Wasmtime GitHub notifications bot (Oct 16 2024 at 06:35): Wasmtime GitHub notifications bot (Oct 16 2024 at 06:35):alexcrichton opened PR #9475 from alexcrichton:fix-timeout to bytecodealliance:main:
This commit fixes a timeout that was found by OSS-Fuzz recently where a module was calling
memory.growmany times, presumably in a loop, with a modest amount each time. This meant thatmemory.growwas taking, in total, a quadratic amount of time because Wasmtime was configured with dynamic memories and no memory was reserved for growth. That in turn meant that the test case eventually timed out due to this quadratic behavior.To fix this in addition to the memory allocation cap that we already track a new cap for the number of times memories/tables can be grown was also added. Any growth beyond this limit is rejected and helps prevent this quadratic behavior.
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Wasmtime GitHub notifications bot (Oct 16 2024 at 06:35):alexcrichton requested fitzgen for a review on PR #9475.
Wasmtime GitHub notifications bot (Oct 16 2024 at 06:35):alexcrichton requested wasmtime-fuzz-reviewers for a review on PR #9475.
Last updated: Dec 23 2024 at 12:05 UTC