linux-kernel - Re: 2.6.24-rc5 "videobuf_read_start" [drivers/media/video/videobuf-dvb.ko] undefined!

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:	Wed, 12 Dec 2007 08:51:24 -0200
From:	Mauro Carvalho Chehab <mchehab@...radead.org>
To:	Shane <gnome42@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	video4linux-list <video4linux-list@...hat.com>,
	Soeren Sonnenburg <kernel@....de>
Subject: Re: 2.6.24-rc5 "videobuf_read_start"
	[drivers/media/video/videobuf-dvb.ko] undefined!


Em Qua, 2007-12-12 às 00:20 -0500, Shane escreveu:
> In 2.6.24-rc5+, I hit this problem with videobuf_read_start
> not being exported. Patch attached, only compile tested.
> 
>   CHK     include/linux/version.h
>   CHK     include/linux/utsrelease.h
>   CALL    scripts/checksyscalls.sh
>   CHK     include/linux/compile.h
>   CC [M]  drivers/media/video/videobuf-core.o
>   Building modules, stage 2.
> Kernel: arch/x86/boot/bzImage is ready  (#1)
>   MODPOST 202 modules
> ERROR: "videobuf_read_start" [drivers/media/video/videobuf-dvb.ko] undefined!
> make[1]: *** [__modpost] Error 1
> make: *** [modules] Error 2
Thanks for reporting.

The patch is incomplete. I've just sent Linus the complete fix for this.

The issue here is that videobuf_read_start were replaced by
__videobuf_read_start, but mutex is missing at the last.

The patch I've just sent adds a mutex-safe version of
videobuf_read_start, adding the proper EXPORT_SYMBOL_GPL().
 
Cheers,
Mauro

--
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/