linux-kernel - [PATCH 3/7] cifs: smbd: Return -EINVAL when the number of iovs exceeds SMBDIRECT_MAX

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Date:   Wed, 16 Oct 2019 13:51:52 -0700
From:   longli@...uxonhyperv.com
To:     Steve French <sfrench@...ba.org>, linux-cifs@...r.kernel.org,
        samba-technical@...ts.samba.org, linux-kernel@...r.kernel.org
Cc:     Long Li <longli@...rosoft.com>, stable@...r.kernel.org
Subject: [PATCH 3/7] cifs: smbd: Return -EINVAL when the number of iovs exceeds SMBDIRECT_MAX_SGE

From: Long Li <longli@...rosoft.com>

While it's not friendly to fail user processes that issue more iovs
than we support, at least we should return the correct error code so the
user process gets a chance to retry with smaller number of iovs.

Signed-off-by: Long Li <longli@...rosoft.com>
Cc: stable@...r.kernel.org
---
 fs/cifs/smbdirect.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
index cd07e5301d42..d41a9345f90d 100644
--- a/fs/cifs/smbdirect.c
+++ b/fs/cifs/smbdirect.c
@@ -1069,7 +1069,7 @@ static int smbd_post_send_data(
 
 	if (n_vec > SMBDIRECT_MAX_SGE) {
 		cifs_dbg(VFS, "Can't fit data to SGL, n_vec=%d\n", n_vec);
-		return -ENOMEM;
+		return -EINVAL;
 	}
 
 	sg_init_table(sgl, n_vec);
-- 
2.17.1