diff options
| author |   Eric W. Biederman <ebiederm@aristanetworks.com> | 2009-06-08 00:44:31 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2009-06-08 00:44:31 -0700 |
| commit | f0a4d0e5b5bfd271e6737f7c095994835b70d450 (patch) | |
| tree | a3ee9afad29dd6e01d7fe36c45ec1cca8d052ab9 /include/linux/isdn | |
| parent | e100: Fix napi_enable BUG_ON when recovering from EEH error (diff) | |
| download | linux-dev-f0a4d0e5b5bfd271e6737f7c095994835b70d450.tar.xz linux-dev-f0a4d0e5b5bfd271e6737f7c095994835b70d450.zip | |
tun: Fix unregister race
It is possible for tun_chr_close to race with dellink on the
a tun device. In which case if __tun_get runs before dellink
but dellink runs before tun_chr_close calls unregister_netdevice
we will attempt to unregister the netdevice after it is already
gone.
The two cases are already serialized on the rtnl_lock, so I have
gone for the cheap simple fix of moving rtnl_lock to cover __tun_get
in tun_chr_close. Eliminating the possibility of the tun device
being unregistered between __tun_get and unregister_netdevice in
tun_chr_close.
Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Tested-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/isdn')
0 files changed, 0 insertions, 0 deletions