linux-kernel - [PATCH bpf-next v2 02/14] selftests/bpf: test

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Message-Id: <20250902-xsk-v2-2-17c6345d5215@bootlin.com>
Date: Tue, 02 Sep 2025 14:49:52 +0200
From: "Bastien Curutchet (eBPF Foundation)" <bastien.curutchet@...tlin.com>
To: Björn Töpel <bjorn@...nel.org>, 
 Magnus Karlsson <magnus.karlsson@...el.com>, 
 Maciej Fijalkowski <maciej.fijalkowski@...el.com>, 
 Jonathan Lemon <jonathan.lemon@...il.com>, 
 Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, 
 Andrii Nakryiko <andrii@...nel.org>, 
 Martin KaFai Lau <martin.lau@...ux.dev>, 
 Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
 Yonghong Song <yonghong.song@...ux.dev>, 
 John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>, 
 Stanislav Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>, 
 Jiri Olsa <jolsa@...nel.org>, Mykola Lysenko <mykolal@...com>, 
 Shuah Khan <shuah@...nel.org>, "David S. Miller" <davem@...emloft.net>, 
 Jakub Kicinski <kuba@...nel.org>, Jesper Dangaard Brouer <hawk@...nel.org>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 Alexis Lothore <alexis.lothore@...tlin.com>, netdev@...r.kernel.org, 
 bpf@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 "Bastien Curutchet (eBPF Foundation)" <bastien.curutchet@...tlin.com>
Subject: [PATCH bpf-next v2 02/14] selftests/bpf: test_xsk: Initialize
 bitmap before use

bitmap is used before being initialized.

Initialize it to zero before using it.

Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@...tlin.com>
---
 tools/testing/selftests/bpf/test_xsk.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/bpf/test_xsk.c b/tools/testing/selftests/bpf/test_xsk.c
index 2b12159a7e9c465e08a452d920f3961981168fb0..ef65beec3b870ae4fdc7aae9e3c4537c8ebbfce3 100644
--- a/tools/testing/selftests/bpf/test_xsk.c
+++ b/tools/testing/selftests/bpf/test_xsk.c
@@ -1079,6 +1079,8 @@ static int receive_pkts(struct test_spec *test)
 	u32 sock_num = 0;
 	int res, ret;

+	bitmap_zero(bitmap, test->nb_sockets);
+
 	ret = gettimeofday(&tv_now, NULL);
 	if (ret)
 		exit_with_error(errno);
@@ -1269,6 +1271,8 @@ static int send_pkts(struct test_spec *test, struct ifobject *ifobject)
 	DECLARE_BITMAP(bitmap, test->nb_sockets);
 	u32 i, ret;

+	bitmap_zero(bitmap, test->nb_sockets);
+
 	while (!(all_packets_sent(test, bitmap))) {
 		for (i = 0; i < test->nb_sockets; i++) {
 			struct pkt_stream *pkt_stream;

-- 
2.50.1