Bug report
Bug description:
Found (accidentally) by our OSS Fuzz fuzzer in #493449985.
The encodings.search_function() caches every codec lookup miss in an unbounded _cache dict, causing memory growth (the fuzzer gathered a 2561Mb cache causing the abort).
I would suggest we bound its size like we do elsewhere (e.g. the struct cache).
Technically, there is the possibility of a DoS vulnerability, however the PSRT decided that it is unrealistic for this to be exploited.
CPython versions tested on:
CPython main branch, 3.15, 3.14, 3.13
Operating systems tested on:
No response