Now that we allow to change the cpumasks from userspace, we have to check for valid cpumasks in padata_do_parallel. This patch adds the necessary check. This fixes a division by zero crash if the parallel cpumask contains no active cpu. Signed-off-by: Steffen Klassert <steffen.klassert@xxxxxxxxxxx> --- kernel/padata.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kernel/padata.c b/kernel/padata.c index 6a51945..7f895e2 100644 --- a/kernel/padata.c +++ b/kernel/padata.c @@ -114,7 +114,7 @@ int padata_do_parallel(struct padata_instance *pinst, pd = rcu_dereference(pinst->pd); err = -EINVAL; - if (!(pinst->flags & PADATA_INIT)) + if (!(pinst->flags & PADATA_INIT) || pinst->flags & PADATA_INVALID) goto out; if (!cpumask_test_cpu(cb_cpu, pd->cpumask.cbcpu)) -- 1.5.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
