[fix](load_stream) Fix use-after-free in TabletStream async lambdas #60148
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Pull request overview
This PR fixes a use-after-free bug in TabletStream where async lambdas captured raw this pointers that could become dangling when the TabletStream object is destroyed before async tasks complete (e.g., when thrift connection is broken).
Changes:
- Made TabletStream inherit from
std::enable_shared_from_this<TabletStream>to enable safe shared_ptr capture - Updated async lambdas in
append_data(),add_segment(), and_run_in_heavy_work_pool()to captureshared_from_this()instead of rawthis - Replaced all member access in async lambdas from direct access to
self->member access pattern
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| be/src/runtime/load_stream.h | Added std::enable_shared_from_this<TabletStream> inheritance to TabletStream class |
| be/src/runtime/load_stream.cpp | Updated three async lambda captures in TabletStream methods to use shared_from_this() instead of raw this pointer, ensuring object lifetime safety |
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TPC-H: Total hot run time: 31003 ms |
TPC-DS: Total hot run time: 173013 ms |
The async lambdas in TabletStream captured raw 'this' pointer, which could become dangling when the TabletStream object is destroyed before the async task completes (e.g., when thrift connection is broken). Fix by using shared_from_this() to capture shared_ptr instead of raw pointer, ensuring the object stays alive until all async tasks complete.
ClickBench: Total hot run time: 26.72 s |
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run buildall |
TPC-H: Total hot run time: 31159 ms |
TPC-DS: Total hot run time: 172530 ms |
ClickBench: Total hot run time: 26.95 s |
BE UT Coverage ReportIncrement line coverage Increment coverage report
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gavinchou
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Jan 22, 2026
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PR approved by at least one committer and no changes requested. |
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PR approved by anyone and no changes requested. |
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What problem does this PR solve?
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
The async lambdas in TabletStream captured raw 'this' pointer, which could become dangling when the TabletStream object is destroyed before the async task completes (e.g., when thrift connection is broken).
Fix by using shared_from_this() to capture shared_ptr instead of raw pointer, ensuring the object stays alive until all async tasks complete.
Release note
None
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Behavior changed:
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