Messages in this thread Patch in this message | | | From | "Paul E. McKenney" <> | Subject | [PATCH rcu 7/7] scftorture: Avoid NULL pointer exception on early exit | Date | Wed, 21 Jul 2021 14:04:41 -0700 |
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When scftorture finds an error in the module parameters controlling the relative frequencies of smp_call_function*() variants, it takes an early exit. So early that it has not allocated memory to track the kthreads running the test, which results in a segfault. This commit therefore checks for the existence of the memory before attempting to stop the kthreads that would otherwise have been recorded in that non-existent memory.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org> --- kernel/scftorture.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/scftorture.c b/kernel/scftorture.c index 5cf40e4383191..64a08288b1a6d 100644 --- a/kernel/scftorture.c +++ b/kernel/scftorture.c @@ -513,7 +513,7 @@ static void scf_torture_cleanup(void) return; WRITE_ONCE(scfdone, true); - if (nthreads) + if (nthreads && scf_stats_p) for (i = 0; i < nthreads; i++) torture_stop_kthread("scftorture_invoker", scf_stats_p[i].task); else -- 2.31.1.189.g2e36527f23
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