netdev - Re: caif: Fix napi poll list corruption

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, 22 Dec 2014 16:35:00 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	jasowang@...hat.com, david.vrabel@...rix.com,
	netdev@...r.kernel.org, xen-devel@...ts.xenproject.org,
	konrad.wilk@...cle.com, boris.ostrovsky@...cle.com,
	edumazet@...gle.com
Subject: Re: caif: Fix napi poll list corruption

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Mon, 22 Dec 2014 20:35:25 +1100

> The commit d75b1ade567ffab085e8adbbdacf0092d10cd09c (net: less
> interrupt masking in NAPI) breaks caif.
> 
> It is now required that if the entire budget is consumed when poll
> returns, the napi poll_list must remain empty.  However, like some
> other drivers caif tries to do a last-ditch check and if there is
> more work it will call napi_schedule and then immediately process
> some of this new work.  Should the entire budget be consumed while
> processing such new work then we will violate the new caller
> contract.
> 
> This patch fixes this by not touching any work when we reschedule
> in caif.
> 
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

Applied, thanks.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html