tree e8292c6b9d57362244b8714713bb803c91d12329
parent f1bb2fe3562d2fe9a43c79ec8af908fdff23a33a
author Naveen Seth Hanig <naveen.hanig@outlook.com> 1744081377 +0200
committer GitHub <noreply@github.com> 1744081377 +0800
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[clang][modules] Guard against bad -fmodule-file mappings (#132059) (#133462)

Fix https://github.com/llvm/llvm-project/issues/132059.

Providing incorrect mappings via `-fmodule-file=<name>=<path/to/bmi>`
can crash the compiler when loading a module that imports an
incorrectly mapped module.

The crash occurs during AST body deserialization, when the compiler
attempts to resolve remappings using the `ModuleFile` from the
incorrectly mapped module's BMI file.
The cause is an invalid access into an incorrectly loaded
`ModuleFile`.

This commit fixes the issue by verifying the identity of the imported
module.