linux-kernel - Re: Forced unmounting for removable devices

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:	Fri, 31 Aug 2007 16:38:15 +0100
From:	Al Viro <viro@....linux.org.uk>
To:	Eduard-Gabriel Munteanu <maxdamage@...din.ro>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Forced unmounting for removable devices

On Fri, Aug 31, 2007 at 06:35:04PM +0300, Eduard-Gabriel Munteanu wrote:
> *This message was transferred with a trial version of CommuniGate(r) Pro*
> Salah Coronya wrote:
> >There are patches in -mm for revokeat()/frevoke(), which can be used to
> >implement exactly that. If a device "vanishes" (CD is removed in the
> >middle of loading, USB pend rive yanked out the middle of I/O, NFS
> >server thats gone MIA), A user-space program (maybe HAL) could iterate
> >over the open files and revoke() them, at which point the system can be
> >cleanly unmounted.

Bull.  It will not help you at all if a syscall is stuck.

> Sounds promising. Is there any glibc version that implements these 
> syscalls (googling for 'glibc' and 'frevoke' didn't help)? I'd like to 
> implement and test this on my Linux box with HAL.

Implementation that is there in -mm is broken; see discussion on the list.
-
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/