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gnrc_ipv6_ext_frag: _completed: Add comment why list head is not checked

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... for NULL pointer dereference.
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Martine Lenders 2023-10-12 16:23:53 +02:00
parent 149cee491e
commit 988db6923d
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1 changed files with 1 additions and 0 deletions
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sys/net/gnrc/network_layer/ipv6/ext/frag/gnrc_ipv6_ext_frag.c
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@ -711,6 +711,7 @@ static gnrc_pktsnip_t *_completed(gnrc_ipv6_ext_frag_rbuf_t *rbuf)
/* clist: first element is second element ;-) (from next of head) */
gnrc_ipv6_ext_frag_limits_t *ptr =
(gnrc_ipv6_ext_frag_limits_t *)rbuf->limits.next->next;
/* ptr should not be NULL at this point so it is safe to dereference with ptr->start here */
if (rbuf->last && (ptr->start == 0)) {
gnrc_pktsnip_t *res = NULL;