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net: ipv6: Extension header length failure not properly checked

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The ipv6_handle_ext_hdr_options() can return negative value
but we stored it into unsigned variable and then checked < 0.

Coverity-CID: 190995
Fixes #13830

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
Jukka Rissanen 2019-02-28 09:57:16 +02:00 committed by Kumar Gala
parent a6614a32c1
commit 8e066aba0f
1 changed files with 1 additions and 1 deletions
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2
subsys/net/ip/ipv6.c
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@ -486,7 +486,7 @@ enum net_verdict net_ipv6_input(struct net_pkt *pkt, bool is_loopback)
nexthdr = hdr->nexthdr;
while (!net_ipv6_is_nexthdr_upper_layer(nexthdr)) {
u16_t exthdr_len;
int exthdr_len;
NET_DBG("IPv6 next header %d", nexthdr);