New subject: [Bug 54300] LdrLoadDll illegal memory access on DllPath

13 Jan 2023


      https://bugs.winehq.org/show_bug.cgi?id=54300
Bug ID: 54300
           Summary: LdrLoadDll illegal memory access on DllPath
           Product: Wine
           Version: 7.22
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: wine-bugs@winehq.org
          Reporter: novae.harpist06@icloud.com
      Distribution: ---
Created attachment 73867
  --> https://bugs.winehq.org/attachment.cgi?id=73867
Reproducer
See reproducer (attached)
DllPath can be search flags, which is indicated by passing a pointer where the
lowest bit is set. This is not handled in wine, which calls wcslen on it: 
https://github.com/wine-mirror/wine/blob/a8c1d5c108fc57e4d78e9db126f395c8908...
The path resolution is correctly implemented in LdrGetDllPath, but that
function is not used (besides being an export).
Windows output:
Trying flag 00000200
Trying flag 00000400
Trying flag 00000800
Trying flag 00001000
Trying flag 00002000
Trying flag 00004000
Wine output:
Trying flag 00000200
wine: Unhandled page fault on read access to 0000000000000201 at address
0000000170069B40 (thread 05ec), starting debugger...
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[Bug 54300] New: LdrLoadDll illegal memory access on DllPath