dfb7539b47
This patch expands test coverage for EPERM tests to include connect and bind calls and rounds out the coverage for sendmsg by adding tests for sendmsg_unix. Signed-off-by: Jordan Rife <jrife@google.com> Link: https://lore.kernel.org/r/20240510190246.3247730-16-jrife@google.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
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#include "vmlinux.h"
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#include <string.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_core_read.h>
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#include "bpf_kfuncs.h"
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__u8 SERVUN_REWRITE_ADDRESS[] = "\0bpf_cgroup_unix_test_rewrite";
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SEC("cgroup/sendmsg_unix")
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int sendmsg_unix_prog(struct bpf_sock_addr *ctx)
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{
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struct bpf_sock_addr_kern *sa_kern = bpf_cast_to_kern_ctx(ctx);
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struct sockaddr_un *sa_kern_unaddr;
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__u32 unaddrlen = offsetof(struct sockaddr_un, sun_path) +
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sizeof(SERVUN_REWRITE_ADDRESS) - 1;
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int ret;
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/* Rewrite destination. */
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ret = bpf_sock_addr_set_sun_path(sa_kern, SERVUN_REWRITE_ADDRESS,
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sizeof(SERVUN_REWRITE_ADDRESS) - 1);
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if (ret)
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return 0;
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if (sa_kern->uaddrlen != unaddrlen)
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return 0;
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sa_kern_unaddr = bpf_core_cast(sa_kern->uaddr, struct sockaddr_un);
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if (memcmp(sa_kern_unaddr->sun_path, SERVUN_REWRITE_ADDRESS,
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sizeof(SERVUN_REWRITE_ADDRESS) - 1) != 0)
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return 0;
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return 1;
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}
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SEC("cgroup/sendmsg_unix")
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int sendmsg_unix_deny_prog(struct bpf_sock_addr *ctx)
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{
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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