The pcrypt_aead_init_tfm() function access the cpu_online_mask without disabling CPU hotplug. And it looks like it can afford to sleep, so use the get/put_online_cpus() APIs to protect against CPU hotplug. Cc: Steffen Klassert <steffen.klassert@xxxxxxxxxxx> Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> Cc: linux-crypto@xxxxxxxxxxxxxxx Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx> --- crypto/pcrypt.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/crypto/pcrypt.c b/crypto/pcrypt.c index b2c99dc..10f64e2 100644 --- a/crypto/pcrypt.c +++ b/crypto/pcrypt.c @@ -280,12 +280,16 @@ static int pcrypt_aead_init_tfm(struct crypto_tfm *tfm) ictx->tfm_count++; + get_online_cpus(); + cpu_index = ictx->tfm_count % cpumask_weight(cpu_online_mask); ctx->cb_cpu = cpumask_first(cpu_online_mask); for (cpu = 0; cpu < cpu_index; cpu++) ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask); + put_online_cpus(); + cipher = crypto_spawn_aead(crypto_instance_ctx(inst)); if (IS_ERR(cipher)) -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
