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Date: Mon, 14 May 2012 12:41:29 +0200 From: Samuel Iglesias Gonsalvez <siglesias@...lia.com> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Cc: Samuel Iglesias Gonsalvez <siglesias@...lia.com>, devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org Subject: [PATCH 5/5] Staging: ipack/devices/ipoctal: check for availability of helper functions in ipoctal_match() When installing the module, there could be a kernel oops due to a dereference of a NULL pointer. Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@...lia.com> --- drivers/staging/ipack/devices/ipoctal.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/staging/ipack/devices/ipoctal.c b/drivers/staging/ipack/devices/ipoctal.c index 7e370d3..df42b9b 100644 --- a/drivers/staging/ipack/devices/ipoctal.c +++ b/drivers/staging/ipack/devices/ipoctal.c @@ -799,6 +799,9 @@ static int ipoctal_match(struct ipack_device *dev) int res; unsigned char board_id; + if ((!dev->ops) || (!dev->ops->map_space) || (!dev->ops->unmap_space)) + return -ENODEV; + res = dev->ops->map_space(dev, 0, IPACK_ID_SPACE); if (res) return res; -- 1.7.10 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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