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ntdll: Initialize mountmgr_unix_drive before NtDeviceIoControlFile (valgrind). 

Syscall param writev(vector[...]) points to uninitialised byte(s)
     at 0x4189DA3: writev (writev.c:26)
     by 0x46A5A1B: send_request (server.c:213)
     by 0x46A5A1B: server_call_unlocked (server.c:273)
     by 0x46CA54F: virtual_locked_server_call (virtual.c:2993)
     by 0x4681C9A: server_ioctl_file (file.c:4789)
     by 0x468B326: NtDeviceIoControlFile (file.c:5620)
     by 0x468B7AF: get_mountmgr_fs_info (file.c:1986)
     by 0x468B7AF: get_mountmgr_fs_info (file.c:1955)
     by 0x468FCBB: NtQueryVolumeInformationFile (file.c:6483)
     by 0x4677E88: __wine_syscall_dispatcher_xsave (in /home/rbernon/Code/build-wine/wine64/dlls/ntdll/ntdll.so)
     by 0x7BC0DEB3: NtQueryVolumeInformationFile (in /home/rbernon/Code/build-wine/wine64/dlls/ntdll/ntdll.dll)
     by 0x7B01F127: GetFileInformationByHandle (file.c:2938)
     by 0x7096A5C3: _fstat64 (file.c:1791)
     by 0x7096A941: _fstat64i32 (file.c:1877)
   Address 0x7ffffe30e520 is in a rw- anonymous segment

Signed-off-by: Rémi Bernon <rbernon@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Rémi Bernon 2021-03-08 09:14:20 +01:00 committed by Alexandre Julliard
parent f69e5478d5
commit 0eb3258a69
1 changed files with 1 additions and 1 deletions
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2
dlls/ntdll/unix/file.c
View File

@ -1963,13 +1963,13 @@ static NTSTATUS get_mountmgr_fs_info( HANDLE handle, int fd, struct mountmgr_uni
letter = find_dos_device( unix_name );
free( unix_name );
memset( drive, 0, sizeof(*drive) );
if (letter == -1)
{
struct stat st;
fstat( fd, &st );
drive->unix_dev = st.st_rdev ? st.st_rdev : st.st_dev;
drive->letter = 0;
}
else
drive->letter = 'a' + letter;