http: fix use-after-free when freeParser is called during llhttp_execute#62095
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http: fix use-after-free when freeParser is called during llhttp_execute#62095Flarna wants to merge 1 commit intonodejs:mainfrom
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When pipelined requests arrive in one TCP segment, llhttp_execute() parses them all in a single call. If a synchronous 'close' event handler invokes freeParser() mid-execution, cleanParser() nulls out parser state while llhttp_execute() is still on the stack, crashing on the next callback. Add an is_being_freed_ flag that freeParser() sets via parser.markFreed() before cleaning state. Proxy::Raw checks the flag before every callback and returns HPE_USER to abort execution early if set.
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Codecov Report❌ Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #62095 +/- ##
==========================================
+ Coverage 89.64% 89.65% +0.01%
==========================================
Files 676 676
Lines 206326 206338 +12
Branches 39528 39524 -4
==========================================
+ Hits 184960 184996 +36
+ Misses 13476 13468 -8
+ Partials 7890 7874 -16
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When pipelined requests arrive in one TCP segment, llhttp_execute() parses them all in a single call. If a synchronous 'close' event handler invokes freeParser() mid-execution, cleanParser() nulls out parser state while llhttp_execute() is still on the stack, crashing on the next callback.
Add an is_being_freed_ flag that freeParser() sets via parser.markFreed() before cleaning state. Proxy::Raw checks the flag before every callback and returns HPE_USER to abort execution early if set.
Fix/test was created using AI support.
Refs: #61995 (comment)