[all-commits] [llvm/llvm-project] adcd28: [scudo] Return nullptr if a remap fails on linux. ...

[Christopher Ferris via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: adcd285fc4047759e4014d6568d80bb64589aded
      https://github.com/llvm/llvm-project/commit/adcd285fc4047759e4014d6568d80bb64589aded
  Author: Christopher Ferris <cferris1000 at users.noreply.github.com>
  Date:   2026-06-01 (Mon, 01 Jun 2026)

  Changed paths:
    M compiler-rt/lib/scudo/standalone/mem_map_linux.cpp
    M compiler-rt/lib/scudo/standalone/report_linux.cpp
    M compiler-rt/lib/scudo/standalone/report_linux.h
    M compiler-rt/lib/scudo/standalone/secondary.h
    M compiler-rt/lib/scudo/standalone/tests/report_test.cpp

  Log Message:
  -----------
  [scudo] Return nullptr if a remap fails on linux. (#200537)

Add a check if a fixed address mmap doesn't return the expected address.

Allow a remap call to fail if the mmap fails and returns a nullptr to
the caller.

Fix a place where if remap fails in the secondary, it didn't do
anything. Now it will unmap the original entry on failure.



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