH 1/2] SUNRPC: Move simple_get_bytes and simple_get_netobj into xdr.h
Date: Tue, 5 Jan 2021 17:06:33 -0500 [thread overview]
Message-ID: <20210105220634.27910-2-dwysocha@redhat.com> (raw)
In-Reply-To: <20210105220634.27910-1-dwysocha@redhat.com>
Remove duplicated helper functions to parse opaque XDR objects
and place inside the xdr.h file. Also update comment which
is wrong since lockd is not the only user of xdr_netobj.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
---
include/linux/sunrpc/xdr.h | 33 +++++++++++++++++++++++++++--
net/sunrpc/auth_gss/auth_gss.c | 29 -------------------------
net/sunrpc/auth_gss/gss_krb5_mech.c | 29 -------------------------
3 files changed, 31 insertions(+), 60 deletions(-)
diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h
index 19b6dea27367..8ef788ff80b9 100644
--- a/include/linux/sunrpc/xdr.h
+++ b/include/linux/sunrpc/xdr.h
@@ -25,8 +25,7 @@ struct rpc_rqst;
#define XDR_QUADLEN(l) (((l) + 3) >> 2)
/*
- * Generic opaque `network object.' At the kernel level, this type
- * is used only by lockd.
+ * Generic opaque `network object.'
*/
#define XDR_MAX_NETOBJ 1024
struct xdr_netobj {
@@ -34,6 +33,36 @@ struct xdr_netobj {
u8 * data;
};
+static inline const void *
+simple_get_bytes(const void *p, const void *end, void *res, size_t len)
+{
+ const void *q = (const void *)((const char *)p + len);
+ if (unlikely(q > end || q < p))
+ return ERR_PTR(-EFAULT);
+ memcpy(res, p, len);
+ return q;
+}
+
+static inline const void *
+simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest)
+{
+ const void *q;
+ unsigned int len;
+
+ p = simple_get_bytes(p, end, &len, sizeof(len));
+ if (IS_ERR(p))
+ return p;
+ q = (const void *)((const char *)p + len);
+ if (unlikely(q > end || q < p))
+ return ERR_PTR(-EFAULT);
+ dest->data = kmemdup(p, len, GFP_NOFS);
+ if (unlikely(dest->data == NULL))
+ return ERR_PTR(-ENOMEM);
+ dest->len = len;
+ return q;
+}
+
+
/*
* Basic structure for transmission/reception of a client XDR message.
* Features a header (for a linear buffer containing RPC headers
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 4ecc2a959567..228456b22b23 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -125,35 +125,6 @@ gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx)
clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags);
}
-static const void *
-simple_get_bytes(const void *p, const void *end, void *res, size_t len)
-{
- const void *q = (const void *)((const char *)p + len);
- if (unlikely(q > end || q < p))
- return ERR_PTR(-EFAULT);
- memcpy(res, p, len);
- return q;
-}
-
-static inline const void *
-simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest)
-{
- const void *q;
- unsigned int len;
-
- p = simple_get_bytes(p, end, &len, sizeof(len));
- if (IS_ERR(p))
- return p;
- q = (const void *)((const char *)p + len);
- if (unlikely(q > end || q < p))
- return ERR_PTR(-EFAULT);
- dest->data = kmemdup(p, len, GFP_NOFS);
- if (unlikely(dest->data == NULL))
- return ERR_PTR(-ENOMEM);
- dest->len = len;
- return q;
-}
-
static struct gss_cl_ctx *
gss_cred_get_ctx(struct rpc_cred *cred)
{
diff --git a/net/sunrpc/auth_gss/gss_krb5_mech.c b/net/sunrpc/auth_gss/gss_krb5_mech.c
index ae9acf3a7389..99ea36d5eefe 100644
--- a/net/sunrpc/auth_gss/gss_krb5_mech.c
+++ b/net/sunrpc/auth_gss/gss_krb5_mech.c
@@ -143,35 +143,6 @@ get_gss_krb5_enctype(int etype)
return NULL;
}
-static const void *
-simple_get_bytes(const void *p, const void *end, void *res, int len)
-{
- const void *q = (const void *)((const char *)p + len);
- if (unlikely(q > end || q < p))
- return ERR_PTR(-EFAULT);
- memcpy(res, p, len);
- return q;
-}
-
-static const void *
-simple_get_netobj(const void *p, const void *end, struct xdr_netobj *res)
-{
- const void *q;
- unsigned int len;
-
- p = simple_get_bytes(p, end, &len, sizeof(len));
- if (IS_ERR(p))
- return p;
- q = (const void *)((const char *)p + len);
- if (unlikely(q > end || q < p))
- return ERR_PTR(-EFAULT);
- res->data = kmemdup(p, len, GFP_NOFS);
- if (unlikely(res->data == NULL))
- return ERR_PTR(-ENOMEM);
- res->len = len;
- return q;
-}
-
static inline const void *
get_key(const void *p, const void *end,
struct krb5_ctx *ctx, struct crypto_sync_skcipher **res)
--
2.25.2
next prev parent reply other threads:[~2021-01-05 22:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-05 22:06 [PATCH 0/2] Fix crash in trace_rpcgss_context due to 0-length acceptor Dave Wysochanski
2021-01-05 22:06 ` Dave Wysochanski [this message]
2021-01-05 22:06 ` [PATCH 2/2] SUNRPC: Handle 0 length opaque XDR object data properly Dave Wysochanski
2021-01-21 15:22 ` David Wysochanski
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