Re: [PATCH net-next v2 02/16] l2tp: add RCU read lock to protect tunnel ptr in ip socket destroy
flat view
From: David Miller <davem@davemloft.net>
Date: 2018-02-12 16:22:10
From: James Chapman <jchapman@katalix.com> Date: Mon, 12 Feb 2018 10:11:06 +0000
If an L2TPIP socket is closed, add RCU protection when we deref
sk_user_data to prevent races with another thread closing the same
tunnel.
Fixes: 0d76751fad ("l2tp: Add L2TPv3 IP encapsulation (no UDP) support")Another patch with no signoff, and:
refcount_t: increment on 0; use-after-free. WARNING: CPU: 2 PID: 2892 at lib/refcount.c:153 refcount_inc+0x2b/0x30 Modules linked in: CPU: 2 PID: 2892 Comm: pppol2tp_chaos Not tainted 4.15.0-rc9+ #1
... a kernel log dump which should be in the commit message body.