On 4/13/21 3:47 AM, Dan Carpenter wrote:
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 <dan.carpenter@xxxxxxxxxx>
Acked-by: Shannon Nelson <snelson@xxxxxxxxxxx>
---
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 86ae5011ac9b..d7d8d5e81ea0 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,
