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      <title>CVE-2024-46754 — bpf: Remove tst_run from lwt_seg6local_prog_ops.</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2024-46754</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;bpf: Remove tst_run from lwt_seg6local_prog_ops.&lt;/p&gt;
&lt;p&gt;The syzbot reported that the lwt_seg6 related BPF ops can be invoked
via bpf_test_run() without without entering input_action_end_bpf()
first.&lt;/p&gt;
&lt;p&gt;Martin KaFai Lau said that self test for BPF_PROG_TYPE_LWT_SEG6LOCAL
probably didn&amp;#39;t work since it was introduced in commit 04d4b274e2a
(&amp;#34;ipv6: sr: Add seg6local action End.BPF&amp;#34;). The reason is that the
per-CPU variable seg6_bpf_srh_states::srh is never assigned in the self
test case but each BPF function expects it.&lt;/p&gt;
&lt;p&gt;Remove test_run for BPF_PROG_TYPE_LWT_SEG6LOCAL.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;bpf: Remove tst_run from lwt_seg6local_prog_ops.&lt;/p&gt;
&lt;p&gt;The syzbot reported that the lwt_seg6 related BPF ops can be invoked
via bpf_test_run() without without entering input_action_end_bpf()
first.&lt;/p&gt;
&lt;p&gt;Martin KaFai Lau said that self test for BPF_PROG_TYPE_LWT_SEG6LOCAL
probably didn&amp;#39;t work since it was introduced in commit 04d4b274e2a
(&amp;#34;ipv6: sr: Add seg6local action End.BPF&amp;#34;). The reason is that the
per-CPU variable seg6_bpf_srh_states::srh is never assigned in the self
test case but each BPF function expects it.&lt;/p&gt;
&lt;p&gt;Remove test_run for BPF_PROG_TYPE_LWT_SEG6LOCAL.&lt;/p&gt;</content:encoded>
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