From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sean Paul Subject: Re: [PATCH v3 06/24] drm/rockchip: dw-mipi-dsi: avoid out-of-bounds read on tx_buf Date: Tue, 31 Jan 2017 09:48:18 -0500 Message-ID: <20170131144818.GX20076@art_vandelay> References: <20170129132444.25251-1-john@metanate.com> <20170129132444.25251-7-john@metanate.com> <20170130180146.GG20076@art_vandelay> <20170130181636.1bc81e86.john@metanate.com> <20170130200955.GL20076@art_vandelay> <20170131114548.667d3911.john@metanate.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: <20170131114548.667d3911.john@metanate.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: John Keeping Cc: Chris Zhong , linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org List-Id: linux-rockchip.vger.kernel.org T24gVHVlLCBKYW4gMzEsIDIwMTcgYXQgMTE6NDU6NDhBTSArMDAwMCwgSm9obiBLZWVwaW5nIHdy b3RlOgo+IE9uIE1vbiwgMzAgSmFuIDIwMTcgMTU6MDk6NTUgLTA1MDAsIFNlYW4gUGF1bCB3cm90 ZToKPiAKPiA+IE9uIE1vbiwgSmFuIDMwLCAyMDE3IGF0IDA2OjE2OjM2UE0gKzAwMDAsIEpvaG4g S2VlcGluZyB3cm90ZToKPiA+ID4gT24gTW9uLCAzMCBKYW4gMjAxNyAxMzowMTo0NiAtMDUwMCwg U2VhbiBQYXVsIHdyb3RlOgo+ID4gPiAgIAo+ID4gPiA+IE9uIFN1biwgSmFuIDI5LCAyMDE3IGF0 IDAxOjI0OjI2UE0gKzAwMDAsIEpvaG4gS2VlcGluZyB3cm90ZTogIAo+ID4gPiA+ID4gQXMgYSBz aWRlLWVmZmVjdCBvZiB0aGlzLCBlbmNvZGUgdGhlIGVuZGlhbm5lc3MgZXhwbGljaXRseSByYXRo ZXIgdGhhbgo+ID4gPiA+ID4gY2FzdGluZyBhIHUxNi4KPiA+ID4gPiA+IAo+ID4gPiA+ID4gU2ln bmVkLW9mZi1ieTogSm9obiBLZWVwaW5nIDxqb2huQG1ldGFuYXRlLmNvbT4KPiA+ID4gPiA+IFJl dmlld2VkLWJ5OiBDaHJpcyBaaG9uZyA8enl3QHJvY2stY2hpcHMuY29tPgo+ID4gPiA+ID4gLS0t Cj4gPiA+ID4gPiB2MzoKPiA+ID4gPiA+IC0gQWRkIENocmlzJyBSZXZpZXdlZC1ieQo+ID4gPiA+ ID4gVW5jaGFuZ2VkIGluIHYyCj4gPiA+ID4gPiAKPiA+ID4gPiA+ICBkcml2ZXJzL2dwdS9kcm0v cm9ja2NoaXAvZHctbWlwaS1kc2kuYyB8IDkgKysrKysrKy0tCj4gPiA+ID4gPiAgMSBmaWxlIGNo YW5nZWQsIDcgaW5zZXJ0aW9ucygrKSwgMiBkZWxldGlvbnMoLSkKPiA+ID4gPiA+IAo+ID4gPiA+ ID4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvZ3B1L2RybS9yb2NrY2hpcC9kdy1taXBpLWRzaS5jIGIv ZHJpdmVycy9ncHUvZHJtL3JvY2tjaGlwL2R3LW1pcGktZHNpLmMKPiA+ID4gPiA+IGluZGV4IDRi ZTFmZjNhNDJiYi4uMmU2YWQ0NTkxZWJmIDEwMDY0NAo+ID4gPiA+ID4gLS0tIGEvZHJpdmVycy9n cHUvZHJtL3JvY2tjaGlwL2R3LW1pcGktZHNpLmMKPiA+ID4gPiA+ICsrKyBiL2RyaXZlcnMvZ3B1 L2RybS9yb2NrY2hpcC9kdy1taXBpLWRzaS5jCj4gPiA+ID4gPiBAQCAtNTcyLDggKzU3MiwxMyBA QCBzdGF0aWMgaW50IGR3X21pcGlfZHNpX2dlbl9wa3RfaGRyX3dyaXRlKHN0cnVjdCBkd19taXBp X2RzaSAqZHNpLCB1MzIgaGRyX3ZhbCkKPiA+ID4gPiA+ICBzdGF0aWMgaW50IGR3X21pcGlfZHNp X2Rjc19zaG9ydF93cml0ZShzdHJ1Y3QgZHdfbWlwaV9kc2kgKmRzaSwKPiA+ID4gPiA+ICAJCQkJ ICAgICAgIGNvbnN0IHN0cnVjdCBtaXBpX2RzaV9tc2cgKm1zZykKPiA+ID4gPiA+ICB7Cj4gPiA+ ID4gPiAtCWNvbnN0IHUxNiAqdHhfYnVmID0gbXNnLT50eF9idWY7Cj4gPiA+ID4gPiAtCXUzMiB2 YWwgPSBHRU5fSERBVEEoKnR4X2J1ZikgfCBHRU5fSFRZUEUobXNnLT50eXBlKTsKPiA+ID4gPiA+ ICsJY29uc3QgdTggKnR4X2J1ZiA9IG1zZy0+dHhfYnVmOwo+ID4gPiA+ID4gKwl1MzIgdmFsID0g R0VOX0hUWVBFKG1zZy0+dHlwZSk7Cj4gPiA+ID4gPiArCj4gPiA+ID4gPiArCWlmIChtc2ctPnR4 X2xlbiA+IDApCj4gPiA+ID4gPiArCQl2YWwgfD0gR0VOX0hEQVRBKHR4X2J1ZlswXSk7Cj4gPiA+ ID4gPiArCWlmIChtc2ctPnR4X2xlbiA+IDEpCj4gPiA+ID4gPiArCQl2YWwgfD0gR0VOX0hEQVRB KHR4X2J1ZlsxXSA8PCA4KTsgICAgCj4gPiA+ID4gCj4gPiA+ID4gWW91IHNob3VsZCBwcm9iYWJs eSB1cGRhdGUgdGhlIG1hc2sgaW5zaWRlIEdFTl9IREFUQSB0byBtYXNrIG9mZiA4IGJpdHMgaW5z dGVhZCBvZgo+ID4gPiA+IDE2LiAgCj4gPiA+IAo+ID4gPiBXb24ndCB0aGF0IG1hc2sgb2ZmIHRo ZSBkYXRhIHdyaXR0ZW4gYnkgInR4X2J1ZlsxXSA8PCA4Ij8gIAo+ID4gCj4gPiBJIHdvdWxkIG1v dmUgdGhlIHNoaWZ0IG91dHNpZGUgdGhlIG1hc2ssIGllOgo+ID4gCj4gPiB2YWwgfD0gR0VOX0hE QVRBKHR4X2J1ZlsxXSkgPDwgODsKPiAKPiBJIGNhbiBkbyB0aGF0LCBidXQgdGhhdCBkb2Vzbid0 IHNlZW0gdG8gbWF0Y2ggdGhlIGludGVudGlvbiBvZiB0aGUKPiBtYWNyb3Mgd2hpY2ggYXJlIGFi b3V0IGVuY29kaW5nIHRoZSBwbGFjZW1lbnQgYW5kIHNpemUgb2YgZmllbGRzIHdpdGhpbgo+IHJl Z2lzdGVycy4KPiAKPiBNYXliZSBpdCB3b3VsZCBiZSBjbGVhcmVyIHRvIGRvOgo+IAo+ICAgICB1 MTYgZGF0YSA9IDA7Cj4gCj4gICAgIGlmIChtc2ctPnR4X2xlbiA+IDApCj4gICAgICAgICBkYXRh IHw9IHR4X2J1ZlswXTsKPiAgICAgaWYgKG1zZy0+dHhfbGVuID4gMSkKPiAgICAgICAgIGRhdGEg fD0gdHhfYnVmWzFdOwoKWWVwLCB0aGlzIGxvb2tzIGdvb2QgdG8gbWUsIGJ1dCBJIHRoaW5rIHlv dSBuZWVkOgoKZGF0YSB8PSB0eF9idWZbMV0gPDwgODsKClNlYW4KCj4gCj4gICAgIHZhbCA9IEdF Tl9IREFUQShkYXRhKSB8IEdFTl9IVFlQRShtc2ctPnR5cGUpOwo+IAo+ID8KPiBfX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwo+IGRyaS1kZXZlbCBtYWlsaW5n IGxpc3QKPiBkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCj4gaHR0cHM6Ly9saXN0cy5m cmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwKCi0tIApTZWFuIFBhdWws IFNvZnR3YXJlIEVuZ2luZWVyLCBHb29nbGUgLyBDaHJvbWl1bSBPUwpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpkcmktZGV2ZWwgbWFpbGluZyBsaXN0CmRy aS1kZXZlbEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5v cmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwK