Re: 2.6.27: "array subscript is above array bounds" warnings

From: Alan Stern
Date: Sat Oct 18 2008 - 11:00:28 EST

On Fri, 17 Oct 2008, Andrew Morton wrote:

> (cc's added)
> On Tue, 14 Oct 2008 22:17:36 +0200 Oliver Bock <bock@xxxxxxxxxxxxx> wrote:
> > Hi all,
> >
> > FYI, I just came across the following warnings when compiling 2.6.27
> > (release) using gcc 4.3.2 (Debian 4.3.2-1) on Debian Lenny (i386):


> > drivers/usb/core/hcd.c: In function ___usb_hcd_poll_rh_status___:
> > include/asm/string_32.h:75: warning: array subscript is above array bounds

Does this refer to the call to memcpy() in usb_hcd_poll_rh_status()?

Line 75 in string_32.h is part of the __constant_memcpy() function.
That function should not be involved here because the length argument
isn't a compile-time constant.

This has to be either a compiler bug or else a bug in the
implementation of memcpy.

Alan Stern

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