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Bug#1106035: zfs: Upstream patch for old encryption data corruption bug

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Package: zfs-dkms
Version: 2.3.2-1
Severity: grave
Tags: upstream patch

Dear Maintainer,

since the release of ZFS 2.0.0 back in 2020, ZFS contains a corruption 
bug where snapshots and/or a dataset can get corrupted when using ZFS 
encryption, if you're performing a "zfs send" at the same time as making 
a snapshot (which can lead to data loss in specific scenarios, which is 
why I tagged this as 'grave'; feel free to downgrade if you disagree).

This has been discussed upstream for years at 
https://github.com/openzfs/zfs/issues/12014, but since the corruption 
wasn't deterministic and it was hard to create a proper test, this was 
apparently extremely hard to bisect.

Recently, though, people finally managed to reproduce this issue in a 
controlled environment, were able to bisect the bug to merge request 
https://github.com/openzfs/zfs/pull/7958.

A proposed fix for the issue is available at 
https://github.com/openzfs/zfs/pull/17340. If I'm reading the comments 
correctly, then this is clear broken behavior (two functions are called 
that should never be called in this way), and even though it's not 100% 
certain yet that this is definitely the fix for this long-standing 
issue, people are fairly certain it is, and there's already discussions 
about backporting it to 2.2.x (https://github.com/openzfs/zfs/pull/17325).

Given that we're in Hard Freeze already, I doubt that zfs-2.3.3 will get 
released in time to still make it into trixie.

However, given that A) the fix is extremely simple (two lines of code 
changed), B) it fixes a bug that can lead to data loss, C) the current 
implementation is definitely wrong, I was wondering if that change can 
be added to Debian's package and released as a 2.3.2-2 or similar (and 
maybe even backported to bookworm-bpo).

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Bug#1106035: zfs: Upstream patch for old encryption data corruption bug Leseratte10@vodafone.de - 2025-05-19 07:00 +0200
  Processed: Re: [Pkg-zfsonlinux-devel] Bug#1106035: zfs: Upstream  patch for old encryption data corruption bug "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-05-19 08:00 +0200
  Bug#1106035: [Pkg-zfsonlinux-devel] Bug#1106035: zfs: Upstream patch for old encryption data corruption bug Florian Bach <Leseratte10@vodafone.de> - 2025-05-19 19:40 +0200
  Bug#1106035: [Pkg-zfsonlinux-devel] Bug#1106035: zfs: Upstream patch for old encryption data corruption bug Leseratte10@vodafone.de - 2025-05-21 16:30 +0200
  Bug#1106035: [Pkg-zfsonlinux-devel] Bug#1106035: zfs: Upstream patch for old encryption data corruption bug Florian Bach <Leseratte10@vodafone.de> - 2025-06-21 14:30 +0200
  Processed: Deliberately removing zfs from trixie "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-07-02 18:20 +0200

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