linux-kernel - Re: [PATCH] 8250: Fix oops from setserial

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: <20090529205429.c9c73b19.akpm@linux-foundation.org>
Date:	Fri, 29 May 2009 20:54:29 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	vvscore@...il.com
Subject: Re: [PATCH] 8250: Fix oops from setserial

On Thu, 28 May 2009 14:01:35 +0100 Alan Cox <alan@...rguk.ukuu.org.uk> wrote:

> From: Alan Cox <alan@...ux.intel.com>
> 
> [Impact: ok I just put this here to wind up Linus]
> 
> If you setserial a port which has never been initialised we change the type
> but don't update the I/O method pointers. The same problem is true if you
> change the io type of a port - but nobody ever does that so nobody noticed!
> 
> Remember the old type and when attaching if the type has changed reload the
> port accessor pointers. We can't do it blindly as some 8250 drivers load custom
> accessors and we must not stomp those.
> 
> Closes-bug: #13367

Please quote the full bug URL.

a) for consistency

b) because there are multiple bug tracking systems out there:

y:/usr/src/git26> git-log|grep bugzilla.redhat|wc -l
123

>  static void set_io_from_upio(struct uart_port *p)
>  {
> +	struct uart_8250_port *up = (struct uart_8250_port *)p;

container_of() is nicer, IMO.  It's clearer, and doesn't require that
the uart_port be the fist member.

--
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/