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
| ||
|
Date: Sat, 17 May 2008 22:45:08 +0200 From: Willy Tarreau <w@....eu> To: Arjan van de Ven <arjan@...radead.org> Cc: koos vriezen <koos.vriezen@...il.com>, linux-kernel@...r.kernel.org, mchehab@...radead.org, torvalds@...ux-foundation.org Subject: Re: mplayer v4l hangs in 2.6.25.2/4 (likely regression) On Sat, May 17, 2008 at 01:20:50PM -0700, Arjan van de Ven wrote: > On Sat, 17 May 2008 22:06:12 +0200 > "koos vriezen" <koos.vriezen@...il.com> wrote: > > > 2008/5/17 Arjan van de Ven <arjan@...radead.org>: > > > > > > so.. bttv first takes "fh->cap.vb_lock" in vidiocgmbuf, then > > > > calls videobuf_mmap_setup(), and the first thing that does > > is to also take fh->cap.vb_lock! This isn't even an ABBA deadlock, > > but a straight AA deadlock :) > > > > Looks like I'm the only one actually running this code ;-) > > > > > and here is an (untest) patch that should fix this problem: > > > Koos, can you apply this to your kernel tree and report back if this > > > fixes your deadlock? > > > > patching file drivers/media/video/bt8xx/bttv-driver.c > > patching file drivers/media/video/videobuf-core.c > > Hunk #1 succeeded at 335 (offset 4 lines). > > Hunk #2 succeeded at 1093 (offset -36 lines). > > patching file include/media/videobuf-core.h > > Hunk #1 succeeded at 227 (offset -10 lines). > > > > Deadlock is gone, only mplayer fails to unmute the audio. > > that's something else entirely ;) > > I'll call your deadlock bug fixed by the patch... > > Mauro: will you send this on to Linus or should this go direct? also please do not forget to CC stable. Willy -- 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/
Powered by blists - more mailing lists