IB/hfi1: Restore allocated resources on failed copyout

[ Upstream commit 6601fc0d15 ]

Fix a resource leak if an error occurs.

Fixes: f404ca4c7e ("IB/hfi1: Refactor hfi_user_exp_rcv_setup() IOCTL")
Signed-off-by: Dean Luick <dean.luick@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Link: https://lore.kernel.org/r/167354736291.2132367.10894218740150168180.stgit@awfm-02.cornelisnetworks.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/infiniband/hw/hfi1/file_ops.c

@@ -1318,12 +1318,15 @@ static int user_exp_rcv_setup(struct hfi1_filedata *fd, unsigned long arg,
 		addr = arg + offsetof(struct hfi1_tid_info, tidcnt);
 		if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
 				 sizeof(tinfo.tidcnt)))
-			return -EFAULT;
+			ret = -EFAULT;
 
 		addr = arg + offsetof(struct hfi1_tid_info, length);
-		if (copy_to_user((void __user *)addr, &tinfo.length,
+		if (!ret && copy_to_user((void __user *)addr, &tinfo.length,
 				 sizeof(tinfo.length)))
 			ret = -EFAULT;
+
+		if (ret)
+			hfi1_user_exp_rcv_invalid(fd, &tinfo);
 	}
 
 	return ret;