From 5871d0c6b8ea805916c3135d0c53b095315bc674 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 13 Apr 2021 13:47:59 +0300 Subject: [PATCH] ionic: return -EFAULT if copy_to_user() fails The copy_to_user() function returns the number of bytes that it wasn't able to copy. We want to return -EFAULT to the user. Fixes: fee6efce565d ("ionic: add hw timestamp support files") Signed-off-by: Dan Carpenter Acked-by: Shannon Nelson Signed-off-by: David S. Miller --- drivers/net/ethernet/pensando/ionic/ionic_phc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/pensando/ionic/ionic_phc.c b/drivers/net/ethernet/pensando/ionic/ionic_phc.c index 177dbf89affd..a87c87e86aef 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_phc.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_phc.c @@ -225,7 +225,9 @@ int ionic_lif_hwstamp_get(struct ionic_lif *lif, struct ifreq *ifr) memcpy(&config, &lif->phc->ts_config, sizeof(config)); mutex_unlock(&lif->phc->config_lock); - return copy_to_user(ifr->ifr_data, &config, sizeof(config)); + if (copy_to_user(ifr->ifr_data, &config, sizeof(config))) + return -EFAULT; + return 0; } static u64 ionic_hwstamp_read(struct ionic *ionic, -- 2.11.0