From 57a21c1b929450b1e020c0a03cca6fa7448f4222 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Tue, 15 May 2007 17:40:37 -0400 Subject: [PATCH] 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: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/config.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c index bfb3731d42db..2d4fd530e5e4 100644 --- a/drivers/usb/core/config.c +++ b/drivers/usb/core/config.c @@ -185,10 +185,12 @@ static int usb_parse_interface(struct device *ddev, int cfgno, num_ep = USB_MAXENDPOINTS; } - len = sizeof(struct usb_host_endpoint) * num_ep; - alt->endpoint = kzalloc(len, GFP_KERNEL); - if (!alt->endpoint) - return -ENOMEM; + 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; -- 2.20.1