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| author | Hayzam Sherif <hayzam@gmail.com> | 2026-09-21 16:34:08 +0000 |
|---|---|---|
| committer | Mark Johnston <markj@FreeBSD.org> | 2026-09-21 16:36:11 +0000 |
| commit | ce5b70657f94d2051566664d3ea7167d104803b0 (patch) | |
| tree | 104b61394b18e3c34fd75c0aade89441b9b7acce /lldb/source/Plugins/ScriptInterpreter/Python/ScriptedThreadPythonInterface.cpp | |
| parent | d400b1ca31fd9b12655c83f9a7b3e8cdb68646dd (diff) | |
vmm: Fix a page wiring leak in MOVS emulation
When emulating a MOVS from MMIO to guest RAM, the kernel's
vm_copy_setup() wires the destination pages. If the subsequent
MMIO read fails, emulate_movs() skips vm_copy_teardown(), leaking
the page wire references acquired during setup.
Run vm_copy_teardown() regardless of the MMIO read result, and
only copy the value to guest memory if the read succeeds.
Preserve the existing error return.
This matches illumos change 13309.
Reviewed by: markj
Obtained from: illumos 83cd75bb2949d26e6eb38ddefc60fdeed1909643
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D59823
Diffstat (limited to 'lldb/source/Plugins/ScriptInterpreter/Python/ScriptedThreadPythonInterface.cpp')
0 files changed, 0 insertions, 0 deletions