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] [day] [month] [year] [list]
Date:	Fri, 22 Aug 2014 09:00:50 +0000
From:	David Laight <David.Laight@...LAB.COM>
To:	'Venkat Venkatsubra' <venkat.x.venkatsubra@...cle.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: order:1 failure in ipoib_cm_alloc_rx_skb

From: Venkat Venkatsubra
> Hello All,
> 
> Many of our customers have hit this order:1 failure in ipoib_cm_alloc_rx_skb causing softlockup:
> ....
>         skb = dev_alloc_skb(IPOIB_CM_HEAD_SIZE + 12);
> ....

Notwithstanding any other problems, that allocation could fail even if the size were
small enough that the entire skb would fit in one page.
So the driver needs changing so that the allocation failure doesn't cause a deadlock.

OTOH if you can't allocate 8k of contiguous address space and memory the system
is unlikely to be working very well at all.

	David



--
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

Powered by blists - more mailing lists