New subject: [Bug 56093] msys/pacman: fails with "fixup_mmaps_after_fork: VirtualQueryEx failed"

26 Dec 2023


      https://bugs.winehq.org/show_bug.cgi?id=56093
Bug ID: 56093
           Summary: msys/pacman: fails with "fixup_mmaps_after_fork:
                    VirtualQueryEx failed"
           Product: Wine
           Version: 9.0-rc3
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: kernel32
          Assignee: wine-bugs@winehq.org
          Reporter: bernhardu@mailbox.org
      Distribution: ---
Updating a msys2 installation via "pacman -Suy" fails in below way.
This is a result of the parent process doing a DuplicateHandle with
PROCESS_QUERY_LIMITED_INFORMATION and inheriting this to the forked process.
This fork tries to recreate the mappings of the parent but fails
the VirtualQueryEx call with this inherited handle of the parent process.
It does fail because in wine it leads to a call to get_process_from_handle
with PROCESS_QUERY_INFORMATION which the handle was not created with.
msys2 does intentionally use PROCESS_QUERY_LIMITED_INFORMATION instead
of PROCESS_QUERY_INFORMATION with DuplicateHandle on windows 8.1 and up.
wine bash.exe --login
pacman -Suy
0 [main] pacman 1051 fixup_mmaps_after_fork: VirtualQueryEx failed for
MAP_PRIVATE address 0x6FFFFFFF0000, Win32 error 5
    562 [main] pacman 1051 C:\msys64\usr\bin\pacman.exe: *** fatal error in
forked process - recreate_mmaps_after_fork_failed
In the parent process:
https://github.com/msys2/msys2-runtime/blob/msys2-3.4.10/winsup/cygwin/sigpr...
In the child process:
https://github.com/msys2/msys2-runtime/blob/msys2-3.4.10/winsup/cygwin/mm/mm...
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[Bug 56093] New: msys/pacman: fails with "fixup_mmaps_after_fork: VirtualQueryEx failed"