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| H A D | ip_output.c | diff 99e5acae193e369b71217efe6f1dad42f3f18815 Thu Apr 20 07:40:35 CDT 2023 Ziyang Xuan <william.xuanziyang@huawei.com> ipv4: Fix potential uninit variable access bug in __ip_make_skb()
Like commit ea30388baebc ("ipv6: Fix an uninit variable access bug in
__ip6_make_skb()"). icmphdr does not in skb linear region under the
scenario of SOCK_RAW socket. Access icmp_hdr(skb)->type directly will
trigger the uninit variable access bug.
Use a local variable icmp_type to carry the correct value in different
scenarios.
Fixes: 96793b482540 ("[IPV4]: Add ICMPMsgStats MIB (RFC 4293)")
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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