linux-kernel - Re: PATCH] debug: add notifier chain debugging

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]

Message-ID: <12c511ca0808252208n29043ab0lf9e56f94d5e4cb37@mail.gmail.com>
Date:	Mon, 25 Aug 2008 22:08:00 -0700
From:	"Tony Luck" <tony.luck@...el.com>
To:	"Arjan van de Ven" <arjan@...radead.org>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu
Subject: Re: PATCH] debug: add notifier chain debugging

>> This breaks on ia64 (and pa-risc I think) where function pointers
>> don't point directly at the code, they point to a {code,data}
>> structure which is itself located in data space, not text space.
>
> is there a way to go to the actual address? I'm sure this is a bit more
> common.... (like kallsyms!)

See dereference_function_descriptor() in lib/vsprintf.c (where it will
be clear that my memory was wrong and that PPC64 is the other
architecture that needs this).

Perhaps this needs to be moved to some place in asm-generic so
that it can be used by code like your sanity check?

-Tony
--
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/