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SourcePath::resolveSymlinks(): Fix handling of symlinks that start with '..' #8452

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merged 1 commit into from Jun 6, 2023
Merged

SourcePath::resolveSymlinks(): Fix handling of symlinks that start with '..' #8452

merged 1 commit into from Jun 6, 2023

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edolstra
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@edolstra edolstra commented Jun 5, 2023

Motivation

Fixes #8437.

Context

Checklist for maintainers

Maintainers: tick if completed or explain if not relevant

  • agreed on idea
  • agreed on implementation strategy
  • tests, as appropriate
    • functional tests - tests/**.sh
    • unit tests - src/*/tests
    • integration tests - tests/nixos/*
  • documentation in the manual
  • documentation in the internal API docs
  • code and comments are self-explanatory
  • commit message explains why the change was made
  • new feature or incompatible change: updated release notes

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@edolstra edolstra added the backport 2.16-maintenance Automatically creates a PR against the branch label Jun 5, 2023
@github-actions github-actions bot added fetching Networking with the outside (non-Nix) world with-tests Issues related to testing. PRs with tests have some priority labels Jun 5, 2023
@roberth roberth added the bug label Jun 5, 2023
roberth
roberth reviewed Jun 5, 2023
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src/libutil/canon-path.hh Outdated Show resolved Hide resolved
@fricklerhandwerk
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Suggestion for commit message: Previously, when resolving a symlink, .. components would not be taken into account.

@github-actions github-actions bot removed the with-tests Issues related to testing. PRs with tests have some priority label Jun 5, 2023
@infinisil
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Can you also add a test case to prevent against this bug in the future?

@edolstra
Fix SourcePath::resolveSymlinks()
f5c6b29 
This fixes handling of symlinks that start with '..', and symlink
targets that contain symlinks themselves.
@github-actions github-actions bot added the with-tests Issues related to testing. PRs with tests have some priority label Jun 6, 2023
@edolstra
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edolstra commented Jun 6, 2023

Added a test.

@edolstra edolstra enabled auto-merge June 6, 2023 09:24
@edolstra edolstra merged commit f5ab40c into NixOS:master Jun 6, 2023
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@github-actions github-actions bot mentioned this pull request Jun 6, 2023
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github-actions bot commented Jun 6, 2023

Successfully created backport PR for 2.16-maintenance:

@edolstra edolstra deleted the fix-relative-symlinks branch June 6, 2023 10:39
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backport 2.16-maintenance Automatically creates a PR against the branch bug fetching Networking with the outside (non-Nix) world with-tests Issues related to testing. PRs with tests have some priority
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Successfully merging this pull request may close these issues.

[2.16 regression] "Infinite symlink recursion" when evaluating nixos-hardware
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@edolstra @fricklerhandwerk @infinisil @roberth