From: Long Li <longli@microsoft.com>
Date: Wed, 16 Oct 2019 20:51:52 +0000 (-0700)
Subject: cifs: smbd: Return -EINVAL when the number of iovs exceeds SMBDIRECT_MAX_SGE
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=37941ea17d3f8eb2f5ac2f59346fab9e8439271a;p=linux.git

cifs: smbd: Return -EINVAL when the number of iovs exceeds SMBDIRECT_MAX_SGE

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@microsoft.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
---

diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
index 3c91fa97c9a85..64c5b872220d1 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);