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Verifier stucks while verifying the loop program #545

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pcy190 opened this issue Dec 12, 2023 · 0 comments
Open

Verifier stucks while verifying the loop program #545

pcy190 opened this issue Dec 12, 2023 · 0 comments

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@pcy190
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pcy190 commented Dec 12, 2023

ebpf-verifier-check stuck while verifying the following program with the default option (i.e., the termination check is disabled by default):

the hex dump of the instruction stream:

0f57 0000 0000 0003 0020 0000 0000 0000
00c7 0000 0001 61df 6063 7465 0000 0000
0065 fffc 0008 ff00 00c7 0000 0085 ab01
0005 fffe 0000 0000 

the assembly format of this instruction stream:

        0:      r15 &= 196608
       1:       r0 = *(u32 *)skb[]
       2:       r0 >>>= 1642004481
       3:       *(u32 *)(r0 + 29797) = r6
       4:       if r0 s> -16777208 goto -4 <1>
       5:       r0 >>>= -1425997691
       6:       goto -2 <5>
@pcy190 pcy190 changed the title Stuck while verifying the loop program Verifier stucks while verifying the loop program Dec 12, 2023
Alan-Jowett pushed a commit to Alan-Jowett/ebpf-verifier that referenced this issue Oct 15, 2024
vbpf#545)

Bumps [external/bpf_conformance](https://github.com/Alan-Jowett/bpf_conformance) from `a407af3` to `62e3f49`.
- [Release notes](https://github.com/Alan-Jowett/bpf_conformance/releases)
- [Commits](Alan-Jowett/bpf_conformance@a407af3...62e3f49)

---
updated-dependencies:
- dependency-name: external/bpf_conformance
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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