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net: tcp2: Guard against th_get() on NULL pkt

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This problem was overlooked earlier and was found while
testing TCP2 client side.

Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
This commit is contained in:
Oleg Zhurakivskyy 2020-03-06 15:21:49 +02:00 • committed by Jukka Rissanen
commit 038618dbc8
1 changed files with 1 additions and 1 deletions
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2
subsys/net/ip/tcp2.c
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@ -993,7 +993,7 @@ err:
/* TCP state machine, everything happens here */ /* TCP state machine, everything happens here */
static void tcp_in(struct tcp *conn, struct net_pkt *pkt) static void tcp_in(struct tcp *conn, struct net_pkt *pkt)
{ {
struct tcphdr *th = th_get(pkt); struct tcphdr *th = pkt ? th_get(pkt) : NULL;
u8_t next = 0, fl = th ? th->th_flags : 0; u8_t next = 0, fl = th ? th->th_flags : 0;
size_t len; size_t len;