Commit 44822df8 authored by Ma Ke's avatar Ma Ke Committed by Dominik Brodowski
Browse files

pcmcia: Fix a NULL pointer dereference in __iodyn_find_io_region() 



In __iodyn_find_io_region(), pcmcia_make_resource() is assigned to
res and used in pci_bus_alloc_resource(). There is a dereference of res
in pci_bus_alloc_resource(), which could lead to a NULL pointer
dereference on failure of pcmcia_make_resource().

Fix this bug by adding a check of res.

Cc: stable@vger.kernel.org
Fixes: 49b1153a ("pcmcia: move all pcmcia_resource_ops providers into one module")
Signed-off-by: default avatarMa Ke <make24@iscas.ac.cn>
Signed-off-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
parent d1dfcdd3

drivers/pcmcia/rsrc_iodyn.c

+3 −0
Original line number Diff line number Diff line
@@ -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;