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| author | Pavel Skripkin <paskripkin@gmail.com> | 2021-06-18 17:57:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-20 17:22:35 +0300 |
| commit | 17771fd4ecd648a3570f871d27b47e764b1f8e18 (patch) | |
| tree | e7cd999c5e5a18d985d5503e923b057a6b424c90 /drivers/net/ethernet | |
| parent | 0679982f51fcad6895b9844c2828d9cc2dbce9b7 (diff) | |
| download | linux-17771fd4ecd648a3570f871d27b47e764b1f8e18.tar.xz | |
net: ethernet: aeroflex: fix UAF in greth_of_remove
[ Upstream commit e3a5de6d81d8b2199935c7eb3f7d17a50a7075b7 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net/ethernet')
| -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 20bf55dbd76f..e3ca8abb14f4 100644 --- a/drivers/net/ethernet/aeroflex/greth.c +++ b/drivers/net/ethernet/aeroflex/greth.c @@ -1579,10 +1579,11 @@ 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; } |