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net: ethernet: Fix vlan tag verification

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`net_eth_vlan_enable()` allowed to use illegal vlan tag values, fix this
by disallowing any tag value higher or equal to 0xfff (which is a limit
for the tag and a reserved value).

Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
This commit is contained in:
Robert Lubos 2021-11-23 12:24:50 +01:00 • committed by Anas Nashif
commit 85e2bf2a2c
1 changed files with 1 additions and 1 deletions
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2
subsys/net/l2/ethernet/ethernet.c
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@ -941,7 +941,7 @@ int net_eth_vlan_enable(struct net_if *iface, uint16_t tag)
return -EPERM; return -EPERM;
} }
if (tag == NET_VLAN_TAG_UNSPEC) { if (tag >= NET_VLAN_TAG_UNSPEC) {
return -EBADF; return -EBADF;
} }