Commits on Sep 22, 2023

1. [hwasan] Fixing false invalid-free with disabled tagging …

   This problem was accidentally discovered by the internal symbolizer, but
   it's relevant for external one as well, see the test.
   
   If we just disable tagging, there may still be tagged allocations that
   have already been freed. After disabling tagging, these tagged
   allocations can be released to the user as-is, which would later break
   the "invalid-free" check.
   
   We cannot just disable the "invalid-free" check with disabled tagging,
   because if we re-enable tagging, the issue still applies to allocations
   created when it was disabled.
   
   The fix is to continue tagging with zero even if tagging is disabled.
   
   This makes the "disabled" mode less efficient, but this is not the
   primary use case.

   

   vitalybuka committed Sep 22, 2023
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