diff options
| author | Cong Wang <cwang@twopensource.com> | 2014-06-04 03:40:47 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-06-04 06:16:10 +0400 |
| commit | e51fb152318ee6502a2d224771b0bbbbda046128 (patch) | |
| tree | 313cc6f5be89fabea00162cf970285791c07899b /net/core | |
| parent | 9aaae044abe95de182d09004cc3fa181bf22e6e0 (diff) | |
| download | linux-e51fb152318ee6502a2d224771b0bbbbda046128.tar.xz | |
rtnetlink: fix a memory leak when ->newlink fails
It is possible that ->newlink() fails before registering
the device, in this case we should just free it, it's
safe to call free_netdev().
Fixes: commit 0e0eee2465df77bcec2 (net: correct error path in rtnl_newlink())
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/rtnetlink.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 2d8d8fcfa060..f4e9037f9a0c 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2019,11 +2019,15 @@ replay: if (ops->newlink) { err = ops->newlink(net, dev, tb, data); /* Drivers should call free_netdev() in ->destructor - * and unregister it on failure so that device could be - * finally freed in rtnl_unlock. + * and unregister it on failure after registration + * so that device could be finally freed in rtnl_unlock. */ - if (err < 0) + if (err < 0) { + /* If device is not registered at all, free it now */ + if (dev->reg_state == NETREG_UNINITIALIZED) + free_netdev(dev); goto out; + } } else { err = register_netdevice(dev); if (err < 0) { |