linux-kernel - Re: [PATCH] Fix trivial unwind info bug

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 01 Aug 2006 00:52:32 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	armbru@...hat.com (Markus Armbruster), ak@...e.de
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix trivial unwind info bug

Markus Armbruster <armbru@...hat.com> wrote:
> CFA needs to be adjusted upwards for push, and downwards for pop.
> arch/i386/kernel/entry.S gets it wrong in one place.
> 
> Signed-off-by: Markus Armbruster <armbru@...hat.com>

Thanks for the patch Markus.  Andi Kleen is now maintaining i386
so please cc him in future for i386 patches.

> diff --git a/arch/i386/kernel/entry.S b/arch/i386/kernel/entry.S
> index d9a260f..37a7d2e 100644
> --- a/arch/i386/kernel/entry.S
> +++ b/arch/i386/kernel/entry.S
> @@ -204,7 +204,7 @@ #define RING0_PTREGS_FRAME \
> ENTRY(ret_from_fork)
>        CFI_STARTPROC
>        pushl %eax
> -       CFI_ADJUST_CFA_OFFSET -4
> +       CFI_ADJUST_CFA_OFFSET 4
>        call schedule_tail
>        GET_THREAD_INFO(%ebp)
>        popl %eax

I wonder if this is related to the problem of dump_stack() crashing...

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/