Revert "kcm: remove any offset before parsing messages"

This reverts commit 072222b488bc55cce92ff246bdc10115fd57d3ab.

I just read that this causes regressions.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 25 deletions

diff --git a/net/kcm/kcmsock.c b/net/kcm/kcmsock.c
index 36c438b95955..571d824e4e24 100644
--- a/net/kcm/kcmsock.c
+++ b/net/kcm/kcmsock.c
@@ -381,32 +381,8 @@ static int kcm_parse_func_strparser(struct strparser *strp, struct sk_buff *skb)
 {
         struct kcm_psock *psock = container_of(strp, struct kcm_psock, strp);
         struct bpf_prog *prog = psock->bpf_prog;
-        struct sk_buff *clone_skb = NULL;
-        struct strp_msg *stm;
-        int rc;
-
-        stm = strp_msg(skb);
-        if (stm->offset) {
-                skb = clone_skb = skb_clone(skb, GFP_ATOMIC);
-                if (!clone_skb)
-                        return -ENOMEM;
-
-                if (!pskb_pull(clone_skb, stm->offset)) {
-                        rc = -ENOMEM;
-                        goto out;
-                }
-
-                /* reset cloned skb's offset for bpf programs using it */
-                stm = strp_msg(clone_skb);
-                stm->offset = 0;
-        }
-
-        rc = (*prog->bpf_func)(skb, prog->insnsi);
-out:
-        if (clone_skb)
-                kfree_skb(clone_skb);
 
-        return rc;
+        return (*prog->bpf_func)(skb, prog->insnsi);
 }
 
 static int kcm_read_sock_done(struct strparser *strp, int err)