linux-kernel - Re: [PATCH] Use ERESTARTNOHAND if poll() is interrupted by a signal

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:	Mon, 30 Jul 2007 16:59:35 -0700
From:	Chris Wright <chrisw@...s-sol.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Manfred Spraul <manfred@...orfullife.com>,
	linux-kernel@...r.kernel.org, Oleg Nesterov <oleg@...sign.ru>,
	Roland McGrath <roland@...hat.com>
Subject: Re: [PATCH] Use ERESTARTNOHAND if poll() is interrupted by a signal

* Andrew Morton (akpm@...ux-foundation.org) wrote:
> On Sun, 29 Jul 2007 19:05:05 +0200 Manfred Spraul <manfred@...orfullife.com> wrote:
> > poll() returns -EINTR if a signal is pending.
> > EINTR is a bad choice: it means that poll returns to user space if the
> > task is stopped by SIGSTOP/SIGCONT or by the freezer.
> > select() and ppoll() both use ERESTARTNOHAND, this avoids a return to
> > user space for signals that are handled by the kernel.
> > 
> > The patch switches poll() to ERESTARTNOHAND.
> > Tested with FC6. Patch against 2.6.23-rc1-mm1.
> 
> hm.  Is this a fix against
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc1/2.6.23-rc1-mm1/broken-out/do_poll-return-eintr-when-signalled.patch
> only, or does mainline also need fixing?

Mainline has same issue (although fix is certainly a bit different w/out
Oleg's patch).
-
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/