Bug#1034624: zfs-dkms: Please revert corruption-causing optimization in 2.1.10 release

[M. Zhou]

Control: fixed -1 2.1.11-1

2.1.11-1 has migrated to testing.

Bug#1034624: zfs-dkms: Please revert corruption-causing optimization in 2.1.10 release

[Chris]

Package: zfs-dkms
Version: 2.1.9-1~bpo11+1
Severity: critical
Tags: upstream
Justification: causes serious data loss

Dear Maintainer,

For the 2.1.10 release please revert the commit referenced in 

It appears an optimization brought forth a bug that was apready fixed
once. https://github.com/openzfs/zfs/pull/13368 is the commit.

-- System Information:
Debian Release: 11.6
  APT prefers stable-updates
  APT policy: (990, 'stable-updates'), (990, 'stable-security'), (990, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-21-amd64 (SMP w/32 CPU threads)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, 
TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) (ignored: LC_ALL 
set to en_US.UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
LSM: AppArmor: enabled

Versions of packages zfs-dkms depends on:
ii  debconf [debconf-2.0]  1.5.77
ii  dkms   2.8.4-3
ii  file   1:5.39-3
ii  libc6-dev [libc-dev]   2.31-13+deb11u5
ii  libpython3-stdlib  3.9.2-3
ii  lsb-release11.1.0
ii  perl   5.32.1-4+deb11u2
ii  python3-distutils  3.9.2-1

Versions of packages zfs-dkms recommends:
ii  linux-libc-dev  5.10.162-1
ii  zfs-zed 2.1.9-1~bpo11+1
ii  zfsutils-linux  2.1.9-1~bpo11+1

Versions of packages zfs-dkms suggests:
ii  debhelper  13.3.4

-- debconf-show failed