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| author | Waiman Long <[email protected]> | 2023-01-15 19:31:22 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2023-01-16 09:07:25 +0000 |
| commit | 5657c116783545fb49cd7004994c187128552b12 (patch) | |
| tree | 4d8906a3c05a5b56455deccd6008a126e157684c /tools/perf/tests/bpf-script-example.c | |
| parent | sched/fair: Fixes for capacity inversion detection (diff) | |
| download | kernel-5657c116783545fb49cd7004994c187128552b12.tar.gz kernel-5657c116783545fb49cd7004994c187128552b12.zip | |
sched/core: Fix NULL pointer access fault in sched_setaffinity() with non-SMP configs
The kernel commit 9a5418bc48ba ("sched/core: Use kfree_rcu() in
do_set_cpus_allowed()") introduces a bug for kernels built with non-SMP
configs. Calling sched_setaffinity() on such a uniprocessor kernel will
cause cpumask_copy() to be called with a NULL pointer leading to general
protection fault. This is not really a problem in real use cases as
there aren't that many uniprocessor kernel configs in use and calling
sched_setaffinity() on such a uniprocessor system doesn't make sense.
Fix this problem by making sure cpumask_copy() will not be called in
such a case.
Fixes: 9a5418bc48ba ("sched/core: Use kfree_rcu() in do_set_cpus_allowed()")
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Waiman Long <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'tools/perf/tests/bpf-script-example.c')
0 files changed, 0 insertions, 0 deletions