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f1c025773f
The selftest can reproduce an issue where using bpf_msg_pop_data() in ktls causes errors on the receiving end. Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20250609020910.397930-3-jiayuan.chen@linux.dev
40 lines
830 B
C
40 lines
830 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_endian.h>
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int cork_byte;
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int push_start;
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int push_end;
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int apply_bytes;
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int pop_start;
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int pop_end;
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struct {
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__uint(type, BPF_MAP_TYPE_SOCKMAP);
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__uint(max_entries, 20);
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__type(key, int);
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__type(value, int);
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} sock_map SEC(".maps");
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SEC("sk_msg")
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int prog_sk_policy(struct sk_msg_md *msg)
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{
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if (cork_byte > 0)
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bpf_msg_cork_bytes(msg, cork_byte);
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if (push_start > 0 && push_end > 0)
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bpf_msg_push_data(msg, push_start, push_end, 0);
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if (pop_start >= 0 && pop_end > 0)
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bpf_msg_pop_data(msg, pop_start, pop_end, 0);
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return SK_PASS;
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}
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SEC("sk_msg")
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int prog_sk_policy_redir(struct sk_msg_md *msg)
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{
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int two = 2;
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bpf_msg_apply_bytes(msg, apply_bytes);
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return bpf_msg_redirect_map(msg, &sock_map, two, 0);
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}
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