From: Tang Bin tangbin@cmss.chinamobile.com
[ Upstream commit 6ed79cec3ced6e346a10a70120fcee5f03591bab ]
The function ixp4xx_eth_probe() does not perform sufficient error checking after executing devm_ioremap_resource(), which can result in crashes if a critical error path is encountered.
Fixes: f458ac479777 ("ARM/net: ixp4xx: Pass ethernet physical base as resource") Signed-off-by: Zhang Shengju zhangshengju@cmss.chinamobile.com Signed-off-by: Tang Bin tangbin@cmss.chinamobile.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/xscale/ixp4xx_eth.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/net/ethernet/xscale/ixp4xx_eth.c +++ b/drivers/net/ethernet/xscale/ixp4xx_eth.c @@ -1387,6 +1387,8 @@ static int ixp4xx_eth_probe(struct platf return -ENODEV; regs_phys = res->start; port->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(port->regs)) + return PTR_ERR(port->regs);
switch (port->id) { case IXP4XX_ETH_NPEA: