Posts
428
Following
449
Followers
349
Linux Kernel security developer, working for Microsoft. Also W7TXT. Views are my own.
Topics: #Linux #kernel #security, #amateurradio, #RF, #hamradio, #electronics, #science, #radioastronomy, #physics, #space, #arduino.

📡 https://w7txt.net/
🐧 https://blog.namei.org/
☠️ https://www.facebook.com/w7txt
jmorris

James Morris

Reply to
@glent @tylermorganwall is Jervis Bay part of the ACT? I can never remember the exact details on it.
0
0
0
jmorris

James Morris

Reply to @mcdanlj@social.makerforums.info
@mcdanlj a mill would be great but I currently have no room for one. Btw, I ended up brute force drilling the broken taps out with a solid tungsten carbide bit (which broke twice), then I was able to drill & tap for 6-32. There was enough slack in the copper spreader to handle some misalignment. The rest of the 4-40 were done very carefully with a form tap and tap magic. I’ll try the spiral flute next.
1
0
2
jmorris
repeated
bluca@fosstodon.org

bluca

Reply to @bluca@fosstodon.org

Finally, given I wasn't busy enough helping run the conference and herding cats in the main hall, and still had _some_ voice left, I also did a lightning talk on enabling PID FD support in various places:

https://www.youtube.com/watch?v=3IK5itYOOH0&list=PLWYdJViL9EioDNHn7xIqQJLyCayNPKeYf&index=27&pp=iAQB

0
2
1
jmorris

James Morris

Reply to @ai6yr@m.ai6yr.org
@ai6yr it seems to be a fairly common failure mode for these units, along with bad electrolytics and changes in some key resistors. The high voltage readings were out of whack which led to suspecting the PSU, but none of those voltages will be correct without all of the op amps etc. which depend on +/- 15v. Interestingly, all except one of the the electrolytics I removed and measured were well within spec for ESR (the outlier was ‘ok’ but not bad by any means). Says a lot about the quality of these 30 year old units (also that it still worked after I pulled it apart!)
0
0
1
jmorris

James Morris

The “2nd level of hell” starter kit for metalworking.
0
0
3
jmorris

James Morris

After many hours, including re-capping the power supply (no dice, but worthwhile in any case), and tracing through most of the upper section, I finally found the issue with this Tektronix spectrum analyzer. A tantalum cap on the horizontal storage board failed and shorted the +15v bus. Replaced it and the SA seems to be working ok so far. #hamradio #amateurradio #electronics
1
0
12
jmorris
repeated
pebenito@infosec.exchange

Chris PeBenito

Azure Boost presented by @bluca at this week's All Systems Go! conference.

Includes a bit about

https://media.ccc.de/v/all-systems-go-2023-187-microsoft-azure-boost-image-based-linux-powering-the-azure-fleet-wait-what-really-yes-

0
5
1
jmorris
repeated
kees@fosstodon.org

Kees Cook tux

Edited 1 year ago

I'm really excited about making Use-After-Free exploits much harder in the .

CONFIG_RANDOM_KMALLOC_CACHES has landed:
https://git.kernel.org/linus/3c6152940584

CONFIG_SLAB_VIRTUAL is coming:
https://lore.kernel.org/lkml/20230915105933.495735-15-matteorizzo@google.com/

2
10
3
jmorris
repeated
pid_eins@mastodon.social

Lennart Poettering

The excellent CCC VOC people published the AllSystemsGo! videos from this week. Here's the UKI talk I did there:

https://media.ccc.de/v/all-systems-go-2023-185-unified-kernel-images-ukis-

Enjoy!

1
4
0
jmorris
repeated
pid_eins@mastodon.social

Lennart Poettering

Reply to @pid_eins@mastodon.social

And here's my other talk, about TPM2 and Linux: https://media.ccc.de/v/all-systems-go-2023-186-linux-tpms

1
4
1
jmorris

James Morris

Reply to @purpleidea@mastodon.social
@purpleidea Nope, different person.
0
0
1
jmorris

James Morris

@pid_eins what's stopping you from commuting like this?

RE: https://mastodon.social/users/pid_eins/statuses/110060301906760480
0
0
1
jmorris
repeated
allsystemsgo@fosstodon.org

All Systems Go!

Day 2 talks will kick off at 9:45 Berlin-time.
As a reminder, streams for both rooms can be found here: https://streaming.media.ccc.de/asg2023
And the schedule is here: https://cfp.all-systems-go.io/all-systems-go-2023/schedule/#

0
5
0
jmorris
repeated
ASleepyWanderer@mastodon.online

Dr Laurence Datrier

It's already been 8 years since @LIGO made its first gravitational wave detection! Happy birthday GW150914!

0
2
2
jmorris

James Morris

@BayesForDays I'm trying to embrace the chaos

RE: https://lingo.lol/users/BayesForDays/statuses/111064352222933179
0
0
1
jmorris

James Morris

Reply to @gknauss@mastodon.social
@gknauss Certainly for projects which are well-funded.
0
0
0
jmorris

James Morris

@mcdanlj I'd read that spiral flute taps are weaker and more likely to break for small taps, so I haven't tried them yet. Thanks for the pointers!

RE: https://social.makerforums.info/users/mcdanlj/statuses/111060149655556379
1
0
1
jmorris

James Morris

co-signed

RE: https://mastodon.hams.social/users/kelvin0mql/statuses/111058628675406531
0
0
0
jmorris
repeated
KernelRecipes@fosstodon.org

Kernel Recipes

The start of the conference is coming very soon! in the meantime we are fine-tuning the last details and we are very very happy to see you again very soon !

0
4
2
jmorris

James Morris

Reply to @mcdanlj@social.makerforums.info
@mcdanlj I hadn't heard of that method, interesting!
1
0
1
Show older
About social.kernel.org

Terms of service

  1. Please do not use this service in violation of the Linux Kernel Code of Conduct. Doing so will result in your account suspension with the referral of the matter to the CoC committee.

  2. "Repeating"/"boosting" someone else's status on this platform will be treated as endorsement and will fall under rule #1.

  3. You are encouraged to use this platform to promote your work on the Linux Kernel, but there is no restriction on permitted topics (with the exception of anything covered by #1 above).

  4. There is no requirement to post in English, but it should be considered the primary language of communication on this platform.

Privacy notice

The admins of this service have access to all posted statuses. They aren't looking, but if it's something they shouldn't know about, then you should not post it on this platform.

Please see the Linux Foundation Privacy Policy, which applies to this platform as well.

Getting your own account

If you would like an account on this instance, please check that the following applies to you:

  • You are listed in MAINTAINERS or CREDITS

  • OR: You have a kernel.org account or email address

  • OR: You have a long and established history of involvement with the Linux Kernel

If the above is true and you agree with the Terms of Service and Privacy Notice listed above, please use these instructions to request an account: