From: "Dreyfuss, Haim" <haim.dreyfuss@intel.com> To: Colin Ian King <colin.king@canonical.com>, "David S. Miller" <davem@davemloft.net>, Johannes Berg <johannes@sipsolutions.net>, "netdev@vger.kernel.org" <netdev@vger.kernel.org>, "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org> Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org> Subject: RE: [PATCH] cfg80211: read wmm rules from regulatory database Date: Wed, 1 Aug 2018 13:23:06 +0000 [thread overview] Message-ID: <409B2791E285FD41B488E034D9B4719F2D5D22DA@HASMSX106.ger.corp.intel.com> (raw) In-Reply-To: <9ff30f03-07f1-0abd-8c57-2601af546de0@canonical.com> PiAtLS0tLU9yaWdpbmFsIE1lc3NhZ2UtLS0tLQ0KPiBGcm9tOiBDb2xpbiBJYW4gS2luZyBbbWFp bHRvOmNvbGluLmtpbmdAY2Fub25pY2FsLmNvbV0NCj4gU2VudDogVHVlc2RheSwgSnVseSAzMSwg MjAxOCAyOjI4IFBNDQo+IFRvOiBEcmV5ZnVzcywgSGFpbSA8aGFpbS5kcmV5ZnVzc0BpbnRlbC5j b20+OyBEYXZpZCBTLiBNaWxsZXINCj4gPGRhdmVtQGRhdmVtbG9mdC5uZXQ+OyBKb2hhbm5lcyBC ZXJnIDxqb2hhbm5lc0BzaXBzb2x1dGlvbnMubmV0PjsNCj4gbmV0ZGV2QHZnZXIua2VybmVsLm9y ZzsgbGludXgtd2lyZWxlc3NAdmdlci5rZXJuZWwub3JnDQo+IENjOiBsaW51eC1rZXJuZWxAdmdl ci5rZXJuZWwub3JnDQo+IFN1YmplY3Q6IHJlOiBbUEFUQ0hdIGNmZzgwMjExOiByZWFkIHdtbSBy dWxlcyBmcm9tIHJlZ3VsYXRvcnkgZGF0YWJhc2UNCj4gDQo+IEhpIEhhaW0sDQo+IA0KPiBJIHRo aW5rIHRoZXJlIG1heSBiZSBhbiBpc3N1ZSB3aXRoIHRoZSBjb21taXQ6DQo+IA0KPiBGcm9tIDIz MGViYWExODlhZjQ0ZDUwZGNjYjRhMTg0NmUzOWNhNTk0ZTM0N2IgTW9uIFNlcCAxNyAwMDowMDow MA0KPiAyMDAxDQo+IEZyb206IEhhaW0gRHJleWZ1c3MgPGhhaW0uZHJleWZ1c3NAaW50ZWwuY29t Pg0KPiBEYXRlOiBXZWQsIDI4IE1hciAyMDE4IDEzOjI0OjA5ICswMzAwDQo+IFN1YmplY3Q6IFtQ QVRDSF0gY2ZnODAyMTE6IHJlYWQgd21tIHJ1bGVzIGZyb20gcmVndWxhdG9yeSBkYXRhYmFzZQ0K PiANCj4gc3BlY2lmaWNhbGx5IGluIGZ1bmN0aW9uOiByZWdfY29weV9yZWdkKCkNCj4gDQo+ICsg ICAgICAgZm9yIChpID0gMDsgaSA8IHNyY19yZWdkLT5uX3JlZ19ydWxlczsgaSsrKSB7DQo+ICAg ICAgICAgICAgICAgICBtZW1jcHkoJnJlZ2QtPnJlZ19ydWxlc1tpXSwgJnNyY19yZWdkLT5yZWdf cnVsZXNbaV0sDQo+ICAgICAgICAgICAgICAgICAgICAgICAgc2l6ZW9mKHN0cnVjdCBpZWVlODAy MTFfcmVnX3J1bGUpKTsNCj4gKyAgICAgICAgICAgICAgIGlmICghc3JjX3JlZ2QtPnJlZ19ydWxl c1tpXS53bW1fcnVsZSkNCj4gKyAgICAgICAgICAgICAgICAgICAgICAgY29udGludWU7DQo+IA0K PiArICAgICAgICAgICAgICAgcmVnZC0+cmVnX3J1bGVzW2ldLndtbV9ydWxlID0gZF93bW0gKw0K PiArICAgICAgICAgICAgICAgICAgICAgICAoc3JjX3JlZ2QtPnJlZ19ydWxlc1tpXS53bW1fcnVs ZSAtIHNfd21tKSAvDQo+ICsgICAgICAgICAgICAgICAgICAgICAgIHNpemVvZihzdHJ1Y3QgaWVl ZTgwMjExX3dtbV9ydWxlKTsNCj4gKyAgICAgICB9DQo+IA0KPiBUaGUgcG9pbnRlciBhcml0aG1l dGljIChzcmNfcmVnZC0+cmVnX3J1bGVzW2ldLndtbV9ydWxlIC0gc193bW0pIGlzDQo+IHBlcmZv cm1lZCBpbiB0ZXJtcyBvZiB0aGUgc2l6ZSBvZiBzdHJ1Y3QgaWVlZTgwMjExX3dtbV9ydWxlIGFu ZCBub3QgaW4NCj4gYnl0ZXMgYW5kIEkgYmVsaWV2ZSB0aGF0IHRoZSBkaXZpc2lvbiBieSBzaXpl b2Yoc3RydWN0DQo+IGllZWU4MDIxMV93bW1fcnVsZSkgaXMgbm90IHJlcXVpcmVkLg0KPiANCj4g VGhpcyBpc3N1ZSB3YXMgZGV0ZWN0ZWQgYnkgc3RhdGljIGFuYWx5c2lzIHdpdGggQ292ZXJpdHkg U2NhbiwNCj4gQ0lEIzE0Njc0NTEgKCJFeHRyYSBzaXplb2YgZXhwcmVzc2lvbiIpLCAnc3VzcGlj aW91c19kaXZpc2lvbicNCj4gDQo+IEknbSBub3QgMTAwJSBzdXJlIHRoYXQgaXMgdGhpcyBhIGZh bHNlIHBvc2l0aXZlIG9yIG5vdCwgYnV0IEkgdGhpbmsgaXQgbG9va3MNCj4gaW5jb3JyZWN0IHRv IG1lLg0KDQpZZWFoIHlvdSdyZSByaWdodCwgdGhpcyBpcyBub3QgZmFsc2UgcG9zaXRpdmUuDQpK b2hhbm5lcyBhbHJlYWR5IGZpeGVkIHRoYXQgYW5kIEx1Y2Egd2lsbCBwcm9iYWJseSBzZW5kIGl0 IGluIHRoZSBjb21pbmcgd2Vlay4NCj4gDQo=
WARNING: multiple messages have this Message-ID (diff)
From: "Dreyfuss, Haim" <haim.dreyfuss@intel.com> To: Colin Ian King <colin.king@canonical.com>, "David S. Miller" <davem@davemloft.net>, Johannes Berg <johannes@sipsolutions.net>, "netdev@vger.kernel.org" <netdev@vger.kernel.org>, "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org> Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org> Subject: RE: [PATCH] cfg80211: read wmm rules from regulatory database Date: Wed, 1 Aug 2018 13:23:06 +0000 [thread overview] Message-ID: <409B2791E285FD41B488E034D9B4719F2D5D22DA@HASMSX106.ger.corp.intel.com> (raw) In-Reply-To: <9ff30f03-07f1-0abd-8c57-2601af546de0@canonical.com> > -----Original Message----- > From: Colin Ian King [mailto:colin.king@canonical.com] > Sent: Tuesday, July 31, 2018 2:28 PM > To: Dreyfuss, Haim <haim.dreyfuss@intel.com>; David S. Miller > <davem@davemloft.net>; Johannes Berg <johannes@sipsolutions.net>; > netdev@vger.kernel.org; linux-wireless@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Subject: re: [PATCH] cfg80211: read wmm rules from regulatory database > > Hi Haim, > > I think there may be an issue with the commit: > > From 230ebaa189af44d50dccb4a1846e39ca594e347b Mon Sep 17 00:00:00 > 2001 > From: Haim Dreyfuss <haim.dreyfuss@intel.com> > Date: Wed, 28 Mar 2018 13:24:09 +0300 > Subject: [PATCH] cfg80211: read wmm rules from regulatory database > > specifically in function: reg_copy_regd() > > + for (i = 0; i < src_regd->n_reg_rules; i++) { > memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], > sizeof(struct ieee80211_reg_rule)); > + if (!src_regd->reg_rules[i].wmm_rule) > + continue; > > + regd->reg_rules[i].wmm_rule = d_wmm + > + (src_regd->reg_rules[i].wmm_rule - s_wmm) / > + sizeof(struct ieee80211_wmm_rule); > + } > > The pointer arithmetic (src_regd->reg_rules[i].wmm_rule - s_wmm) is > performed in terms of the size of struct ieee80211_wmm_rule and not in > bytes and I believe that the division by sizeof(struct > ieee80211_wmm_rule) is not required. > > This issue was detected by static analysis with Coverity Scan, > CID#1467451 ("Extra sizeof expression"), 'suspicious_division' > > I'm not 100% sure that is this a false positive or not, but I think it looks > incorrect to me. Yeah you're right, this is not false positive. Johannes already fixed that and Luca will probably send it in the coming week. >
next prev parent reply other threads:[~2018-08-01 15:09 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-07-31 11:27 [PATCH] cfg80211: read wmm rules from regulatory database Colin Ian King 2018-07-31 11:27 ` Colin Ian King 2018-08-01 13:23 ` Dreyfuss, Haim [this message] 2018-08-01 13:23 ` Dreyfuss, Haim
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