USB HID: fix a possible NULL pointer dereference when we fail to allocate memory

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If, in usb_hid_configure(), we fail to allocate storage for 'usbhid',
 "if (!(usbhid = kzalloc(sizeof(struct usbhid_device), GFP_KERNEL)))",
then we'll jump to the 'fail:' label where we have this code:
        usb_free_urb(usbhid->urbin);
        usb_free_urb(usbhid->urbout);
        usb_free_urb(usbhid->urbctrl);
Since we got here because we couldn't allocate storage for 'usbhid',
what we have here is a NULL pointer dereference - ouch...

This patch solves that little problem by adding a new
'fail_no_usbhid:' label after the problematic calls to
usb_free_urb() and jumps to that one instead, in the problem case.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

...

This commit is contained in:

Jesper Juhl 2007-07-30 15:15:26 +02:00 • committed by Jiri Kosina

parent 04a9b7ffce

commit de1a7b0328

1 changed files with 2 additions and 1 deletions

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drivers/hid/usbhid/hid-core.c

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