fs/ntfs3: Check for NULL if ATTR_EA_INFO is incorrect

This can be reason for reported panic
https://lore.kernel.org/ntfs3/f9de5807-2311-7374-afb0-bc5dffb522c0@gmail.com/
Fixes: 4342306f ("fs/ntfs3: Add file operations and implementation")
Reported-by: Mohammad Rasim <mohammad.rasim96@gmail.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

fs/ntfs3/frecord.c

@@ -3080,7 +3080,9 @@ static bool ni_update_parent(struct ntfs_inode *ni, struct NTFS_DUP_INFO *dup,
 			const struct EA_INFO *info;
 
 			info = resident_data_ex(attr, sizeof(struct EA_INFO));
-			dup->ea_size = info->size_pack;
+			/* If ATTR_EA_INFO exists 'info' can't be NULL. */
+			if (info)
+				dup->ea_size = info->size_pack;
 		}
 	}