Posts in "Technology"

Reddit pop ups

If you use reddit at all you’ve probably started to notice the slow erosion of the site by capitalism. Going public means chasing infinite profits as the only goal and recently they’ve gotten rather aggressive about site breaking pop ups demanding you login to look at a post or conversation. Unfortunately there’s a lot of niche subreddits there with good content still and no competitor has taken off yet but I would guess it’s coming soon as reddit goes down the path of Digg.

Anyway if you have ublock origin this removes all that crap, just add it as a custom filter

reddit.com##.p-lg.justify-center.items-center.flex-col.w-1\/2.flex
reddit.com##.rpl-bottom-sheet
reddit.com##.w-\[720px\].min-h-\[480px\].flex
reddit.com###blocking-modal:remove()
reddit.com###desktop-dynamic-upsell-dialog:remove()
reddit.com##body:style(pointer-events: auto !important;)
reddit.com##html, body:style(overflow: auto !important; position: static !important;)
reddit.com##shreddit-app:style(pointer-events: auto !important; overflow: auto !important;)
reddit.com##+js(prevent-addEventListener, touchmove)
reddit.com##+js(rc, rpl-scroll-lock, body, stay)
reddit.com##+js(rc, rpl-scroll-lock, html, stay)
reddit.com##+js(rc, scroll-is-blocked, body, stay)

Ubuntu 26.04 LTS shipped a ZFS version that doesn't support the kernel it's on

My server monitor happens to sit behind me and normally I have it off but had it on this week. I was a bit surprised to watch my server restart for no reason. Luckily I had a /var/crash log

[127370.214509] [ T715896] ————[ cut here ]———— [127370.214515] [ T715896] Unexpected gfp: 0x40000 (__GFP_COMP). Fixing up to gfp: 0x2d00 (GFP_NOIO|__GFP_ZERO|__GFP_NOWARN). Fix your code! [127370.214520] [ T715896] WARNING: mm/vmalloc.c:3953 at __vmalloc_noprof+0x74/0x90, CPU#3: restic/715896 … [127370.214684] [ T715896] RIP: 0010:__vmalloc_noprof+0x7c/0x90

[169828.633817] [ T950981] usercopy: Kernel memory exposure attempt detected from vmalloc ‘no area’ (offset 0, size 204848)! [169828.635990] [ T950981] ————[ cut here ]———— [169828.635992] [ T950981] kernel BUG at mm/usercopy.c:102! [169828.637185] [ T950981] Oops: invalid opcode: 0000 [#1] SMP NOPTI … [169828.641626] [ T950981] RIP: 0010:usercopy_abort+0x7a/0x7c

Fortunately this one was already know, ZFS 2.4.1 shipped with Ubuntu Server LTS and it…doesn’t support kernel 7. Was really surprised to learn that. Apparently I have to wait until 26.10 in October for a fix :(

For now Im trying to give the docker container more memory, this situation is triggered by the container being killed while writing to ZFS which kills the kernel.