Re: [stable-ish 9] Dell R815 ipmi(4) attach failure

2012-04-04 Thread John Baldwin
On Wednesday, April 04, 2012 12:24:33 pm Doug Ambrisko wrote: > John Baldwin writes: > | On Tuesday, April 03, 2012 12:37:50 pm Doug Ambrisko wrote: > | > John Baldwin writes: > | > | On Monday, April 02, 2012 7:27:13 pm Doug Ambrisko wrote: > | > | > Doug Ambrisko writes: > | > | > | John Baldwin

Re: Text relocations in kernel modules

2012-04-04 Thread jb
Peter Wemm wemm.org> writes: > ... > 5) If you own the machine's kernel, you can hide anything you wish. > Relocations are not a factor in this. > OK. Thanks a lot guys for sharing your answers and time. It was quite interesting. jb ___ freebsd-stab

Re: Text relocations in kernel modules

2012-04-04 Thread Peter Wemm
On Wed, Apr 4, 2012 at 10:34 AM, jb wrote: > Peter Wemm wemm.org> writes: > >> ... >> There is no way to interfere because it is done outside of user space >> entirely, **after** the file has been copied out of the file system. >> You can do whatever you like to the file, but it has no effect bec

Re: Text relocations in kernel modules

2012-04-04 Thread Shawn Webb
If there is malicious code in a kernel module, then discussions of relocations become moot. Sent from my Android 4.0 device. Please forgive any spelling or grammatical errors. On Apr 4, 2012 11:35 AM, "jb" wrote: > Peter Wemm wemm.org> writes: > > > ... > > There is no way to interfere because

Re: Text relocations in kernel modules

2012-04-04 Thread jb
Peter Wemm wemm.org> writes: > ... > There is no way to interfere because it is done outside of user space > entirely, **after** the file has been copied out of the file system. > You can do whatever you like to the file, but it has no effect because > all the relocation is done in a private kern

Re: Text relocations in kernel modules

2012-04-04 Thread Peter Wemm
On Wed, Apr 4, 2012 at 8:58 AM, Ian Lepore wrote: [..] > This whole relocation question is just a big red herring.  The kernel > loader relocating a kernel module at load time does not open any > opportunity for userland code to launch an attack on the memory pages > into which the module gets loa

Re: [stable-ish 9] Dell R815 ipmi(4) attach failure

2012-04-04 Thread Doug Ambrisko
John Baldwin writes: | On Tuesday, April 03, 2012 12:37:50 pm Doug Ambrisko wrote: | > John Baldwin writes: | > | On Monday, April 02, 2012 7:27:13 pm Doug Ambrisko wrote: | > | > Doug Ambrisko writes: | > | > | John Baldwin writes: | > | > | | On Saturday, March 31, 2012 3:25:48 pm Doug Ambrisko w

Re: Text relocations in kernel modules

2012-04-04 Thread Peter Wemm
On Wed, Apr 4, 2012 at 8:05 AM, jb wrote: > Ian Lepore damnhippie.dyndns.org> writes: > >> ... >> > But of interest to me is this: >> > "... >> > Text relocations are a way in which references in the executable code to >> > addresses not known at link time are solved. Basically they just write >>

Re: Text relocations in kernel modules

2012-04-04 Thread Peter Wemm
On Wed, Apr 4, 2012 at 1:38 AM, jb wrote: >   pobox.com> writes: > >> ... >> You can appeal to authority by saying the Gentoo Hardened developers said >> such-and-such all you want, but it would be more useful for you to be able >> to make specific technical arguments yourself. Saying "it could be

Compatibility with the new XEON Processors

2012-04-04 Thread Efraín Déctor
Hello. Does anyone know if FreeBSD 8.2 and FreeBSD 9.1 are fully compatible with this processor: Intel XEON E3 1270 ?. Thank you. ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send

Re: Text relocations in kernel modules

2012-04-04 Thread Ian Lepore
On Wed, 2012-04-04 at 15:05 +, jb wrote: > Ian Lepore damnhippie.dyndns.org> writes: > > > ... > > > But of interest to me is this: > > > "... > > > Text relocations are a way in which references in the executable code to > > > addresses not known at link time are solved. Basically they just

Re: Text relocations in kernel modules

2012-04-04 Thread Mike Pumford
jb wrote: From the point of view of an attacker it does not matter whether kernel module is loaded and linked once only. That's enough to create a window of opportunity for interfering with relocation process and modifying text (code). Well yes but said attacker has to be able to modify KERNEL

Re: 157k interrupts per second causing 60% CPU load on idle system

2012-04-04 Thread Freddie Cash
On Wed, Apr 4, 2012 at 5:19 AM, Matt Thyer wrote: > So it seems that both the old and new mps driver have a problem with the > Western Digital WD20EARX SATA 3 drive on a SuperMicro AOC-USAS2-L8i (SAS > 6G) controller (flashed with -IT firmware). I wouldn't say the driver has a problem with that s

Re: Text relocations in kernel modules

2012-04-04 Thread jb
Ian Lepore damnhippie.dyndns.org> writes: > ... > > But of interest to me is this: > > "... > > Text relocations are a way in which references in the executable code to > > addresses not known at link time are solved. Basically they just write > > the appropriate address at runtime marking the co

Re: Text relocations in kernel modules

2012-04-04 Thread Ian Lepore
On Wed, 2012-04-04 at 08:38 +, jb wrote: > pobox.com> writes: > > > ... > > You can appeal to authority by saying the Gentoo Hardened developers said > > such-and-such all you want, but it would be more useful for you to be able > > to make specific technical arguments yourself. Saying "it c

RE: 157k interrupts per second causing 60% CPU load on idle system

2012-04-04 Thread Desai, Kashyap
Matt, Sorry for addressing to wrong person.! I am working in Device Driver group and it difficult to track request coming through emails. We can solve those request through emails which are minor/medium in complexity. There are some group in LSI which has expertise to root cause issue and provid

Re: 157k interrupts per second causing 60% CPU load on idle system

2012-04-04 Thread Matt Thyer
On 4 April 2012 21:55, Desai, Kashyap wrote: > Mike, > Have your purchase LSI controller through Channel or OEM ? > It would be a difficult for developers to help you without any support > channel invovoled ? > If possible can you contact LSI support channel ? > Kashyap, It's me, Matt, not Mike

RE: 157k interrupts per second causing 60% CPU load on idle system

2012-04-04 Thread Desai, Kashyap
> -Original Message- > From: owner-freebsd-sta...@freebsd.org [mailto:owner-freebsd- > sta...@freebsd.org] On Behalf Of Matt Thyer > Sent: Wednesday, April 04, 2012 5:50 PM > To: Mike Tancsa > Cc: freebsd-stable@freebsd.org > Subject: Re: 157k interrupts per second causing 60% CPU load on

Re: 157k interrupts per second causing 60% CPU load on idle system

2012-04-04 Thread Matt Thyer
On 25 March 2012 22:26, Matt Thyer wrote: > > Does anyone know if and when this driver was merged from current to > 8-STABLE ? > > If I can work out what revision that occurred in I'll go back to just > before then to confirm if the problem exists. > In the -CURRENT list I've been told that the

Re: [stable-ish 9] Dell R815 ipmi(4) attach failure

2012-04-04 Thread John Baldwin
On Tuesday, April 03, 2012 12:37:50 pm Doug Ambrisko wrote: > John Baldwin writes: > | On Monday, April 02, 2012 7:27:13 pm Doug Ambrisko wrote: > | > Doug Ambrisko writes: > | > | John Baldwin writes: > | > | | On Saturday, March 31, 2012 3:25:48 pm Doug Ambrisko wrote: > | > | | > Sean Bruno writ

Re: Text relocations in kernel modules

2012-04-04 Thread jb
pobox.com> writes: > ... > You can appeal to authority by saying the Gentoo Hardened developers said > such-and-such all you want, but it would be more useful for you to be able > to make specific technical arguments yourself. Saying "it could be a > problem" or "in the wild there may be" isn't