mbuf_get_seg_ofs() doesn't handle the case when requested offset equals to packet length. Though it is a valid situation for algorithms with no ICV data (IPsec with null encryption as an example).
Fixes: 12a0423236a9 ("ipsec: support multi-segment packets") Signed-off-by: Konstantin Ananyev <konstantin.anan...@intel.com> --- lib/librte_ipsec/misc.h | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/lib/librte_ipsec/misc.h b/lib/librte_ipsec/misc.h index b0cafef4e..fe4641bfc 100644 --- a/lib/librte_ipsec/misc.h +++ b/lib/librte_ipsec/misc.h @@ -46,16 +46,22 @@ move_bad_mbufs(struct rte_mbuf *mb[], const uint32_t bad_idx[], uint32_t nb_mb, static inline struct rte_mbuf * mbuf_get_seg_ofs(struct rte_mbuf *mb, uint32_t *ofs) { - uint32_t k, n; + uint32_t k, n, plen; struct rte_mbuf *ms; - ms = mb; + plen = mb->pkt_len; n = *ofs; - for (k = rte_pktmbuf_data_len(ms); n >= k; - k = rte_pktmbuf_data_len(ms)) { - ms = ms->next; - n -= k; + if (n == plen) { + ms = rte_pktmbuf_lastseg(mb); + n = n + rte_pktmbuf_data_len(ms) - plen; + } else { + ms = mb; + for (k = rte_pktmbuf_data_len(ms); n >= k; + k = rte_pktmbuf_data_len(ms)) { + ms = ms->next; + n -= k; + } } *ofs = n; -- 2.17.1