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| author | Tejun Heo <[email protected]> | 2019-06-05 16:54:34 +0000 |
|---|---|---|
| committer | Tejun Heo <[email protected]> | 2019-06-05 16:54:34 +0000 |
| commit | cee0c33c546a93957a52ae9ab6bebadbee765ec5 (patch) | |
| tree | 677530356898bb2d9b4633f2a39065788ff2a619 /drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | |
| parent | cgroup: Include dying leaders with live threads in PROCS iterations (diff) | |
| download | kernel-cee0c33c546a93957a52ae9ab6bebadbee765ec5.tar.gz kernel-cee0c33c546a93957a52ae9ab6bebadbee765ec5.zip | |
cgroup: css_task_iter_skip()'d iterators must be advanced before accessed
b636fd38dc40 ("cgroup: Implement css_task_iter_skip()") introduced
css_task_iter_skip() which is used to fix task iterations skipping
dying threadgroup leaders with live threads. Skipping is implemented
as a subportion of full advancing but css_task_iter_next() forgot to
fully advance a skipped iterator before determining the next task to
visit causing it to return invalid task pointers.
Fix it by making css_task_iter_next() fully advance the iterator if it
has been skipped since the previous iteration.
Signed-off-by: Tejun Heo <[email protected]>
Reported-by: syzbot
Link: http://lkml.kernel.org/r/[email protected]
Fixes: b636fd38dc40 ("cgroup: Implement css_task_iter_skip()")
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_device.c')
0 files changed, 0 insertions, 0 deletions