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[IPV6]: Fix OOPS when using IPV6_ADDRFORM

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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>
This commit is contained in:
Arnaldo Carvalho de Melo 2005-05-05 13:35:15 -07:00 • committed by David S. Miller
commit 476e19cfa1
2 changed files with 10 additions and 4 deletions
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2
include/net/sock.h
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@ -141,6 +141,7 @@ struct sock_common {
* @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 @@ struct sock {
} 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;