From patchwork Mon Mar 17 09:22:54 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiayuan Chen X-Patchwork-Id: 14018902 Received: from out-176.mta1.migadu.com (out-176.mta1.migadu.com [95.215.58.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5463D21D3DF for ; Mon, 17 Mar 2025 09:23:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.176 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742203405; cv=none; b=XQIG1PhMqkX1HbVkC07b35Ae7gXKHUu6+l+IRniZJq5ZEHm5wYtLs2JMYiRJY9fr9LJgjBZU9Pgg1AMCcojo8YAnAEWUhYmDyrQGKbhetSXk9jP+Gbjw6ZAKxAL9XIlaTm7QPRAy/w2XZhDWm8/wr39Ou/EHtztHWeC7ydDSE/s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742203405; c=relaxed/simple; bh=6JgBiaX+YiNAyHBFl6QZJTOXgWtV+CT73L6RHoPZKaM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=p0lMNIWVGiV/UFerWbcchIw8B4vPW/Uwqf2dFtvJsTGgDMvZ9SYyoYMHyqaB/LKj8M3jK3Mh9FIIk/sGCRF+E4ClEFyOj0BDc7gOOiPpKn8X5Z9K+aannR4aOdrfIOFmS47VLEMEQpvW50Eux6iz8NpY+oNvfkLeNaIaC87x+4k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=Th86mNXH; arc=none smtp.client-ip=95.215.58.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="Th86mNXH" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1742203399; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jY9iTq55Bd81F/t9jTpUlZx7Lhi6BVyEt5CYE9tdNEM=; b=Th86mNXHVl3dV9nxq4XXPI0UxKZYLME9Wy3byKkHN3Gn+asUAJbY7IJFHJdoHcVIbioj3S bf6Bqc4hbqEkakxKTjoMM2u3pnwDknpxEy8awjdRYv7YJOtIMwvrwyDw2V5hl/w1aJg0uV n2bQDW2G8vl8FQ+f3O9quMxgGDYJpWg= From: Jiayuan Chen To: xiyou.wangcong@gmail.com, john.fastabend@gmail.com, jakub@cloudflare.com Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, andrii@kernel.org, eddyz87@gmail.com, mykolal@fb.com, ast@kernel.org, daniel@iogearbox.net, martin.lau@linux.dev, song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, shuah@kernel.org, mhal@rbox.co, jiayuan.chen@linux.dev, sgarzare@redhat.com, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH bpf-next v3 1/3] bpf, sockmap: avoid using sk_socket after free when sending Date: Mon, 17 Mar 2025 17:22:54 +0800 Message-ID: <20250317092257.68760-2-jiayuan.chen@linux.dev> In-Reply-To: <20250317092257.68760-1-jiayuan.chen@linux.dev> References: <20250317092257.68760-1-jiayuan.chen@linux.dev> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT The sk->sk_socket is not locked or referenced, and during the call to skb_send_sock(), there is a race condition with the release of sk_socket. All types of sockets(tcp/udp/unix/vsock) will be affected. Race conditions: ''' CPU0 CPU1 skb_send_sock sendmsg_unlocked sock_sendmsg sock_sendmsg_nosec close(fd): ... ops->release() sock_map_close() sk_socket->ops = NULL free(socket) sock->ops->sendmsg ^ panic here ''' Based on the fact that we already wait for the workqueue to finish in sock_map_close() if psock is held, we simply increase the psock reference count to avoid race conditions. ''' void sock_map_close() { ... if (likely(psock)) { ... psock = sk_psock_get(sk); if (unlikely(!psock)) goto no_psock; <=== Control usually jumps here via goto ... cancel_delayed_work_sync(&psock->work); <=== not executed sk_psock_put(sk, psock); ... } ''' The panic I catched: ''' Workqueue: events sk_psock_backlog RIP: 0010:sock_sendmsg+0x21d/0x440 RAX: 0000000000000000 RBX: ffffc9000521fad8 RCX: 0000000000000001 ... Call Trace: ? die_addr+0x40/0xa0 ? exc_general_protection+0x14c/0x230 ? asm_exc_general_protection+0x26/0x30 ? sock_sendmsg+0x21d/0x440 ? sock_sendmsg+0x3e0/0x440 ? __pfx_sock_sendmsg+0x10/0x10 __skb_send_sock+0x543/0xb70 sk_psock_backlog+0x247/0xb80 ... ''' Reported-by: Michal Luczaj Fixes: 799aa7f98d53 ("skmsg: Avoid lock_sock() in sk_psock_backlog()") Signed-off-by: Jiayuan Chen --- Some approach I tried 1. add rcu: - RCU conflicts with mutex_lock in Unix socket send path. - Race conditions still exist when reading sk->sk_socket->ops for in current sock_sendmsg implementation. 2. Increased the reference of sk_socket->file: - If the user calls close(fd), we will do nothing because the reference count is not set to 0. It's unexpected. 3. Use sock_lock when calling skb_send_sock: - skb_send_sock itself already do the locking. - If we call skb_send_sock_locked instead, we have to implement sendmsg_locked for each protocol, which is not easy for UDP or Unix, as the sending process involves frequent locking and unlocking, which makes it challenging to isolate the locking logic. --- net/core/skmsg.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/net/core/skmsg.c b/net/core/skmsg.c index 0ddc4c718833..6101c1bb279a 100644 --- a/net/core/skmsg.c +++ b/net/core/skmsg.c @@ -655,6 +655,14 @@ static void sk_psock_backlog(struct work_struct *work) bool ingress; int ret; + /* Increment the psock refcnt to synchronize with close(fd) path in + * sock_map_close(), ensuring we wait for backlog thread completion + * before sk_socket freed. If refcnt increment fails, it indicates + * sock_map_close() completed with sk_socket potentially already freed. + */ + if (!sk_psock_get(psock->sk)) + return; + mutex_lock(&psock->work_mutex); if (unlikely(state->len)) { len = state->len; @@ -702,6 +710,7 @@ static void sk_psock_backlog(struct work_struct *work) } end: mutex_unlock(&psock->work_mutex); + sk_psock_put(psock->sk, psock); } struct sk_psock *sk_psock_init(struct sock *sk, int node) From patchwork Mon Mar 17 09:22:55 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiayuan Chen X-Patchwork-Id: 14018904 Received: from out-172.mta1.migadu.com (out-172.mta1.migadu.com [95.215.58.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 89CF6221F17 for ; Mon, 17 Mar 2025 09:23:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742203412; cv=none; b=EnR89Vc4ClnacGGo80bqcSHFtderje7QxnFM/kYc5G7n2VeihzvQViX2XeL6ccVDP/Jm15H9GOczKQca53L2cwl2n89LNJw7J0DoIRttYV+GhWUCQZEgyqWvEeyfA+xKeBDa0OIX2ca4CahcuYAflPj8JCS/nud5hod6Qoy9FiA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742203412; c=relaxed/simple; bh=ZIX3geUdBSeJYpNGzQADiA9T7cBZmrvzoLXT/2FyWtM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fYpMw8EDaD0q2FlfdxlS8YoWYn7cz1YHHq3JY6yXwwG1z3FAg70JjX9d5I6B1cKNDmw3cOpI46pXlDpnqY0aJyDvQ3VC2nSL/eyeCTjmjy11GnNVYfgyE9/a2VNS1X408txwrVo1rp1/4jZv0ssOZpntuZZ56DPst8mtA3tHEaI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=kjeZM4wm; arc=none smtp.client-ip=95.215.58.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="kjeZM4wm" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1742203408; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jdwQIuLJzVvoXmm2B8tL+Siu69JpG95Yy4OLKWooBQA=; b=kjeZM4wmaAXTcUfazsjza9u4rHM+R+vbSP+IntEAgmWUMWpxLnLT1Gb9BFg9iGW1tCV4AC dMChDBqgXiaCabRuKNzN6muJoubLdZYMtSM1c4ezMPVXBFMYdVpppJqYQ4oq1URlQJUP0S fkKQR2eOiJLoPwDXWoSgwwZ0bR3s0Dk= From: Jiayuan Chen To: xiyou.wangcong@gmail.com, john.fastabend@gmail.com, jakub@cloudflare.com Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, andrii@kernel.org, eddyz87@gmail.com, mykolal@fb.com, ast@kernel.org, daniel@iogearbox.net, martin.lau@linux.dev, song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, shuah@kernel.org, mhal@rbox.co, jiayuan.chen@linux.dev, sgarzare@redhat.com, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, syzbot+dd90a702f518e0eac072@syzkaller.appspotmail.com Subject: [PATCH bpf-next v3 2/3] bpf, sockmap: avoid using sk_socket after free when reading Date: Mon, 17 Mar 2025 17:22:55 +0800 Message-ID: <20250317092257.68760-3-jiayuan.chen@linux.dev> In-Reply-To: <20250317092257.68760-1-jiayuan.chen@linux.dev> References: <20250317092257.68760-1-jiayuan.chen@linux.dev> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT There are potential concurrency issues, as shown below. ''' CPU0 CPU1 sk_psock_verdict_data_ready: socket *sock = sk->sk_socket if (!sock) return close(fd): ... ops->release() if (!sock->ops) return sock->ops = NULL rcu_call(sock) free(sock) READ_ONCE(sock->ops) ^ use 'sock' after free ''' RCU is not applicable to Unix sockets read path, because the Unix socket implementation itself assumes it's always in process context and heavily uses mutex_lock, so, we can't call read_skb within rcu lock. Incrementing the psock reference count would not help either, since sock_map_close() does not wait for data_ready() to complete its execution. While we don't utilize sk_socket here, implementing read_skb at the sock layer instead of socket layer might be architecturally preferable ? However, deferring this optimization as current fix adequately addresses the immediate issue. Fixes: c63829182c37 ("af_unix: Implement ->psock_update_sk_prot()") Reported-by: syzbot+dd90a702f518e0eac072@syzkaller.appspotmail.com Closes: https://lore.kernel.org/bpf/6734c033.050a0220.2a2fcc.0015.GAE@google.com/ Signed-off-by: Jiayuan Chen --- net/core/skmsg.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/net/core/skmsg.c b/net/core/skmsg.c index 6101c1bb279a..5e913b62929e 100644 --- a/net/core/skmsg.c +++ b/net/core/skmsg.c @@ -1231,17 +1231,24 @@ static int sk_psock_verdict_recv(struct sock *sk, struct sk_buff *skb) static void sk_psock_verdict_data_ready(struct sock *sk) { - struct socket *sock = sk->sk_socket; + struct socket *sock; const struct proto_ops *ops; int copied; trace_sk_data_ready(sk); - if (unlikely(!sock)) + rcu_read_lock(); + sock = sk->sk_socket; + if (unlikely(!sock)) { + rcu_read_unlock(); return; + } ops = READ_ONCE(sock->ops); - if (!ops || !ops->read_skb) + if (!ops || !ops->read_skb) { + rcu_read_unlock(); return; + } + rcu_read_unlock(); copied = ops->read_skb(sk, sk_psock_verdict_recv); if (copied >= 0) { struct sk_psock *psock; From patchwork Mon Mar 17 09:22:56 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiayuan Chen X-Patchwork-Id: 14018905 Received: from out-188.mta1.migadu.com (out-188.mta1.migadu.com [95.215.58.188]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D16BE22259D; Mon, 17 Mar 2025 09:23:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.188 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742203423; cv=none; b=biZIsp/URFnalQ/glTyhT/VXiZDJ4FkAEjrC8xiGFU1vytMrpqKon+LsLZwMVxcG1pEQ3igzqbfLhxLU1RonjP+oWSXQ2c+zPSXwNy7Vww67bqwW7ObPJa/UDtPp70zRO5VZDPzKhh61b/xG/Ec05/xFk8HTJODmeBFN0Z71x/Q= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742203423; c=relaxed/simple; bh=ZOHoR1DVLuoqBGux5wOEYgvMSK5hDjDDqM2npNWq+30=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IKwCFQFZznTZ8OF9g/FGNjYDaVwrD7oHCfiwFqgZyROUs4kVn1HGfmGWLbwGjXpm+WuxHpR5woaWoVTYJUpZQba6BSSqHs/W4R0jRk8zdSI/siUBPcSJeeG2UOMcniSyQqq/oNGEPK219Hjcz5PMUdC3ZbT8iajTzV/Ka+5TtI4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=RNA2CAAn; arc=none smtp.client-ip=95.215.58.188 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="RNA2CAAn" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1742203419; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=BLSYPFz/nwodbHpxtrd6necAV0xMxciGJi0Eu7RL7/E=; b=RNA2CAAnuPOFBDghPRo59PAWyHNhb/EZS0Iojw2W4OL9J7bW9AOp3MYTnEYVcExyrnymyM 6xFpwefmKLIQY6JiKke1uaAlB764IntP1LH3Mq8LnS4puuSRhXKauBLXb9eyal2rJo3HeX wdhm4ypkvHh6qn+dmKe8Jy3AUNt2yms= From: Jiayuan Chen To: xiyou.wangcong@gmail.com, john.fastabend@gmail.com, jakub@cloudflare.com Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, andrii@kernel.org, eddyz87@gmail.com, mykolal@fb.com, ast@kernel.org, daniel@iogearbox.net, martin.lau@linux.dev, song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, shuah@kernel.org, mhal@rbox.co, jiayuan.chen@linux.dev, sgarzare@redhat.com, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH bpf-next v3 3/3] selftests/bpf: Add edge case tests for sockmap Date: Mon, 17 Mar 2025 17:22:56 +0800 Message-ID: <20250317092257.68760-4-jiayuan.chen@linux.dev> In-Reply-To: <20250317092257.68760-1-jiayuan.chen@linux.dev> References: <20250317092257.68760-1-jiayuan.chen@linux.dev> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Add edge case tests for sockmap. Signed-off-by: Jiayuan Chen --- .../selftests/bpf/prog_tests/socket_helpers.h | 13 +++- .../selftests/bpf/prog_tests/sockmap_basic.c | 60 +++++++++++++++++++ 2 files changed, 72 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/prog_tests/socket_helpers.h b/tools/testing/selftests/bpf/prog_tests/socket_helpers.h index 1bdfb79ef009..a805143dd84f 100644 --- a/tools/testing/selftests/bpf/prog_tests/socket_helpers.h +++ b/tools/testing/selftests/bpf/prog_tests/socket_helpers.h @@ -313,11 +313,22 @@ static inline int recv_timeout(int fd, void *buf, size_t len, int flags, static inline int create_pair(int family, int sotype, int *p0, int *p1) { - __close_fd int s, c = -1, p = -1; + __close_fd int s = -1, c = -1, p = -1; struct sockaddr_storage addr; socklen_t len = sizeof(addr); int err; + if (family == AF_UNIX) { + int fds[2]; + + err = socketpair(family, sotype, 0, fds); + if (!err) { + *p0 = fds[0]; + *p1 = fds[1]; + } + return err; + } + s = socket_loopback(family, sotype); if (s < 0) return s; diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c index 1e3e4392dcca..c72357f41035 100644 --- a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c +++ b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c @@ -1042,6 +1042,59 @@ static void test_sockmap_vsock_unconnected(void) xclose(map); } +void *close_thread(void *arg) +{ + int *fd = (int *)arg; + + sleep(1); + close(*fd); + *fd = -1; + return NULL; +} + +void test_sockmap_with_close_on_write(int family, int sotype) +{ + struct test_sockmap_pass_prog *skel; + int err, map, verdict; + pthread_t tid; + int zero = 0; + int c = -1, p = -1; + + skel = test_sockmap_pass_prog__open_and_load(); + if (!ASSERT_OK_PTR(skel, "open_and_load")) + return; + + verdict = bpf_program__fd(skel->progs.prog_skb_verdict); + map = bpf_map__fd(skel->maps.sock_map_rx); + + err = bpf_prog_attach(verdict, map, BPF_SK_SKB_STREAM_VERDICT, 0); + if (!ASSERT_OK(err, "bpf_prog_attach")) + goto out; + + err = create_pair(family, sotype, &c, &p); + if (!ASSERT_OK(err, "create_pair")) + goto out; + + err = bpf_map_update_elem(map, &zero, &p, BPF_ANY); + if (!ASSERT_OK(err, "bpf_map_update_elem")) + goto out; + + err = pthread_create(&tid, 0, close_thread, &p); + if (!ASSERT_OK(err, "pthread_create")) + goto out; + + while (p > 0) + send(c, "a", 1, MSG_NOSIGNAL); + + pthread_join(tid, NULL); +out: + if (c > 0) + close(c); + if (p > 0) + close(p); + test_sockmap_pass_prog__destroy(skel); +} + void test_sockmap_basic(void) { if (test__start_subtest("sockmap create_update_free")) @@ -1108,4 +1161,11 @@ void test_sockmap_basic(void) test_sockmap_skb_verdict_vsock_poll(); if (test__start_subtest("sockmap vsock unconnected")) test_sockmap_vsock_unconnected(); + if (test__start_subtest("sockmap with write on close")) { + test_sockmap_with_close_on_write(AF_UNIX, SOCK_STREAM); + test_sockmap_with_close_on_write(AF_UNIX, SOCK_DGRAM); + test_sockmap_with_close_on_write(AF_INET, SOCK_STREAM); + test_sockmap_with_close_on_write(AF_INET, SOCK_DGRAM); + test_sockmap_with_close_on_write(AF_VSOCK, SOCK_STREAM); + } }