oss-security - CVE request kernel: flood ping cause out-of-iommu error and panic when mtu larger than 1500

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <4AD6BF10.90306@kernel.sg>
Date: Thu, 15 Oct 2009 14:20:00 +0800
From: Eugene Teo <eugeneteo@...nel.sg>
To: oss-security@...ts.openwall.com
CC: "Steven M. Christey" <coley@...us.mitre.org>
Subject: CVE request kernel: flood ping cause out-of-iommu error and panic
 when mtu larger than 1500

Executing ping -f -s 3000 IP in a certain network setup could trigger an 
out-of-IOMMU error, leading to a denial of service.

Steps to reproduce the issue:
https://bugzilla.redhat.com/show_bug.cgi?id=529137#c0

Triggering the issue would result in:
PCI-DMA: Out of IOMMU space for 7222 bytes at device 0000:03:00.0
PCI-DMA: Out of IOMMU space for 7222 bytes at device 0000:03:00.0
<Repeated Many Many Times>
PCI-DMA: Out of IOMMU space for 7222 bytes at device 0000:03:00.0
PCI-DMA: Out of IOMMU space for 7222 bytes at device 0000:03:00.0

HARDWARE ERROR
CPU 0: Machine Check Exception:                7 Bank 4: bc0000000005001b
RIP 10:<ffffffff8006b2b0> {default_idle+0x29/0x50}
TSC 10116da2355 ADDR 4000000 MISC c008000001000000
This is not a software problem!
Run through mcelog --ascii to decode and contact your hardware vendor
Kernel panic - not syncing: Uncorrected machine check
  <7>APIC error on CPU2: 00(08)

Upstream commits:
http://git.kernel.org/linus/a866bbf6aacf95f849810079442a20be118ce905
http://git.kernel.org/linus/97d477a914b146e7e6722ded21afa79886ae8ccd

References:
http://bugzilla.kernel.org/show_bug.cgi?id=9468
https://bugzilla.redhat.com/show_bug.cgi?id=529137

Thanks, Eugene

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.