selftests/bpf/test_maps: exit child process without error in ENOMEM case

BugLink: http://bugs.launchpad.net/bugs/1786352
[ Upstream commit 80475c48c6a8a65171e035e0915dc7996b5a0a65 ]

test_maps contains a series of stress tests, and previously it will break the
rest tests when it failed to alloc memory.
-----------------------
Failed to create hashmap key=8 value=262144 'Cannot allocate memory'
Failed to create hashmap key=16 value=262144 'Cannot allocate memory'
Failed to create hashmap key=8 value=262144 'Cannot allocate memory'
Failed to create hashmap key=8 value=262144 'Cannot allocate memory'
test_maps: test_maps.c:955: run_parallel: Assertion `status == 0' failed.
Aborted
not ok 1..3 selftests:  test_maps [FAIL]
-----------------------
after this patch, the rest tests will be continue when it occurs an ENOMEM failure

CC: Alexei Starovoitov <alexei.starovoitov@gmail.com>
CC: Philip Li <philip.li@intel.com>
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Li Zhijian <zhijianx.li@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/tools/testing/selftests/bpf/test_maps.c b/tools/testing/selftests/bpf/test_maps.c
index 5fb1355f80fc2f64f955fa1299a7d2705a5947bc..ccffe527742908c94114e82bb0a5691ced14b18a 100644 (file)
--- a/tools/testing/selftests/bpf/test_maps.c
+++ b/tools/testing/selftests/bpf/test_maps.c
@@ -126,6 +126,8 @@ static void test_hashmap_sizes(int task, void *data)
                        fd = bpf_create_map(BPF_MAP_TYPE_HASH, i, j,
                                            2, map_flags);
                        if (fd < 0) {
+                               if (errno == ENOMEM)
+                                       return;
                                printf("Failed to create hashmap key=%d value=%d '%s'\n",
                                       i, j, strerror(errno));
                                exit(1);