cifs: silence compiler warnings showing up with gcc-8.0.0

Web:        https://git.kernel.org/torvalds/c/ade7db991b47ab3016a414468164f4966bd08202
Commit:     ade7db991b47ab3016a414468164f4966bd08202
Parent:     ede2e520a1484924a55c8fc77a8256f5d33d2ab2
Refname:    refs/heads/master
Author:     Arnd Bergmann <[email protected]>
AuthorDate: Fri Feb 2 16:48:47 2018 +0100
Committer:  Steve French <[email protected]>
CommitDate: Wed Feb 7 09:36:41 2018 -0600

    cifs: silence compiler warnings showing up with gcc-8.0.0
    
    This bug was fixed before, but came up again with the latest
    compiler in another function:
    
    fs/cifs/cifssmb.c: In function 'CIFSSMBSetEA':
    fs/cifs/cifssmb.c:6362:3: error: 'strncpy' offset 8 is out of the bounds [0, 4] [-Werror=array-bounds]
       strncpy(parm_data->list[0].name, ea_name, name_len);
    
    Let's apply the same fix that was used for the other instances.
    
    Fixes: b2a3ad9ca502 ("cifs: silence compiler warnings showing up with gcc-4.7.0")
    Signed-off-by: Arnd Bergmann <[email protected]>
    Signed-off-by: Steve French <[email protected]>
---
 fs/cifs/cifssmb.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 4e0922d24eb2..9ceebf30eb22 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -6343,9 +6343,7 @@ SetEARetry:
 	pSMB->InformationLevel =
 		cpu_to_le16(SMB_SET_FILE_EA);
 
-	parm_data =
-		(struct fealist *) (((char *) &pSMB->hdr.Protocol) +
-				       offset);
+	parm_data = (void *)pSMB + offsetof(struct smb_hdr, Protocol) + offset;
 	pSMB->ParameterOffset = cpu_to_le16(param_offset);
 	pSMB->DataOffset = cpu_to_le16(offset);
 	pSMB->SetupCount = 1;
--
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