diff options
| author | Jason Wang <jasowang@redhat.com> | 2018-05-16 20:39:33 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-19 22:43:48 +0200 |
| commit | daf0ca743b28050664c7bd03b6fb46a95d94d248 (patch) | |
| tree | 6152e4635bfb30662e5bfde108ca67b28dfdabee /include/linux/mroute6.h | |
| parent | ab75811f71815092dc4f66e283b3851dbc989b2e (diff) | |
tuntap: fix use after free during release
commit 7063efd33bb15abc0160347f89eb5aba6b7d000e upstream.
After commit b196d88aba8a ("tun: fix use after free for ptr_ring") we
need clean up tx ring during release(). But unfortunately, it tries to
do the cleanup blindly after socket were destroyed which will lead
another use-after-free. Fix this by doing the cleanup before dropping
the last reference of the socket in __tun_detach().
Backport Note :-
Upstream commit moves the ptr_ring_cleanup call from tun_chr_close to
__tun_detach. Upstream applied that patch after replacing skb_array with
ptr_ring. This patch moves the skb_array_cleanup call from
tun_chr_close to __tun_detach.
Reported-by: Andrei Vagin <avagin@virtuozzo.com>
Acked-by: Andrei Vagin <avagin@virtuozzo.com>
Fixes: b196d88aba8a ("tun: fix use after free for ptr_ring")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Zubin Mithra <zsm@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/mroute6.h')
0 files changed, 0 insertions, 0 deletions