[Bug,1087,Bug] tcp data len is incorrectly calculated in gro_tcp4_reassemble function
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Commit Message
https://bugs.dpdk.org/show_bug.cgi?id=1087
Bug ID: 1087
Summary: [Bug] tcp data len is incorrectly calculated in
gro_tcp4_reassemble function
Product: DPDK
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: other
Assignee: dev@dpdk.org
Reporter: 853048484@qq.com
Target Milestone: ---
Hello:
In gro_tcp4_reassemble function, tcp data len is calculated:
tcp_dl = pkt->pkt_len - hdr_len;
https://github.com/DPDK/dpdk/blob/v22.07/lib/gro/gro_tcp4.c#L232
if packets < 60 bytes, pkt_len will contain padding bytes, tcp_dl is
incorrectly calculated. this will result the wrong data length after gro.
Comments
https://bugs.dpdk.org/show_bug.cgi?id=1087
jinag (853048484@qq.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from jinag (853048484@qq.com) ---
fixed by:
https://github.com/DPDK/dpdk/commit/b8a55871d5af6f5b8694b1cb5eacbc629734e403
https://github.com/DPDK/dpdk/commit/72f51b097a71fb9bdea13bdd254ff620b34c852e
7498c66141..cbba9fed5e 100644
@@ -229,7 +229,7 @@ gro_tcp4_reassemble(struct rte_mbuf *pkt,
* Don't process the packet whose payload length is less than or
* equal to 0.
*/
- tcp_dl = pkt->pkt_len - hdr_len;
+ tcp_dl = rte_be_to_cpu_16(ipv4_hdr->total_length) - hdr_len;
if (tcp_dl <= 0)
return -1;