D23386.diff
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	Index: head/sys/compat/linuxkpi/common/src/linux_compat.c
	===================================================================
	--- head/sys/compat/linuxkpi/common/src/linux_compat.c
	+++ head/sys/compat/linuxkpi/common/src/linux_compat.c
	@@ -1526,7 +1526,9 @@
	struct linux_file *filp;
	const struct file_operations *fop;
	struct linux_cdev *ldev;
	- int error;
	+ struct fiodgname_arg *fgn;
	+ const char *p;
	+ int error, i;

	error = 0;
	filp = (struct linux_file *)fp->f_data;
	@@ -1553,6 +1555,23 @@
	break;
	case FIOGETOWN:
	(int )data = fgetown(&filp->f_sigio);
	+ break;
	+ case FIODGNAME:
	+#ifdef COMPAT_FREEBSD32
	+ case FIODGNAME_32:
	+#endif
	+ if (filp->f_cdev == NULL \|\| filp->f_cdev->cdev == NULL) {
	+ error = ENXIO;
	+ break;
	+ }
	+ fgn = data;
	+ p = devtoname(filp->f_cdev->cdev);
	+ i = strlen(p) + 1;
	+ if (i > fgn->len) {
	+ error = EINVAL;
	+ break;
	+ }
	+ error = copyout(p, fiodgname_buf_get_ptr(fgn, cmd), i);
	break;
	default:
	error = linux_file_ioctl_sub(fp, filp, fop, cmd, data, td);