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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-07-13 11:47:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-07-13 11:47:01 -0700 |
| commit | d0b97f3891fb414bd1fd1cb3d83f0f6b9fd0d357 (patch) | |
| tree | 1e108a978d9646f09bb83675f92abd5f01f0f8ab /fs | |
| parent | 5750676b64a561f7ec920d7c6ba130fc9c7378f3 (diff) | |
| parent | 07fd5b6cdf3cc30bfde8fe0f644771688be04447 (diff) | |
Merge tag 'cgroup-for-5.19-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fix from Tejun Heo:
"Fix an old and subtle bug in the migration path.
css_sets are used to track tasks and migrations are tasks moving from
a group of css_sets to another group of css_sets. The migration path
pins all source and destination css_sets in the prep stage.
Unfortunately, it was overloading the same list_head entry to track
sources and destinations, which got confused for migrations which are
partially identity leading to use-after-frees.
Fixed by using dedicated list_heads for tracking sources and
destinations"
* tag 'cgroup-for-5.19-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: Use separate src/dst nodes when preloading css_sets for migration
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