msg/async/dpdk: fix SEGV caused by zero length packet

calculating zero length packet checksum will cause segv,
so skip sending the packet here.

Fixes: https://tracker.ceph.com/issues/42805
Signed-off-by: Chunsong Feng <fengchunsong@huawei.com>

diff --git a/src/msg/async/dpdk/DPDKStack.h b/src/msg/async/dpdk/DPDKStack.h
index e41a87545220ee81fbd4de4d1c5f19f372646dd6..65e089c67447e1181e4e6299f34443f828294e65 100644 (file)
--- a/src/msg/async/dpdk/DPDKStack.h
+++ b/src/msg/async/dpdk/DPDKStack.h
@@ -141,6 +141,11 @@ class NativeConnectedSocketImpl : public ConnectedSocketImpl {
     uint64_t seglen = 0;
     while (len < available && left_pbrs--) {
       seglen = pb->length();
+      // Buffer length is zero, no need to send, so skip it
+      if (seglen == 0) {
+        ++pb;
+        continue;
+      }
       if (len + seglen > available) {
         // don't continue if we enough at least 1 fragment since no available
         // space for next ptr.