fix compat handling of FICLONERANGE, FIDEDUPERANGE and FS_IOC_FIEMAP

commit 6b2daec1 upstream.

Unlike FICLONE, all of those take a pointer argument; they do need
compat_ptr() applied to arg.

Fixes: d79bdd52 ("vfs: wire up compat ioctl for CLONE/CLONE_RANGE")
Fixes: 54dbc151 ("vfs: hoist the btrfs deduplication ioctl to the vfs")
Fixes: ceac204e ("fs: make fiemap work from compat_ioctl")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/compat_ioctl.c

@@ -1401,10 +1401,11 @@ COMPAT_SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd,
 #endif
 
 	case FICLONE:
+		goto do_ioctl;
 	case FICLONERANGE:
 	case FIDEDUPERANGE:
 	case FS_IOC_FIEMAP:
-		goto do_ioctl;
+		goto found_handler;
 
 	case FIBMAP:
 	case FIGETBSZ: