Trigger poll/epoll events on zero-length hostinet sendmsg

Fixes #2726

PiperOrigin-RevId: 380753516

1 files changed, 2 insertions, 6 deletions

diff --git a/test/syscalls/linux/udp_socket.cc b/test/syscalls/linux/udp_socket.cc
index 2b687c198..b40598767 100644
--- a/test/syscalls/linux/udp_socket.cc
+++ b/test/syscalls/linux/udp_socket.cc
@@ -1429,12 +1429,8 @@ TEST_P(UdpSocketTest, FIONREADZeroLengthPacket) {
         sendto(sock_.get(), buf + i * psize, 0, 0, bind_addr_, addrlen_),
         SyscallSucceedsWithValue(0));
 
-    // TODO(gvisor.dev/issue/2726): sending a zero-length message to a hostinet
-    // socket does not cause a poll event to be triggered.
-    if (!IsRunningWithHostinet()) {
-      ASSERT_THAT(RetryEINTR(poll)(&pfd, 1, /*timeout=*/1000),
-                  SyscallSucceedsWithValue(1));
-    }
+    ASSERT_THAT(RetryEINTR(poll)(&pfd, 1, /*timeout=*/1000),
+                SyscallSucceedsWithValue(1));
 
     // Check that regardless of how many packets are in the queue, the size
     // reported is that of a single packet.