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authorSteffen Klassert <steffen.klassert@secunet.com>2010-07-20 08:51:25 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2010-07-26 14:13:58 +0800
commit7424713b83587006da72da84d7922471e366faba (patch)
treef6b8cf5db118494fc70be8f97309fd2434545223 /kernel
parentb89661dff525a46edb7ee8a4423b5212068c05c0 (diff)
downloadvexpress-lsk-7424713b83587006da72da84d7922471e366faba.tar.gz
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: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/padata.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/padata.c b/kernel/padata.c
index 6a519454a5b..7f895e2b4ef 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))