diff options
| author | yangerkun <yangerkun@huawei.com> | 2020-02-28 21:40:48 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-11 07:53:07 +0100 |
| commit | e7fe43afa869bc5931d046707b872fdc19946bf3 (patch) | |
| tree | fb007316919be5238434263a15e05211378c327c /drivers | |
| parent | 24d85373578acb9566852a0e094ff33e71b5a924 (diff) | |
slip: stop double free sl->dev in slip_open
After include 3b5a39979daf ("slip: Fix memory leak in slip_open error path")
and e58c19124189 ("slip: Fix use-after-free Read in slip_open") with 4.4.y/4.9.y.
We will trigger a bug since we can double free sl->dev in slip_open. Actually,
we should backport cf124db566e6 ("net: Fix inconsistent teardown and release
of private netdev state.") too since it has delete free_netdev from sl_free_netdev.
Fix it by delete free_netdev from slip_open.
Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/slip/slip.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c index 2af09c3851a5..cc841126147e 100644 --- a/drivers/net/slip/slip.c +++ b/drivers/net/slip/slip.c @@ -868,7 +868,6 @@ err_free_chan: tty->disc_data = NULL; clear_bit(SLF_INUSE, &sl->flags); sl_free_netdev(sl->dev); - free_netdev(sl->dev); err_exit: rtnl_unlock(); |