diff options
| author | Pavel Skripkin <paskripkin@gmail.com> | 2021-06-18 17:57:31 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-19 21:45:10 +0300 |
| commit | e3a5de6d81d8b2199935c7eb3f7d17a50a7075b7 (patch) | |
| tree | 9e2d776ac1c45651fab21d1e238ca17320c1e142 /drivers/net/ethernet/aeroflex | |
| parent | 9ed13a17e38e0537e24d9b507645002bf8d0201f (diff) | |
| download | linux-e3a5de6d81d8b2199935c7eb3f7d17a50a7075b7.tar.xz | |
net: ethernet: aeroflex: fix UAF in greth_of_remove
static int greth_of_remove(struct platform_device *of_dev)
{
...
struct greth_private *greth = netdev_priv(ndev);
...
unregister_netdev(ndev);
free_netdev(ndev);
of_iounmap(&of_dev->resource[0], greth->regs, resource_size(&of_dev->resource[0]));
...
}
greth is netdev private data, but it is used
after free_netdev(). It can cause use-after-free when accessing greth
pointer. So, fix it by moving free_netdev() after of_iounmap()
call.
Fixes: d4c41139df6e ("net: Add Aeroflex Gaisler 10/100/1G Ethernet MAC driver")
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/aeroflex')
| -rw-r--r-- | drivers/net/ethernet/aeroflex/greth.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/aeroflex/greth.c b/drivers/net/ethernet/aeroflex/greth.c index d77fafbc1530..c560ad06f0be 100644 --- a/drivers/net/ethernet/aeroflex/greth.c +++ b/drivers/net/ethernet/aeroflex/greth.c @@ -1539,10 +1539,11 @@ static int greth_of_remove(struct platform_device *of_dev) mdiobus_unregister(greth->mdio); unregister_netdev(ndev); - free_netdev(ndev); of_iounmap(&of_dev->resource[0], greth->regs, resource_size(&of_dev->resource[0])); + free_netdev(ndev); + return 0; } |