net: Kill skb_truesize_check(), it only catches false-positives.

A long time ago we had bugs, primarily in TCP, where we would modify
skb->truesize (for TSO queue collapsing) in ways which would corrupt
the socket memory accounting.

skb_truesize_check() was added in order to try and catch this error
more systematically.

However this debugging check has morphed into a Frankenstein of sorts
and these days it does nothing other than catch false-positives.

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

1 files changed, 0 insertions, 1 deletions

diff --git a/net/core/sock.c b/net/core/sock.c
index 6f2e1337975d..6e4f14d1ef81 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1137,7 +1137,6 @@ void sock_rfree(struct sk_buff *skb)
 {
         struct sock *sk = skb->sk;
 
-        skb_truesize_check(skb);
         atomic_sub(skb->truesize, &sk->sk_rmem_alloc);
         sk_mem_uncharge(skb->sk, skb->truesize);
 }