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| author | Kees Cook <keescook@chromium.org> | 2021-06-02 13:27:41 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-03 14:15:10 -0700 |
| commit | 9c153d3889767eb347a9b1719cc6f336faccdba9 (patch) | |
| tree | 4e7f748d0dfcf0dde63765b6a3e4b38ef9d922a0 | |
| parent | 5ff5622ea1f16d535f1be4e478e712ef48fe183b (diff) | |
| download | linux-9c153d3889767eb347a9b1719cc6f336faccdba9.tar.gz linux-9c153d3889767eb347a9b1719cc6f336faccdba9.tar.bz2 linux-9c153d3889767eb347a9b1719cc6f336faccdba9.zip | |
net: vlan: Avoid using strncpy()
Use strscpy_pad() instead of strncpy() which is considered deprecated:
https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/8021q/vlan.c | 3 | ||||
| -rw-r--r-- | net/8021q/vlan.h | 3 | ||||
| -rw-r--r-- | net/8021q/vlan_dev.c | 6 |
3 files changed, 7 insertions, 5 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c index fb3d3262dc1a..4cdf8416869d 100644 --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -638,7 +638,8 @@ static int vlan_ioctl_handler(struct net *net, void __user *arg) case GET_VLAN_REALDEV_NAME_CMD: err = 0; - vlan_dev_get_realdev_name(dev, args.u.device2); + vlan_dev_get_realdev_name(dev, args.u.device2, + sizeof(args.u.device2)); if (copy_to_user(arg, &args, sizeof(struct vlan_ioctl_args))) err = -EFAULT; diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h index fa3ad3d4d58c..e3f6ff05a528 100644 --- a/net/8021q/vlan.h +++ b/net/8021q/vlan.h @@ -129,7 +129,8 @@ void vlan_dev_set_ingress_priority(const struct net_device *dev, int vlan_dev_set_egress_priority(const struct net_device *dev, u32 skb_prio, u16 vlan_prio); int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask); -void vlan_dev_get_realdev_name(const struct net_device *dev, char *result); +void vlan_dev_get_realdev_name(const struct net_device *dev, char *result, + size_t size); int vlan_check_real_dev(struct net_device *real_dev, __be16 protocol, u16 vlan_id, diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c index 4db3f0621959..a0367b37512d 100644 --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -239,9 +239,9 @@ int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) return 0; } -void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) +void vlan_dev_get_realdev_name(const struct net_device *dev, char *result, size_t size) { - strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); + strscpy_pad(result, vlan_dev_priv(dev)->real_dev->name, size); } bool vlan_dev_inherit_address(struct net_device *dev, @@ -360,7 +360,7 @@ static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) struct ifreq ifrr; int err = -EOPNOTSUPP; - strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); + strscpy_pad(ifrr.ifr_name, real_dev->name, IFNAMSIZ); ifrr.ifr_ifru = ifr->ifr_ifru; switch (cmd) { |