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Donenfeld" To: linux-kernel@vger.kernel.org, linux-staging@lists.linux.dev, dan.carpenter@oracle.com, gregkh@linuxfoundation.org, kvalo@kernel.org, linux-wireless@vger.kernel.org Cc: "Jason A. Donenfeld" Subject: [PATCH v2] staging: rtl8192e: remove bogus ssid character sign test Date: Tue, 25 Oct 2022 14:21:50 +0200 Message-Id: <20221025122150.583617-1-Jason@zx2c4.com> In-Reply-To: References: MIME-Version: 1.0 X-Spam-Status: No, score=-6.7 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1747662546018741769?= X-GMAIL-MSGID: =?utf-8?q?1747662546018741769?= This error triggers on some architectures with unsigned `char` types: drivers/staging/rtl8192e/rtllib_softmac_wx.c:459 rtllib_wx_set_essid() warn: impossible condition '(extra[i] < 0) => (0-255 < 0)' But actually, the entire test is bogus, as ssids don't have any sign validity rules like that. So just remove this check look all together. Cc: Greg Kroah-Hartman Cc: linux-staging@lists.linux.dev Signed-off-by: Jason A. Donenfeld Reviewed-by: Dan Carpenter --- Changes v1->v2: - Remove ssid sign test entirely rather than casting to `s8 *`. drivers/staging/rtl8192e/rtllib_softmac_wx.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/drivers/staging/rtl8192e/rtllib_softmac_wx.c b/drivers/staging/rtl8192e/rtllib_softmac_wx.c index f9589c5b62ba..1e5ad3b476ef 100644 --- a/drivers/staging/rtl8192e/rtllib_softmac_wx.c +++ b/drivers/staging/rtl8192e/rtllib_softmac_wx.c @@ -439,7 +439,7 @@ int rtllib_wx_set_essid(struct rtllib_device *ieee, union iwreq_data *wrqu, char *extra) { - int ret = 0, len, i; + int ret = 0, len; short proto_started; unsigned long flags; @@ -455,13 +455,6 @@ int rtllib_wx_set_essid(struct rtllib_device *ieee, goto out; } - for (i = 0; i < len; i++) { - if (extra[i] < 0) { - ret = -1; - goto out; - } - } - if (proto_started) rtllib_stop_protocol(ieee, true);