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net: fujitsu: fix potential null-ptr-deref
In fmvj18x_get_hwinfo(), if ioremap fails there will be NULL pointer deref. To fix this, check the return value of ioremap and return -1 to the caller in case of failure. Cc: "David S. Miller" <davem@davemloft.net> Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com> Link: https://lore.kernel.org/r/20210503115736.2104747-16-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -547,6 +547,11 @@ static int fmvj18x_get_hwinfo(struct pcmcia_device *link, u_char *node_id)
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return -1;
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base = ioremap(link->resource[2]->start, resource_size(link->resource[2]));
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if (!base) {
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pcmcia_release_window(link, link->resource[2]);
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return -1;
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}
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pcmcia_map_mem_page(link, link->resource[2], 0);
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/*
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