Re: [RESEND][PATCH] gen_init_cpio: avoid stack overflow whenexpanding

[Andrew Morton]

On Wed, 24 Oct 2012 13:57:56 -0700
Kees Cook <keescook@xxxxxxxxxxxx> wrote:

> Fix possible overflow of the buffer used for expanding environment
> variables when building file list.
> 
> $ cat usr/crash.list
> file foo ${BIG}${BIG}${BIG}${BIG}${BIG}${BIG} 0755 0 0
> $ BIG=$(perl -e 'print "A" x 4096;') ./usr/gen_init_cpio usr/crash.list
> *** buffer overflow detected ***: ./usr/gen_init_cpio terminated
> 
> This also replaces the space-indenting with tabs.
> 
> Patch based on existing fix extracted from grsecurity.
> 
> ...
>
> Cc: stable@xxxxxxxxxxxxxxx

Why did you feel we need to backport this to -stable?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/