Stream: git-wasmtime

Topic: wasmtime / PR #14626 component(err-ctx): trap on a misali...

view this post on Zulip Wasmtime GitHub notifications bot (Oct 09 2026 at 16:03):

rvolosatovs opened PR #14626 from rvolosatovs:fix/err-ctx-align to bytecodealliance:main:

error-context.debug-message bounds-checked the guest-provided destination pointer for the string's (ptr, len) pair, but not its alignment, and then wrote the pair via
<str as Lower>::linear_lower_to_memory, which debug_assert!s that the offset is 4-byte aligned. A guest passing an in-bounds but misaligned pointer could therefore panic the host in debug builds, while release builds performed the unaligned write.

Check the pointer's alignment before lowering and trap with "invalid debug message pointer: not aligned", the same way the stream/future read and write paths in this file report misaligned pointers.

view this post on Zulip Wasmtime GitHub notifications bot (Oct 09 2026 at 16:03):

rvolosatovs requested dicej for a review on PR #14626.

view this post on Zulip Wasmtime GitHub notifications bot (Oct 09 2026 at 16:03):

rvolosatovs requested wasmtime-core-reviewers for a review on PR #14626.

view this post on Zulip Wasmtime GitHub notifications bot (Oct 09 2026 at 16:03):

rvolosatovs has enabled auto merge for PR #14626.

view this post on Zulip Wasmtime GitHub notifications bot (Oct 09 2026 at 16:07):

:thumbs_up: alexcrichton submitted PR review.

view this post on Zulip Wasmtime GitHub notifications bot (Oct 09 2026 at 16:13):

rvolosatovs added PR #14626 component(err-ctx): trap on a misaligned pointer to the merge queue.

view this post on Zulip Wasmtime GitHub notifications bot (Oct 09 2026 at 16:37):

:check: rvolosatovs merged PR #14626.

view this post on Zulip Wasmtime GitHub notifications bot (Oct 09 2026 at 16:37):

rvolosatovs removed PR #14626 component(err-ctx): trap on a misaligned pointer from the merge queue.

Last updated: Oct 11 2026 at 04:10 UTC