New subject: [Bug 26889] wineserver loses fd_ops in debugging interface.

22 Apr 2011


      http://bugs.winehq.org/show_bug.cgi?id=26889
Summary: wineserver loses fd_ops in debugging interface.
           Product: Wine
           Version: unspecified
          Platform: x86
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wineserver
        AssignedTo: wine-bugs@winehq.org
        ReportedBy: wine@mkarcher.dialup.fu-berlin.de
Created an attachment (id=34287)
 --> (http://bugs.winehq.org/attachment.cgi?id=34287)
backtrace of the crash in wineserver
Since commit
 commit 900352bc6bd32c6524658083339ba119620be9c7
 Author: Alexandre Julliard julliard@winehq.org
 Date:   Mon Apr 18 14:14:40 2011 +0200
server: Store a mapping instead of a file for process dlls.
the dlls of a process posses a mapping instead of the original file object. The
consequence is that the only info about the fd is the the one contained in
mapping->fd, which is created by dup_fd_object. This copy does not include
fd_ops. Since commit
 commit 1b868f4967f2dadd1d12b2b0fc5a14f9c5766ab4
 Author: Alexandre Julliard julliard@winehq.org
 Date:   Tue Apr 19 10:29:44 2011 +0200
server: Fix sharing parameters for debug event files, and don't fail if
the file can't be opened.
this causes a crash in wineserver if programs are executed in the Borland
Delphi debugger. This is because the "hFile" object returned in the debugging
event refers to duplicate (again created by dup_fd_object) of mapping->fd.
Borland Delphi then tries to use SetFilePointer() and ReadFile() on that
object, and at that time, wineserver dereferences the NULL fd_ops in the fd
object and crashes.
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[Bug 26889] New: wineserver loses fd_ops in debugging interface.