diff options
| author |   WANG Cong <xiyou.wangcong@gmail.com> | 2016-07-05 22:12:36 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-07-08 23:46:37 -0400 |
| commit | 205e1e255c479f3fd77446415706463b282f94e4 (patch) | |
| tree | 98e80b94c077894fb29591ba610da272349549cd /arch | |
| parent | net: mvneta: set real interrupt per packet for tx_done (diff) | |
| download | linux-dev-205e1e255c479f3fd77446415706463b282f94e4.tar.xz linux-dev-205e1e255c479f3fd77446415706463b282f94e4.zip | |
ppp: defer netns reference release for ppp channel
Matt reported that we have a NULL pointer dereference
in ppp_pernet() from ppp_connect_channel(),
i.e. pch->chan_net is NULL.
This is due to that a parallel ppp_unregister_channel()
could happen while we are in ppp_connect_channel(), during
which pch->chan_net set to NULL. Since we need a reference
to net per channel, it makes sense to sync the refcnt
with the life time of the channel, therefore we should
release this reference when we destroy it.
Fixes: 1f461dcdd296 ("ppp: take reference on channels netns")
Reported-by: Matt Bennett <Matt.Bennett@alliedtelesis.co.nz>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linux-ppp@vger.kernel.org
Cc: Guillaume Nault <g.nault@alphalink.fr>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions