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Thorsten Leemhuis (acct. 1/4)'s posts Back to profile
4 posts total
Thorsten Leemhuis (acct. 1/4)

The mseal() syscall was merged for #Linux 6.10: git.kernel.org/torvalds/c/0b32

It's a way to prevent changes to portions of the virtual address space – and quite similar to #OpenBSD's mimmutable() syscall.

For details see the docs (git.kernel.org/pub/scm/linux/k) or two @LWN articles (lwn.net/Articles/948129/ and lwn.net/Articles/958438/)

#LinuxKernel #kernel

The mseal() syscall was merged for #Linux 6.10: git.kernel.org/torvalds/c/0b32

It's a way to prevent changes to portions of the virtual address space – and quite similar to #OpenBSD's mimmutable() syscall.

For details see the docs (git.kernel.org/pub/scm/linux/k) or two @LWN articles (lwn.net/Articles/948129/ and lwn.net/Articles/958438/)
25 May at 6:55 | Open on fosstodon.org
Thorsten Leemhuis (acct. 1/4)

#QEMU 9.0.0 is out:

qemu.org/2024/04/23/qemu-9-0-0

wiki.qemu.org/ChangeLog/9.0

"'block: virtio-blk now supports multiqueue where different queues of a single disk can be processed by different I/O threads

migration: support for “mapped-ram” capability allowing for more efficient VM snapshots, improved support for zero-page detection, and checkpoint-restart support for VFIO

ARM: architectural feature support for ECV, NV, and NV2

ARM: board support for […] raspi4b (Raspberry Pi 4 Model B)"'

#QEMU 9.0.0 is out:

qemu.org/2024/04/23/qemu-9-0-0

wiki.qemu.org/ChangeLog/9.0

"'block: virtio-blk now supports multiqueue where different queues of a single disk can be processed by different I/O threads

migration: support for “mapped-ram” capability allowing for more efficient VM snapshots, improved support for zero-page detection, and checkpoint-restart support for VFIO
24 April at 4:00 | Open on fosstodon.org
Thorsten Leemhuis (acct. 1/4)

The #ext4 data corruption issue[1] in #Linux #kernel v6.1.64 and v6.1.65 that was fixed with #LinuxKernel 6.1.66[2] apparently hit #Debian 12.3 bookworm point release[3]. Fixes are in the works, but preparing them will take a bit[4].

[1] lore.kernel.org/stable/2023120

[2] git.kernel.org/pub/scm/linux/k

[3] bugs.debian.org/cgi-bin/bugrep

[4] fulda.social/@Ganneff/11155162

The #ext4 data corruption issue[1] in #Linux #kernel v6.1.64 and v6.1.65 that was fixed with #LinuxKernel 6.1.66[2] apparently hit #Debian 12.3 bookworm point release[3]. Fixes are in the works, but preparing them will take a bit[4].

[1] lore.kernel.org/stable/2023120
9 Dec 2023 at 17:58 | Open on fosstodon.org
Bill Statler
If I'm understanding the kernel change logs, this bug also affects kernel 5.15 versions earlier than 5.15.142. And it doesn't affect verisons 6.5 or later. (I hope a knowledgable person will double-check me on this.)
10 Dec 2023 at 2:03 | Open on forum.statler.ws
Thorsten Leemhuis (acct. 1/4)

In case you wondered why Linus recently fiddled with the user mode stack expansion code in mainline[1], here is your explanation:

CVE-2023-3269. #LinuxKernel privilege escalation vulnerability – openwall.com/lists/oss-securit

"#StackRot is a #Linux #kernel vulnerability found in the memory management subsystem [of 6.1 - 6.4], it affects almost all configurations and requires minimal capabilities to trigger"

[1] git.kernel.org/torvalds/c/9471 , which was followed by several fix-up patches in the past week

In case you wondered why Linus recently fiddled with the user mode stack expansion code in mainline[1], here is your explanation:

CVE-2023-3269. #LinuxKernel privilege escalation vulnerability – openwall.com/lists/oss-securit

"#StackRot is a #Linux #kernel vulnerability found in the memory management subsystem [of 6.1 - 6.4], it affects almost all configurations and requires minimal capabilities to trigger"

5 Jul 2023 at 13:04 | Open on fosstodon.org
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