Waiman Long a2ab7f2cf5 cgroup/cpuset: Fix wrong check in update_parent_subparts_cpumask() ... commit e5ae880384 upstream. It was found that the check to see if a partition could use up all the cpus from the parent cpuset in update_parent_subparts_cpumask() was incorrect. As a result, it is possible to leave parent with no effective cpu left even if there are tasks in the parent cpuset. This can lead to system panic as reported in [1]. Fix this probem by updating the check to fail the enabling the partition if parent's effective_cpus is a subset of the child's cpus_allowed. Also record the error code when an error happens in update_prstate() and add a test case where parent partition and child have the same cpu list and parent has task. Enabling partition in the child will fail in this case. [1] https://www.spinics.net/lists/cgroups/msg36254.html Fixes: f0af1bfc27 ("cgroup/cpuset: Relax constraints to partition & cpus changes") Cc: stable@vger.kernel.org # v6.1 Reported-by: Srinivas Pandruvada <srinivas.pandruvada@intel.com> Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-02-09 11:28:15 +01:00
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crypto/chacha20-s390	…
cxl	tools/testing/cxl: Add a single-port host-bridge regression config	2022-11-04 16:01:24 -07:00
fault-injection	…
ktest	ktest.pl minconfig: Unset configs instead of just removing them	2023-01-07 11:11:37 +01:00
kunit	kunit: tool: Don't download risc-v opensbi firmware with wget	2022-10-07 10:16:28 -06:00
memblock	memblock tests: Fix compilation error.	2023-01-24 07:24:32 +01:00
nvdimm	…
radix-tree	maple_tree: reorganize testing to restore module testing	2022-11-08 15:57:22 -08:00
scatterlist	…
selftests	cgroup/cpuset: Fix wrong check in update_parent_subparts_cpumask()	2023-02-09 11:28:15 +01:00
vsock	vsock_test: POLLIN + SO_RCVLOWAT test	2022-08-23 10:43:12 +02:00