From 9f4d6358e11bbc7b839f9419636188e4151fb6e4 Mon Sep 17 00:00:00 2001 From: Kangjie Lu Date: Tue, 12 Mar 2019 02:16:21 -0500 Subject: net: fujitsu: fix a potential NULL pointer dereference In case ioremap fails, the fix releases the pcmcia window and returns -ENOMEM to avoid the NULL pointer dereference. Signed-off-by: Kangjie Lu Signed-off-by: David S. Miller --- drivers/net/ethernet/fujitsu/fmvj18x_cs.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/net') diff --git a/drivers/net/ethernet/fujitsu/fmvj18x_cs.c b/drivers/net/ethernet/fujitsu/fmvj18x_cs.c index a69cd19a55ae..1eca0fdb9933 100644 --- a/drivers/net/ethernet/fujitsu/fmvj18x_cs.c +++ b/drivers/net/ethernet/fujitsu/fmvj18x_cs.c @@ -547,6 +547,11 @@ static int fmvj18x_get_hwinfo(struct pcmcia_device *link, u_char *node_id) return -1; base = ioremap(link->resource[2]->start, resource_size(link->resource[2])); + if (!base) { + pcmcia_release_window(link, link->resource[2]); + return -ENOMEM; + } + pcmcia_map_mem_page(link, link->resource[2], 0); /* -- cgit v1.2.3-59-g8ed1b