The pp->indir[0] value comes from the user. It is passed to:
if (cpu_online(pp->rxq_def))
inside the mvneta_percpu_elect() function. It needs bounds checkeding
to ensure that it is not beyond the end of the cpu bitmap.
Fixes: cad5d847a093 ("net: mvneta: Fix the CPU choice in mvneta_percpu_elect")
Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
---
drivers/net/ethernet/marvell/mvneta.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index c2cb98d24f5c..5abc7c3e399e 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -4927,6 +4927,9 @@ static int mvneta_config_rss(struct mvneta_port *pp)
napi_disable(&pp->napi);
}
+ if (pp->indir[0] >= nr_cpu_ids)
+ return -EINVAL;
+
pp->rxq_def = pp->indir[0];
/* Update unicast mapping */
--
2.35.1
