From: Hangyu Hua hbh25y@gmail.com

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I4U4NY CVE: CVE-2022-24959

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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

conflict: The bug is in function yam_siocdevprivate() in mainline, but it is in function yam_ioctl() because the function name is changed in 25ec92fbdd("hamradio: use ndo_siocdevprivate") in mainline.

Signed-off-by: Lu Wei luwei32@huawei.com Reviewed-by: Wei Yongjun weiyongjun1@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/net/hamradio/yam.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/hamradio/yam.c b/drivers/net/hamradio/yam.c index ba9df430fca6e..f124ceab5f5e1 100644 --- a/drivers/net/hamradio/yam.c +++ b/drivers/net/hamradio/yam.c @@ -966,9 +966,7 @@ static int yam_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 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; }