linux-kernel - Re: [UPDATED PATCH] fix memory corruption from misinterpreted bad_inode

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>] [day] [month] [year] [list]

Date:	Thu, 4 Jan 2007 20:23:53 +0100 (MET)
From:	Mikael Pettersson <mikpe@...uu.se>
To:	akpm@...l.org, sandeen@...hat.com
Cc:	linux-kernel@...r.kernel.org, viro@...iv.linux.org.uk
Subject: Re: [UPDATED PATCH] fix memory corruption from misinterpreted bad_inode_ops return values

On Thu, 04 Jan 2007 11:51:10 -0600, Eric Sandeen wrote:
>Also - is it ok to alias a function with one signature to a function with
>another signature?

NO!

Specific cases of type mismatches may work on many machines
(say different pointer types as long as they aren't accessed),
but in general this won't work since types affect calling conventions.
Abusing aliasing like this is exactly like casting a function
pointer to a different type that it actually has, and then invoking
it at that type: all bets are off.

Don't do this. Ever.

/Mikael
-
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/