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[PR #12340] Fix a memory leak in onecore interactivity #29000

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opened 2026-01-31 09:32:10 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 09:32:10 +00:00
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Original Pull Request: https://github.com/microsoft/terminal/pull/12340

State: closed
Merged: Yes

As noted in #6759:

RtlCreateUnicodeString creates a copy of the string on the process heap and the PortName variable has local-scope. The string doesn't get freed with RtlFreeUnicodeString before the function returns creating a memory leak.
CIS_ALPC_PORT_NAME is a constant string and the PortName variable should instead be initialized using the RTL_CONSTANT_STRING macro:

static UNICODE_STRING PortName = RTL_CONSTANT_STRING(CIS_ALPC_PORT_NAME);

I actually built this in the OS repo to make sure it'll still build, because this code doesn't even build outside Windows.

**Original Pull Request:** https://github.com/microsoft/terminal/pull/12340 **State:** closed **Merged:** Yes --- As noted in #6759: > `RtlCreateUnicodeString` creates a copy of the string on the process heap and the `PortName` variable has local-scope. The string doesn't get freed with `RtlFreeUnicodeString` before the function returns creating a memory leak. > `CIS_ALPC_PORT_NAME` is a constant string and the `PortName` variable should instead be initialized using the `RTL_CONSTANT_STRING` macro: > > ```c++ > static UNICODE_STRING PortName = RTL_CONSTANT_STRING(CIS_ALPC_PORT_NAME); > ``` I actually built this in the OS repo to make sure it'll still build, because this code doesn't even build outside Windows. * [x] Closes #6759 * I work here.
claunia added the pull-request label 2026-01-31 09:32:10 +00:00
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Reference: starred/terminal#29000
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