CVE-2023-52735: bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself

First published: Tue May 21 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself sock_map proto callbacks should never call themselves by design. Protect against bugs like [1] and break out of the recursive loop to avoid a stack overflow in favor of a resource leak. [1] https://lore.kernel.org/all/00000000000073b14905ef2e7401@google.com/

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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