fix: bound sys.stdin.read() to prevent OOM on oversized payloads - #3903
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Quratulain-bilal wants to merge 1 commit into
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fix: bound sys.stdin.read() to prevent OOM on oversized payloads#3903Quratulain-bilal wants to merge 1 commit into
Quratulain-bilal wants to merge 1 commit into
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sys.stdin.read() loads all of stdin into memory with no size limit. A malfunctioning agent hook can pipe gigabytes of data, exhausting process memory. Cap reads at 10 MiB in both the CLI event runner and the standalone events entry point.
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Problem
sys.stdin.read()loads all of stdin into memory with no size limit. A malfunctioning agent hook or malicious process can pipe gigabytes of data into stdin, exhausting process memory before the payload is ever consumed.This affects both the CLI event runner (
commands/event.py) and the standalone events entry point (events.py).Fix
Cap stdin reads at 10 MiB using a bounded chunked read loop. The function reads in 64 KiB chunks and stops once the limit is reached, preventing unbounded memory allocation.
Testing