netdev - Re: [PATCH V3 for 3.19] rtlwifi: Fix error when accessing unmapped memory in skb

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 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:	Tue, 30 Dec 2014 23:07:35 -0600
From:	Eric Biggers <ebiggers3@...il.com>
To:	Larry Finger <Larry.Finger@...inger.net>
Cc:	kvalo@...eaurora.org, linux-wireless@...r.kernel.org,
	netdev@...r.kernel.org, Stable <stable@...r.kernel.org>
Subject: Re: [PATCH V3 for 3.19]  rtlwifi: Fix error when accessing unmapped
 memory in skb

On Tue, Dec 30, 2014 at 09:33:07PM -0600, Larry Finger wrote:
> v3 - Unmap skb before trying to allocate a new one so as to not leak mapping.

Looks good to me, although I'm not sure about the handling of DMA mapping errors
(perhaps that's something that drivers typically don't even try to handle?).
Anyway, the skb allocation issue appears to be resolved now.  I am running your
patch with an extra hack to inject some occasional skb allocation failures, and
I haven't noticed any problems except dropped packets.

Eric
--
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