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mountmgr: Enforce a minimal length for the mount point id.

This commit is contained in:
Alexandre Julliard 2008-10-17 19:57:43 +02:00
parent 881e30b4d1
commit a12789e97e
1 changed files with 18 additions and 14 deletions
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32
dlls/mountmgr.sys/mountmgr.c
View File

@ -42,6 +42,7 @@
WINE_DEFAULT_DEBUG_CHANNEL(mountmgr);
#define MIN_ID_LEN 4
#define MAX_DOS_DRIVES 26
#define MAX_MOUNT_POINTS (2 * MAX_DOS_DRIVES)
@ -167,6 +168,18 @@ static NTSTATUS create_disk_device( DRIVER_OBJECT *driver, DWORD type, DEVICE_OB
}
static void set_mount_point_id( struct mount_point *mount, const void *id, unsigned int id_len )
{
RtlFreeHeap( GetProcessHeap(), 0, mount->id );
mount->id_len = max( MIN_ID_LEN, id_len );
if ((mount->id = RtlAllocateHeap( GetProcessHeap(), HEAP_ZERO_MEMORY, mount->id_len )))
{
memcpy( mount->id, id, id_len );
RegSetValueExW( mount_key, mount->link.Buffer, 0, REG_BINARY, mount->id, mount->id_len );
}
else mount->id_len = 0;
}
static NTSTATUS add_mount_point( DRIVER_OBJECT *driver, DWORD type, int drive,
const void *id, unsigned int id_len )
{
@ -219,12 +232,8 @@ static NTSTATUS add_mount_point( DRIVER_OBJECT *driver, DWORD type, int drive,
}
mount_volume->device = mount_drive->device; /* FIXME: incr ref count */
mount_drive->id = RtlAllocateHeap( GetProcessHeap(), 0, id_len );
mount_drive->id_len = id_len;
memcpy( mount_drive->id, id, id_len );
mount_volume->id = RtlAllocateHeap( GetProcessHeap(), 0, id_len );
mount_volume->id_len = id_len;
memcpy( mount_volume->id, id, id_len );
set_mount_point_id( mount_drive, id, id_len );
set_mount_point_id( mount_volume, id, id_len );
IoCreateSymbolicLink( &mount_drive->link, get_device_name(mount_drive->device) );
IoCreateSymbolicLink( &mount_volume->link, get_device_name(mount_volume->device) );
@ -232,11 +241,6 @@ static NTSTATUS add_mount_point( DRIVER_OBJECT *driver, DWORD type, int drive,
TRACE( "created device %s symlinks %s %s\n", debugstr_w(get_device_name(mount_drive->device)->Buffer),
debugstr_w(mount_drive->link.Buffer), debugstr_w(mount_volume->link.Buffer) );
RegSetValueExW( mount_key, mount_drive->link.Buffer, 0, REG_BINARY,
mount_drive->id, mount_drive->id_len );
RegSetValueExW( mount_key, mount_volume->link.Buffer, 0, REG_BINARY,
mount_volume->id, mount_volume->id_len );
return STATUS_SUCCESS;
}
@ -291,7 +295,7 @@ static NTSTATUS query_mount_points( const void *in_buff, SIZE_T insize,
if (!matching_mount_point( &mount_points[i], input )) continue;
size += get_device_name(mount_points[i].device)->Length;
size += mount_points[i].link.Length;
size += strlen(mount_points[i].id) + 1;
size += mount_points[i].id_len;
size = (size + sizeof(WCHAR) - 1) & ~(sizeof(WCHAR) - 1);
j++;
}
@ -323,9 +327,9 @@ static NTSTATUS query_mount_points( const void *in_buff, SIZE_T insize,
pos += mount_points[i].link.Length;
info->MountPoints[j].UniqueIdOffset = pos;
info->MountPoints[j].UniqueIdLength = strlen(mount_points[i].id) + 1;
info->MountPoints[j].UniqueIdLength = mount_points[i].id_len;
memcpy( (char *)out_buff + pos, mount_points[i].id, strlen(mount_points[i].id) + 1 );
pos += strlen(mount_points[i].id) + 1;
pos += mount_points[i].id_len;
pos = (pos + sizeof(WCHAR) - 1) & ~(sizeof(WCHAR) - 1);
j++;
}