[PATCH RESEND] pcmcia: fix a potential null pointer dereference in __iodyn_find_io_region()

Add check for the return value of pcmcia_make_resource() to prevent null pointer dereference.

Fixes: 49b1153adfe1 ("pcmcia: move all pcmcia_resource_ops providers into one module") Cc: stable@vger.kernel.org Signed-off-by: Haoxiang Li haoxiang_li2024@163.com --- drivers/pcmcia/rsrc_iodyn.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/pcmcia/rsrc_iodyn.c b/drivers/pcmcia/rsrc_iodyn.c index b04b16496b0c..2677b577c1f8 100644 --- a/drivers/pcmcia/rsrc_iodyn.c +++ b/drivers/pcmcia/rsrc_iodyn.c @@ -62,6 +62,9 @@ static struct resource *__iodyn_find_io_region(struct pcmcia_socket *s, unsigned long min = base; int ret;

+ if (!res) + return NULL; + data.mask = align - 1; data.offset = base & data.mask;