[PATCH][SMB3] fix static analysis warning in smb3_simple_fallocate_write_range

[Steve French]

    Clang detected a problem with rc possibly being unitialized
    (when length is zero) in a recently added fallocate code path.

    Reported-by: kernel test robot <lkp@xxxxxxxxx>
    Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 23d6f4d71649..2dfd0d8297eb 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -3617,7 +3617,8 @@ static int
smb3_simple_fallocate_write_range(unsigned int xid,
                                             char *buf)
 {
        struct cifs_io_parms io_parms = {0};
-       int rc, nbytes;
+       int nbytes;
+       int rc = 0;
        struct kvec iov[2];

        io_parms.netfid = cfile->fid.netfid;


-- 
Thanks,

Steve
From 53af3cc8f10f0a0356abd6676028e187ce507689 Mon Sep 17 00:00:00 2001
From: Steve French <stfrench@xxxxxxxxxxxxx>
Date: Mon, 26 Jul 2021 16:22:55 -0500
Subject: [PATCH] smb3: rc uninitialized in one fallocate path

Clang detected a problem with rc possibly being unitialized
(when length is zero) in a recently added fallocate code path.

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
---
 fs/cifs/smb2ops.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 23d6f4d71649..2dfd0d8297eb 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -3617,7 +3617,8 @@ static int smb3_simple_fallocate_write_range(unsigned int xid,
 					     char *buf)
 {
 	struct cifs_io_parms io_parms = {0};
-	int rc, nbytes;
+	int nbytes;
+	int rc = 0;
 	struct kvec iov[2];
 
 	io_parms.netfid = cfile->fid.netfid;
-- 
2.30.2