[PATCH AUTOSEL for 4.14 065/161] bpf: test_maps: cleanup sockmaps when test ends

[Sasha Levin]

From: Prashant Bhole <bhole_prashant...@lab.ntt.co.jp>

[ Upstream commit 783687810e986a15ffbf86c516a1a48ff37f38f7 ]

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...@lab.ntt.co.jp>
[ daniel: Note on workaround. ]
Signed-off-by: Daniel Borkmann <dan...@iogearbox.net>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
---
 tools/testing/selftests/bpf/test_maps.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_maps.c 
b/tools/testing/selftests/bpf/test_maps.c
index 50ce52d2013d..8b9470b5af6d 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);
 }
-- 
2.15.1