linux-kernel - [PATCH] cifs: add check for returning value of SMB2_close

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Message-Id: <20221115142701.27074-1-abelova@astralinux.ru>
Date:   Tue, 15 Nov 2022 17:27:01 +0300
From:   Anastasia Belova <abelova@...ralinux.ru>
To:     Steve French <sfrench@...ba.org>
Cc:     Anastasia Belova <abelova@...ralinux.ru>,
        Paulo Alcantara <pc@....nz>,
        Ronnie Sahlberg <lsahlber@...hat.com>,
        Shyam Prasad N <sprasad@...rosoft.com>,
        Tom Talpey <tom@...pey.com>, Aurelien Aptel <aaptel@...e.com>,
        linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org,
        linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: [PATCH] cifs: add check for returning value of SMB2_close_init

If the returning value of SMB2_close_init is an error-value, 
exit the function.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 352d96f3acc6 ("cifs: multichannel: move channel selection above transport layer")

Signed-off-by: Anastasia Belova <abelova@...ralinux.ru>
---
 fs/cifs/smb2ops.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 880cd494afea..9737296c0fbc 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1126,6 +1126,8 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 	rqst[2].rq_nvec = 1;
 	rc = SMB2_close_init(tcon, server,
 			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
+	if (rc)
+		goto sea_exit;
 	smb2_set_related(&rqst[2]);
 
 	rc = compound_send_recv(xid, ses, server,
-- 
2.30.2