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  1. Core ReactOS
  2. CORE-20559

Use of uninitialized memory in the functions WriteFile and ReadFile

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Details

    • Bug
    • Resolution: Unresolved
    • Major
    • None
    • RosDlls

    Description

      ReactOS: 0.4.16

      Module: Kernel32

      Patch included.

      test.cpp - Test program demonstrating the issue

      The issue may cause Total Commander to crash in debug build, also it's confirmed to block ReactOS building on itself, as was reported in CORE-20612.

      The problem stems from the use of uninitialized memory.
      In the file dll\win32\kernel32\client\file\rw.c, specifically in the functions WriteFile and ReadFile, the Iosb.Information field is used without initialization:

                *lpNumberOfBytesWritten = Iosb.Information; // BUG1
      		 
                *lpNumberOfBytesRead = Iosb.Information; // BUG2

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          blocks

          Bug - A problem which impairs or prevents the functions of the product. CORE-17376 Calibre 2.0.0 doesn't convert ebooks.

          • Major - Major loss of function.
          • Resolved

          Improvement - An improvement or enhancement to an existing feature or task. CORE-20548 Sync all wine components to Wine-10.0

          • Major - Major loss of function.
          • Untriaged
          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. CORE-20612 After commit of 5e998de cannot build ReactOS in itself

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

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              Unassigned Unassigned
              Aliaksandr Aliaksandr
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              Dates

                Created:
                Updated: