From: Markus Elfring <elfring@users.sourceforge.net>
Date: Tue, 5 Nov 2019 22:26:53 +0100
Subject: [PATCH] CIFS: Use common error handling code in
 smb2_ioctl_query_info()
Git-commit: 2b1116bbe898aefdf584838448c6869f69851e0f
References: bsc#1144333
Patch-mainline: v5.5-rc1

Move the same error code assignments so that such exception handling
can be better reused at the end of this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Paulo Alcantara <palcantara@suse.de>
---
 fs/cifs/smb2ops.c | 45 +++++++++++++++++++++++----------------------
 1 file changed, 23 insertions(+), 22 deletions(-)

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index e31cdd493e1b..f28d4207bbda 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1524,35 +1524,32 @@ smb2_ioctl_query_info(const unsigned int xid,
 		if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
 			qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
 		if (qi.input_buffer_length > 0 &&
-		    le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length > rsp_iov[1].iov_len) {
-			rc = -EFAULT;
-			goto iqinf_exit;
-		}
-		if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
-				 sizeof(qi.input_buffer_length))) {
-			rc = -EFAULT;
-			goto iqinf_exit;
-		}
+		    le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
+		    > rsp_iov[1].iov_len)
+			goto e_fault;
+
+		if (copy_to_user(&pqi->input_buffer_length,
+				 &qi.input_buffer_length,
+				 sizeof(qi.input_buffer_length)))
+			goto e_fault;
+
 		if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
 				 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
-				 qi.input_buffer_length)) {
-			rc = -EFAULT;
-			goto iqinf_exit;
-		}
+				 qi.input_buffer_length))
+			goto e_fault;
 	} else {
 		pqi = (struct smb_query_info __user *)arg;
 		qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
 		if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
 			qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
-		if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
-				 sizeof(qi.input_buffer_length))) {
-			rc = -EFAULT;
-			goto iqinf_exit;
-		}
-		if (copy_to_user(pqi + 1, qi_rsp->Buffer, qi.input_buffer_length)) {
-			rc = -EFAULT;
-			goto iqinf_exit;
-		}
+		if (copy_to_user(&pqi->input_buffer_length,
+				 &qi.input_buffer_length,
+				 sizeof(qi.input_buffer_length)))
+			goto e_fault;
+
+		if (copy_to_user(pqi + 1, qi_rsp->Buffer,
+				 qi.input_buffer_length))
+			goto e_fault;
 	}
 
  iqinf_exit:
@@ -1568,6 +1565,10 @@ smb2_ioctl_query_info(const unsigned int xid,
 	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 	return rc;
+
+e_fault:
+	rc = -EFAULT;
+	goto iqinf_exit;
 }
 
 static ssize_t
-- 
2.25.1