[IPV6]: Fix OOPS when using IPV6_ADDRFORM
This causes sk->sk_prot to change, which makes the socket
release free the sock into the wrong SLAB cache. Fix this
by introducing sk_prot_creator so that we always remember
where the sock came from.
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/sock.h b/include/net/sock.h
index cc4c919..77f02f8 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -141,6 +141,7 @@
* @sk_callback_lock: used with the callbacks in the end of this struct
* @sk_error_queue: rarely used
* @sk_prot: protocol handlers inside a network family
+ * @sk_prot_creator: sk_prot of original sock creator (see ipv6_setsockopt, IPV6_ADDRFORM for instance)
* @sk_err: last error
* @sk_err_soft: errors that don't cause failure but are the cause of a persistent failure not just 'timed out'
* @sk_ack_backlog: current listen backlog
@@ -218,6 +219,7 @@
} sk_backlog;
struct sk_buff_head sk_error_queue;
struct proto *sk_prot;
+ struct proto *sk_prot_creator;
rwlock_t sk_callback_lock;
int sk_err,
sk_err_soft;