FreeBSD: Fix legacy compat for platform IOCs

The request number is out of bounds of the platform table. Subtract the starting offset to get the correct subscript. Reviewed-by: Alexander Motin <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Ryan Moeller <[email protected]> Closes openzfs#10994
jsai20 · Mar 30, 2021 · 45fb507 · 45fb507
1 parent e6a356e
commit 45fb507
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/module/os/freebsd/zfs/zfs_ioctl_compat.c b/module/os/freebsd/zfs/zfs_ioctl_compat.c
@@ -322,8 +322,10 @@ zfs_ioctl_ozfs_to_legacy(int request)
 	if (request > ZFS_IOC_LAST)
 		return (-1);
 
-	if (request > ZFS_IOC_PLATFORM)
+	if (request > ZFS_IOC_PLATFORM) {
+		request -= ZFS_IOC_PLATFORM + 1;
 		return (zfs_ioctl_ozfs_to_legacy_platform_[request]);
+	}
 	if (request >= sizeof (zfs_ioctl_ozfs_to_legacy_common_)/sizeof (long))
 		return (-1);
 	return (zfs_ioctl_ozfs_to_legacy_common_[request]);