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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accounting
arch	parisc: Align parisc MADV_XXX constants with all other architectures	2023-01-14 10:33:40 +01:00
bootconfig
bpf	bpftool: Fix memory leak in do_build_table_cb	2022-12-31 13:32:23 +01:00
build	perf bpf: Fix build with libbpf 0.7.0 by checking if bpf_program__set_insns() is available	2022-10-25 17:40:48 -03:00
certs
cgroup	iocost_monitor: reorder BlkgIterator	2022-09-23 16:57:10 -10:00
counter
debugging
edid
firewire
firmware
gpio	tools: gpio: fix -c option of gpio-event-mon	2023-02-01 08:34:49 +01:00
hv
iio	tools: iio: iio_generic_buffer: Fix read size	2022-11-01 08:48:13 +00:00
include	tools/nolibc: prevent gcc from making memset() loop over itself	2023-02-01 08:34:31 +01:00
io_uring
kvm/kvm_stat	tools/kvm_stat: update exit reasons for vmx/svm/aarch64/userspace	2022-11-09 12:26:52 -05:00
laptop
leds
lib	libbpf: Avoid enum forward-declarations in public API in C++ mode	2022-12-31 13:33:03 +01:00
memory-model
objtool	objtool: Fix SEGFAULT	2023-01-04 11:28:57 +01:00
pci
pcmcia
perf	perf kmem: Support field "node" in evsel__process_alloc_event() coping with recent tracepoint restructuring	2023-01-18 11:58:31 +01:00
power	pm-graph v5.10	2022-10-25 17:46:15 +02:00
rcu
scripts
spi
testing	cgroup/cpuset: Fix wrong check in update_parent_subparts_cpumask()	2023-02-09 11:28:15 +01:00
thermal
time
tracing
usb
verification	rv/dot2c: Make automaton definition static	2022-10-20 16:02:45 -04:00
virtio	tools/virtio: initialize spinlocks in vring_test.c	2023-01-24 07:24:30 +01:00
vm	tools/vm/slabinfo-gnuplot: use "grep -E" instead of "egrep"	2022-11-30 14:49:41 -08:00
wmi
Makefile