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Fix crash on WinPE #163

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Fix crash on WinPE #163

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2138029
Detect RAM disks as a separate filesystem type
lesderid Jul 13, 2023
94f9378
Use init_reopen_attr in mmap
lesderid Jul 13, 2023
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2 changes: 2 additions & 0 deletions winsup/cygwin/local_includes/mount.h
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Expand Up @@ -47,6 +47,7 @@ enum fs_info_type
ncfsd,
afs,
prlfs,
ramdisk,
/* Always last. */
max_fs_type
};
Expand Down Expand Up @@ -117,6 +118,7 @@ class fs_info
IMPLEMENT_FS_FLAG (ncfsd)
IMPLEMENT_FS_FLAG (afs)
IMPLEMENT_FS_FLAG (prlfs)
IMPLEMENT_FS_FLAG (ramdisk)
fs_info_type what_fs () const { return status.fs_type; }
bool got_fs () const { return status.fs_type != none; }

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1 change: 1 addition & 0 deletions winsup/cygwin/local_includes/path.h
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Expand Up @@ -387,6 +387,7 @@ class path_conv
bool fs_is_ncfsd () const {return fs.is_ncfsd ();}
bool fs_is_afs () const {return fs.is_afs ();}
bool fs_is_prlfs () const {return fs.is_prlfs ();}
bool fs_is_ramdisk () const {return fs.is_ramdisk ();}
fs_info_type fs_type () const {return fs.what_fs ();}
ULONG fs_serial_number () const {return fs.serial_number ();}
inline const char *set_path (const char *p)
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5 changes: 2 additions & 3 deletions winsup/cygwin/mm/mmap.cc
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Expand Up @@ -956,11 +956,10 @@ mmap (void *addr, size_t len, int prot, int flags, int fd, off_t off)
HANDLE h;
IO_STATUS_BLOCK io;

InitializeObjectAttributes (&attr, &ro_u_empty, fh->pc.objcaseinsensitive (),
fh->get_handle (), NULL);
status = NtOpenFile (&h,
fh->get_access () | GENERIC_EXECUTE | SYNCHRONIZE,
&attr, &io, FILE_SHARE_VALID_FLAGS,
fh->pc.init_reopen_attr (attr, h), &io,
FILE_SHARE_VALID_FLAGS,
FILE_SYNCHRONOUS_IO_NONALERT
| FILE_OPEN_FOR_BACKUP_INTENT);
if (NT_SUCCESS (status))
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12 changes: 12 additions & 0 deletions winsup/cygwin/mount.cc
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Expand Up @@ -291,6 +291,17 @@ fs_info::update (PUNICODE_STRING upath, HANDLE in_vol)
if (!NT_SUCCESS (status))
ffdi.DeviceType = ffdi.Characteristics = 0;

if (upath->Buffer[5] == L':' && upath->Buffer[6] == L'\\')
{
WCHAR dos[3] = {upath->Buffer[4], upath->Buffer[5], L'\0'};
WCHAR dev[MAX_PATH];
if (QueryDosDeviceW (dos, dev, MAX_PATH))
{
is_ramdisk (wcsncmp (dev, L"\\Device\\Ramdisk", 15));
has_buggy_reopen (is_ramdisk ());
}
}

if ((ffdi.Characteristics & FILE_REMOTE_DEVICE)
|| (!ffdi.DeviceType
&& RtlEqualUnicodePathPrefix (attr.ObjectName, &ro_u_uncp, TRUE)))
Expand Down Expand Up @@ -1710,6 +1721,7 @@ fs_names_t fs_names[] = {
{ "ncfsd", false },
{ "afs", false },
{ "prlfs", false },
{ "ramdisk", false },
{ NULL, false }
};

Expand Down