[PATCH net v2 0/2] add support for skb with sk ref cloning

changes v2:
- drop mac80211 patch for now, it can go separately if needed

Hello,

this series tries to fix a long standing problem in the CAN echo SKB
handling. The problem shows up if an echo SKB for a SKB that references
an already closed socket is created.

It looks like the mac80211/tx.c has the same problem, see RFC patch 3
for details.

regards,
Oleksij

Oleksij Rempel (2):
  skbuff: skb_clone_sk_optional(): add function to always clone a skb
    and increase refcount on sk if valid
  can: fix ref count warning if socket was closed before skb was cloned

 include/linux/can/skb.h   |  3 +--
 include/linux/skbuff.h    |  1 +
 net/can/af_can.c          |  6 +++---
 net/can/j1939/main.c      |  3 +--
 net/can/j1939/socket.c    |  3 +--
 net/can/j1939/transport.c |  4 +---
 net/core/skbuff.c         | 27 +++++++++++++++++++++++++++
 7 files changed, 35 insertions(+), 12 deletions(-)

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2.29.2