linux-kernel - Re: [PATCH][RFC] HPFS: Don't use pointer to out-of-scope array

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Date:	Fri, 24 Dec 2010 21:45:09 +0100
From:	Andreas Schwab <schwab@...ux-m68k.org>
To:	Jesper Juhl <jj@...osbits.net>
Cc:	linux-kernel@...r.kernel.org,
	Mikulas Patocka <mikulas@...ax.karlin.mff.cuni.cz>
Subject: Re: [PATCH][RFC] HPFS: Don't use pointer to out-of-scope array

Jesper Juhl <jj@...osbits.net> writes:

> Secondly I fail to see how this code inside the while loop can even work:
>
>   if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 1 + (ea->indirect ? 8 : 0), ex + 4))
>
> There is nothing initializing 'ex' which 'ea' points to, so 
> 'ea->namelen' and 'ea->indirect' are uninitialized.

The preceding hpfs_ea_read should do it (it reads the first 4 bytes of
ex which aliases ea->namelen and ea->indirect).

Andreas.

-- 
Andreas Schwab, schwab@...ux-m68k.org
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