linux-kernel - [PATCH] cifs: add check for returning value of SMB2_set_info

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Date:   Wed, 16 Nov 2022 17:10:27 +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>, 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_set_info_init

If the returning value of SMB2_set_info_init is an error-value,
exit the function.

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

Fixes: 0967e5457954 ("cifs: use a compound for setting an xattr")

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..c77e49b3fcc6 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1116,6 +1116,8 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 				COMPOUND_FID, current->tgid,
 				FILE_FULL_EA_INFORMATION,
 				SMB2_O_INFO_FILE, 0, data, size);
+	if (rc)
+		goto sea_exit;
 	smb2_set_next_command(tcon, &rqst[1]);
 	smb2_set_related(&rqst[1]);
 
-- 
2.30.2