Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
selftests/bpf: Add selftests for the invocation of bpf_lwt_xmit_push_encap
Calling bpf_lwt_xmit_push_encap will not cause a crash when dst is missing.
Signed-off-by: Feng Yang <yangfeng@kylinos.cn>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20260304094429.168521-3-yangfeng59949@163.com
authored by
Feng Yang
and committed by
Martin KaFai Lau
e8ae16d6
97278747
+31
+9
tools/testing/selftests/bpf/prog_tests/lwt_misc.c
+9
tools/testing/selftests/bpf/prog_tests/lwt_misc.c
+22
tools/testing/selftests/bpf/progs/lwt_misc.c
+22
tools/testing/selftests/bpf/progs/lwt_misc.c
···
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// SPDX-License-Identifier: GPL-2.0
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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SEC("lwt_xmit")
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__success __retval(0)
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int test_missing_dst(struct __sk_buff *skb)
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{
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struct iphdr iph;
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__builtin_memset(&iph, 0, sizeof(struct iphdr));
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iph.ihl = 5;
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iph.version = 4;
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bpf_lwt_push_encap(skb, BPF_LWT_ENCAP_IP, &iph, sizeof(struct iphdr));
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return 0;
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}
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char _license[] SEC("license") = "GPL";