linux-kernel - Re: alpha: potential race around hae_cache in RESTORE

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:	Sat, 25 Sep 2010 20:25:09 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	rth@...ddle.net, linux-kernel@...r.kernel.org
Subject: Re: alpha: potential race around hae_cache in RESTORE_ALL

On Sat, Sep 25, 2010 at 08:18:36PM +0100, Al Viro wrote:
> Agreed.  There are only two places that need change (return to kernel path
> in ret_from_syscall and kernel_thread essentially jumping to the same path),
> so I'll just add
> ret_to_kernel:
>         lda     $16, 7
>         call_pal PAL_swpipl
> 	br	restore_all
> and make these two places go to ret_to_kernel instead of restore_all.

BTW, am I right assuming that HAE modifications is UP-only thing?  It would
be obviously b0rken on any SMP box, since alpha_mv is not per-CPU thing...
--
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/