Description
In the Linux kernel, the following vulnerability has been resolved: bpf: drop unnecessary user-triggerable WARN_ONCE in verifierl log It's trivial for user to trigger "verifier log line truncated" warning, as verifier has a fixed-sized buffer of 1024 bytes (as of now), and there are at least two pieces of user-provided information that can be output through this buffer, and both can be arbitrarily sized by user: - BTF names; - BTF.ext source code lines strings. Verifier log buffer should be properly sized for typical verifier state output. But it's sort-of expected that this buffer won't be long enough in some circumstances. So let's drop the check. In any case code will work correctly, at worst truncating a part of a single line output.
Product status
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 40c88c429a598006f91ad7a2b89856cd50b3a008
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 926a175026fed5d534f587ea4ec3ec49265cd3c5
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before cff36398bd4c7d322d424433db437f3c3391c491
6.1.107 (semver)
6.4.7 (semver)
6.5 (original_commit_for_fix)
References
git.kernel.org/...c/40c88c429a598006f91ad7a2b89856cd50b3a008
git.kernel.org/...c/926a175026fed5d534f587ea4ec3ec49265cd3c5
git.kernel.org/...c/cff36398bd4c7d322d424433db437f3c3391c491
Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.
