Cucumber Reports (no 1) - Feature: System memory erasure on shutdown

Project	Number	Date
test_Tails_ISO_21250-forbid-modify-self-memory	1	17 Aug 2026, 12:28

	Steps	Scenarios	Features
System memory erasure on shutdown	45	1	5	0	0	51	5	1	6	8:30.614	Failed

47.385

Scenario Erasure of memory freed by killed userspace processes

Hooks

Before features/support/hooks.rb:274 0.000

Before features/support/hooks.rb:281 0.002

Steps

Given I have started Tails from DVD without network and logged in 47.385

Failed

Failed to restore snapshot (RuntimeError)
./features/step_definitions/common_steps.rb:53:in `rescue in post_snapshot_restore_hook'
./features/step_definitions/common_steps.rb:36:in `post_snapshot_restore_hook'
./features/step_definitions/snapshots.rb:220:in `reach_checkpoint'
./features/step_definitions/common_steps.rb:59:in `rescue in post_snapshot_restore_hook'
./features/step_definitions/common_steps.rb:36:in `post_snapshot_restore_hook'
./features/step_definitions/snapshots.rb:220:in `reach_checkpoint'
./features/step_definitions/common_steps.rb:59:in `rescue in post_snapshot_restore_hook'
./features/step_definitions/common_steps.rb:36:in `post_snapshot_restore_hook'
./features/step_definitions/snapshots.rb:220:in `reach_checkpoint'
./features/step_definitions/common_steps.rb:59:in `rescue in post_snapshot_restore_hook'
./features/step_definitions/common_steps.rb:36:in `post_snapshot_restore_hook'
./features/step_definitions/snapshots.rb:220:in `reach_checkpoint'
./features/step_definitions/snapshots.rb:226:in `/^I\ have\ started\ Tails\ from\ DVD\ without\ network\ and\ logged\ in$/'
features/erase_memory.feature:14:in `Given I have started Tails from DVD without network and logged in'

And I prepare Tails for memory erasure tests 0.000

When I start a process allocating 128 MiB of memory with a known pattern 0.000

# Since Debian Trixie we only get 99.610% coverage (tails#21012)

Then patterns cover at least 127 MiB in the guest's memory 0.000

When I kill the allocating process 0.000

Then I find very few patterns in the guest's memory after 5 seconds 0.000

Hooks

After features/support/hooks.rb:339 5.354

Output 1

SCENARIO FAILED: 'Erasure of memory freed by killed userspace processes' (at time 00:30:22)

Boot log: https://jenkins.tails.boum.org/job/test_Tails_ISO_21250-forbid-modify-self-memory/1/artifact/build-artifacts/00:30:22_Erasure_of_memory_freed_by_killed_userspace_processes.file_content_var_log_boot.log

Screenshot: https://jenkins.tails.boum.org/job/test_Tails_ISO_21250-forbid-modify-self-memory/1/artifact/build-artifacts/00:30:22_Erasure_of_memory_freed_by_killed_userspace_processes.png

Video: https://jenkins.tails.boum.org/job/test_Tails_ISO_21250-forbid-modify-self-memory/1/artifact/build-artifacts/00:30:22_Erasure_of_memory_freed_by_killed_userspace_processes.mkv

Systemd journal: https://jenkins.tails.boum.org/job/test_Tails_ISO_21250-forbid-modify-self-memory/1/artifact/build-artifacts/00:30:22_Erasure_of_memory_freed_by_killed_userspace_processes.journal

After features/support/hooks.rb:108 0.000

Tags: @product @slow @not_release_blocker

20.927

Scenario Erasure of tmpfs data on unmount

Hooks

Before features/support/hooks.rb:274 0.000

Before features/support/hooks.rb:281 0.002

Steps

Given I have started Tails from DVD without network and logged in 6.320

And I prepare Tails for memory erasure tests 0.319

And I find very few patterns in the guest's memory 2.704

Output 1

Pattern coverage: 0.000% (0 MiB out of 1479 MiB reference memory)

When I mount a 128 MiB tmpfs on "/mnt" and fill it with a known pattern 1.464

Then patterns cover at least 99% of the test FS size in the guest's memory 3.405

Output 1

Pattern coverage: 100.000% (128 MiB out of 128 MiB reference memory)

When I umount "/mnt" 0.387

Then I find very few patterns in the guest's memory after 3 seconds 6.325

Output 1

Pattern coverage: 0.000% (0 MiB out of 1479 MiB reference memory)

Hooks

After features/support/hooks.rb:339 0.857

After features/support/hooks.rb:108 0.000

Tags: @product @slow @not_release_blocker

38.469

Scenario Erasure of read and write disk caches on unmount: vfat

Hooks

Before features/support/hooks.rb:274 0.000

Before features/support/hooks.rb:281 0.002

Steps

Given I have started Tails from DVD without network and logged in 6.635

And I prepare Tails for memory erasure tests 0.324

When I plug and mount a 128 MiB USB drive with a vfat filesystem 5.294

Then I find very few patterns in the guest's memory 3.194

Output 1

Pattern coverage: 0.000% (0 MiB out of 1471 MiB reference memory)

# write cache

When I fill the USB drive with a known pattern 2.925

Then patterns cover at least 75% of the test FS size in the guest's memory 3.301

Output 1

Pattern coverage: 100.000% (127 MiB out of 127 MiB reference memory)

When I umount the USB drive 0.722

Then I find very few patterns in the guest's memory after 3 seconds 5.701

Output 1

Pattern coverage: 0.000% (0 MiB out of 1471 MiB reference memory)

# read cache

When I mount the USB drive again 0.180

And I read the content of the test FS 0.598

Then patterns cover at least 99% of the test FS size in the guest's memory 3.111

Output 1

Pattern coverage: 100.000% (127 MiB out of 127 MiB reference memory)

When I umount the USB drive 0.421

Then I find very few patterns in the guest's memory after 3 seconds 6.056

Output 1

Pattern coverage: 0.000% (0 MiB out of 1471 MiB reference memory)

Hooks

After features/support/hooks.rb:339 0.764

After features/support/hooks.rb:108 0.000

Tags: @product @slow @not_release_blocker

1:4.062

Scenario Erasure of read and write disk caches on unmount: LUKS-encrypted ext4

Hooks

Before features/support/hooks.rb:274 0.000

Before features/support/hooks.rb:281 0.002

Steps

Given I have started Tails from DVD without network and logged in 6.423

And I prepare Tails for memory erasure tests 0.365

When I plug and mount a 128 MiB USB drive with an ext4 filesystem encrypted with password "asdf" 30.087

Then I find very few patterns in the guest's memory 3.009

Output 1

Pattern coverage: 0.000% (0 MiB out of 1461 MiB reference memory)

# write cache

When I fill the USB drive with a known pattern 1.193

Then patterns cover at least 99% of the test FS size in the guest's memory 3.054

Output 1

Pattern coverage: 106.115% (97 MiB out of 91 MiB reference memory)

When I umount the USB drive 0.549

Then I find very few patterns in the guest's memory after 3 seconds 5.567

Output 1

Pattern coverage: 0.000% (0 MiB out of 1461 MiB reference memory)

# read cache

When I mount the USB drive again 3.967

And I read the content of the test FS 0.496

Then patterns cover at least 99% of the test FS size in the guest's memory 3.205

Output 1

Pattern coverage: 106.115% (97 MiB out of 91 MiB reference memory)

When I umount the USB drive 0.492

Then I find very few patterns in the guest's memory after 3 seconds 5.649

Output 1

Pattern coverage: 0.000% (0 MiB out of 1461 MiB reference memory)

Hooks

After features/support/hooks.rb:339 0.686

After features/support/hooks.rb:108 0.000

Tags: @product @slow @not_release_blocker

57.145

Scenario Erasure of the overlayfs read-write branch on shutdown

Hooks

Before features/support/hooks.rb:274 0.000

Before features/support/hooks.rb:281 0.001

Steps

Given I have started Tails from DVD without network and logged in 18.642

And I prepare Tails for memory erasure tests 0.360

When I fill a 128 MiB file with a known pattern on the root filesystem 13.221

# ensure the pattern is in memory due to tmpfs, not to disk cache

And I drop all kernel caches 1.551

Then patterns cover at least 128 MiB in the guest's memory 2.603

Output 1

Pattern coverage: 100.000% (128 MiB out of 128 MiB reference memory)

When I trigger shutdown 0.005

Then I find very few patterns in the guest's memory after 20 seconds 20.760

Output 1

Pattern coverage: 0.000% (0 MiB out of 1481 MiB reference memory)

Hooks

After features/support/hooks.rb:339 3.529

After features/support/hooks.rb:108 0.000

Tags: @product @slow @not_release_blocker

4:42.624

Scenario Erasure of read and write disk caches of persistent data on shutdown

Hooks

Before features/support/hooks.rb:274 0.000

Before features/support/hooks.rb:281 0.004

Steps

Given I have started Tails without network from a USB drive with a persistent partition enabled and logged in 4:11.629

And I prepare Tails for memory erasure tests 0.375

When I fill a 128 MiB file with a known pattern on the persistent filesystem 9.520

When I trigger shutdown 0.005

Then I find very few patterns in the guest's memory after 20 seconds 21.092

Output 1

Pattern coverage: 0.000% (0 MiB out of 1481 MiB reference memory)

Hooks

After features/support/hooks.rb:339 3.945

After features/support/hooks.rb:108 0.012

	Steps						Scenarios			Features
Feature	Passed	Failed	Skipped	Pending	Undefined	Total	Passed	Failed	Total	Duration	Status
System memory erasure on shutdown	45	1	5	0	0	51	5	1	6	8:30.614	Failed

Feature Report