yam: fix a memory leak in yam_siocdevprivate()

BugLink: https://bugs.launchpad.net/bugs/1959879
[ Upstream commit 29eb31542787e1019208a2e1047bb7c76c069536 ]

ym needs to be free when ym->cmd != SIOCYAMSMCS.

Fixes: 0781168e23a2 ("yam: fix a missing-check bug")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>

diff --git a/drivers/net/hamradio/yam.c b/drivers/net/hamradio/yam.c
index 6ddacbdb224ba1d2215fdb4281e60dbf087c1524..528d57a43539474e793a3d701c49165f993d2ea4 100644 (file)
--- a/drivers/net/hamradio/yam.c
+++ b/drivers/net/hamradio/yam.c
@@ -950,9 +950,7 @@ static int yam_siocdevprivate(struct net_device *dev, struct ifreq *ifr, void __
                ym = memdup_user(data, sizeof(struct yamdrv_ioctl_mcs));
                if (IS_ERR(ym))
                        return PTR_ERR(ym);
-               if (ym->cmd != SIOCYAMSMCS)
-                       return -EINVAL;
-               if (ym->bitrate > YAM_MAXBITRATE) {
+               if (ym->cmd != SIOCYAMSMCS || ym->bitrate > YAM_MAXBITRATE) {
                        kfree(ym);
                        return -EINVAL;
                }