cifs: add check for returning value of SMB2_set_info_init

BugLink: https://bugs.launchpad.net/bugs/2036450

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: 0967e54 ("cifs: use a compound for setting an xattr")

Signed-off-by: Anastasia Belova <[email protected]>
Signed-off-by: Steve French <[email protected]>
(cherry picked from commit a51e5d2)
Signed-off-by: Tim Gardner <[email protected]>

Author: Anastasia Belova

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]);