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Commit 57a21c1b authored by Alan Stern's avatar Alan Stern Committed by Greg Kroah-Hartman
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USB: don't try to kzalloc 0 bytes 



This patch (as907) prevents us from trying to allocate 0 bytes
when an interface has no endpoint descriptors.

Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent b89ee19a

drivers/usb/core/config.c

+6 −4
Original line number Diff line number Diff line
@@ -185,10 +185,12 @@ static int usb_parse_interface(struct device *ddev, int cfgno, 
		num_ep = USB_MAXENDPOINTS;

	}



	if (num_ep > 0) {	/* Can't allocate 0 bytes */

		len = sizeof(struct usb_host_endpoint) * num_ep;

		alt->endpoint = kzalloc(len, GFP_KERNEL);

		if (!alt->endpoint)

			return -ENOMEM;

	}



	/* Parse all the endpoint descriptors */

	n = 0;