Commit b1c2f7d1 authored by Kangjie Lu's avatar Kangjie Lu Committed by Greg Kroah-Hartman

tty: ipwireless: fix missing checks for ioremap

[ Upstream commit 1bbb1c31 ]

ipw->attr_memory and ipw->common_memory are assigned with the
return value of ioremap. ioremap may fail, but no checks
are enforced. The fix inserts the checks to avoid potential
NULL pointer dereferences.
Signed-off-by: default avatarKangjie Lu <kjlu@umn.edu>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 6673b01c
......@@ -113,6 +113,10 @@ static int ipwireless_probe(struct pcmcia_device *p_dev, void *priv_data)
ipw->common_memory = ioremap(p_dev->resource[2]->start,
resource_size(p_dev->resource[2]));
if (!ipw->common_memory) {
ret = -ENOMEM;
goto exit1;
}
if (!request_mem_region(p_dev->resource[2]->start,
resource_size(p_dev->resource[2]),
IPWIRELESS_PCCARD_NAME)) {
......@@ -133,6 +137,10 @@ static int ipwireless_probe(struct pcmcia_device *p_dev, void *priv_data)
ipw->attr_memory = ioremap(p_dev->resource[3]->start,
resource_size(p_dev->resource[3]));
if (!ipw->attr_memory) {
ret = -ENOMEM;
goto exit3;
}
if (!request_mem_region(p_dev->resource[3]->start,
resource_size(p_dev->resource[3]),
IPWIRELESS_PCCARD_NAME)) {
......
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