Commit 7424713b authored by Steffen Klassert's avatar Steffen Klassert Committed by Herbert Xu

padata: Check for valid cpumasks

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: 's avatarSteffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: 's avatarHerbert Xu <herbert@gondor.apana.org.au>
parent b89661df
......@@ -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))
......
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