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Commit 7424713b authored by Steffen Klassert's avatar Steffen Klassert Committed by Herbert Xu
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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: default avatarSteffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent b89661df

kernel/padata.c

+1 −1
Original line number Diff line number Diff line
@@ -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))