bpf: test_maps: cleanup sockmaps when test ends

Bug: BPF programs and maps related to sockmaps test exist
in memory even after test_maps ends.

This patch fixes it as a short term workaround (sockmap
kernel side needs real fixing) by empyting sockmaps when
test ends.

Fixes: 6f6d33f3b3d0f ("bpf: selftests add sockmap tests")
Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
[ daniel: Note on workaround. ]
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

1 files changed, 12 insertions, 4 deletions

diff --git a/tools/testing/selftests/bpf/test_maps.c b/tools/testing/selftests/bpf/test_maps.c
index f0d2f09898a3..436c4c72414f 100644
--- a/tools/testing/selftests/bpf/test_maps.c
+++ b/tools/testing/selftests/bpf/test_maps.c
@@ -463,7 +463,7 @@ static void test_devmap(int task, void *data)
 #define SOCKMAP_VERDICT_PROG "./sockmap_verdict_prog.o"
 static void test_sockmap(int tasks, void *data)
 {
-        int one = 1, map_fd_rx, map_fd_tx, map_fd_break, s, sc, rc;
+        int one = 1, map_fd_rx = 0, map_fd_tx = 0, map_fd_break, s, sc, rc;
         struct bpf_map *bpf_map_rx, *bpf_map_tx, *bpf_map_break;
         int ports[] = {50200, 50201, 50202, 50204};
         int err, i, fd, udp, sfd[6] = {0xdeadbeef};
@@ -868,9 +868,12 @@ static void test_sockmap(int tasks, void *data)
                 goto out_sockmap;
         }
 
-        /* Test map close sockets */
-        for (i = 0; i < 6; i++)
+        /* Test map close sockets and empty maps */
+        for (i = 0; i < 6; i++) {
+                bpf_map_delete_elem(map_fd_tx, &i);
+                bpf_map_delete_elem(map_fd_rx, &i);
                 close(sfd[i]);
+        }
         close(fd);
         close(map_fd_rx);
         bpf_object__close(obj);
@@ -881,8 +884,13 @@ out:
         printf("Failed to create sockmap '%i:%s'!\n", i, strerror(errno));
         exit(1);
 out_sockmap:
-        for (i = 0; i < 6; i++)
+        for (i = 0; i < 6; i++) {
+                if (map_fd_tx)
+                        bpf_map_delete_elem(map_fd_tx, &i);
+                if (map_fd_rx)
+                        bpf_map_delete_elem(map_fd_rx, &i);
                 close(sfd[i]);
+        }
         close(fd);
         exit(1);
 }