padata: Allocate the cpumask for the padata instance
The cpumask of the padata instance was used without allocated.
This caused boot crashes if CONFIG_CPUMASK_OFFSTACK is enabled.
This patch fixes this by doing proper allocation for this cpumask.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/kernel/padata.c b/kernel/padata.c
index 6f9bcb8..93caf65 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -642,6 +642,9 @@
if (!pd)
goto err_free_inst;
+ if (!alloc_cpumask_var(&pinst->cpumask, GFP_KERNEL))
+ goto err_free_pd;
+
rcu_assign_pointer(pinst->pd, pd);
pinst->wq = wq;
@@ -654,12 +657,14 @@
pinst->cpu_notifier.priority = 0;
err = register_hotcpu_notifier(&pinst->cpu_notifier);
if (err)
- goto err_free_pd;
+ goto err_free_cpumask;
mutex_init(&pinst->lock);
return pinst;
+err_free_cpumask:
+ free_cpumask_var(pinst->cpumask);
err_free_pd:
padata_free_pd(pd);
err_free_inst:
@@ -685,6 +690,7 @@
unregister_hotcpu_notifier(&pinst->cpu_notifier);
padata_free_pd(pinst->pd);
+ free_cpumask_var(pinst->cpumask);
kfree(pinst);
}
EXPORT_SYMBOL(padata_free);