Oxenstored 32->31 bit integer truncation issues Integers in Ocaml are 63 or 31 bits of signed precision. The Ocaml Xenbus library takes a C uint32_t out of the ring and casts it directly to an Ocaml integer. In 64-bit Ocaml builds this is fine, but in 32-bit builds, it truncates off the most significant bit, and then creates unsigned/signed confusion in the remainder. This in turn can feed a negative value into logic not expecting a negative value, resulting in unexpected exceptions being thrown. The unexpected exception is not handled suitably, creating a busy-loop trying (and failing) to take the bad packet out of the xenstore ring.
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History
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MITRE Information
Status: PUBLISHED
Assigner: XEN
Published: 2022-11-01T00:00:00
Updated: 2024-02-04T08:07:22.705948
Reserved: 2022-10-03T00:00:00
Link: CVE-2022-42324
JSON object: View
NVD Information
Status : Modified
Published: 2022-11-01T13:15:12.017
Modified: 2024-02-04T08:15:12.647
Link: CVE-2022-42324
JSON object: View
Redhat Information
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CWE