From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: USB: core: prevent malicious bNumInterfaces overflow From: Greg KH Message-Id: <20171213075107.GA23219@kroah.com> Date: Wed, 13 Dec 2017 08:51:07 +0100 To: Peter Chen Cc: Alan Stern , Andrey Konovalov , USB list List-ID: T24gV2VkLCBEZWMgMTMsIDIwMTcgYXQgMDk6Mjc6NDJBTSArMDgwMCwgUGV0ZXIgQ2hlbiB3cm90 ZToKPiBPbiBUdWUsIERlYyAxMiwgMjAxNyBhdCAwMjoyNToxM1BNIC0wNTAwLCBBbGFuIFN0ZXJu IHdyb3RlOgo+ID4gQSBtYWxpY2lvdXMgVVNCIGRldmljZSB3aXRoIGNyYWZ0ZWQgZGVzY3JpcHRv cnMgY2FuIGNhdXNlIHRoZSBrZXJuZWwKPiA+IHRvIGFjY2VzcyB1bmFsbG9jYXRlZCBtZW1vcnkg Ynkgc2V0dGluZyB0aGUgYk51bUludGVyZmFjZXMgdmFsdWUgdG9vCj4gPiBoaWdoIGluIGEgY29u ZmlndXJhdGlvbiBkZXNjcmlwdG9yLiAgQWx0aG91Z2ggdGhlIHZhbHVlIGlzIGFkanVzdGVkCj4g PiBkdXJpbmcgcGFyc2luZywgdGhpcyBhZGp1c3RtZW50IGlzIHNraXBwZWQgaW4gb25lIG9mIHRo ZSBlcnJvciByZXR1cm4KPiA+IHBhdGhzLgo+ID4gCj4gPiBUaGlzIHBhdGNoIHByZXZlbnRzIHRo ZSBwcm9ibGVtIGJ5IHNldHRpbmcgYk51bUludGVyZmFjZXMgdG8gMAo+ID4gaW5pdGlhbGx5LiAg VGhlIGV4aXN0aW5nIGNvZGUgYWxyZWFkeSBzZXRzIGl0IHRvIHRoZSBwcm9wZXIgdmFsdWUKPiA+ IGFmdGVyIHBhcnNpbmcgaXMgY29tcGxldGUuCj4gPiAKPiA+IFNpZ25lZC1vZmYtYnk6IEFsYW4g U3Rlcm4gPHN0ZXJuQHJvd2xhbmQuaGFydmFyZC5lZHU+Cj4gPiBSZXBvcnRlZC1ieTogQW5kcmV5 IEtvbm92YWxvdiA8YW5kcmV5a252bEBnb29nbGUuY29tPgo+ID4gQ0M6IDxzdGFibGVAdmdlci5r ZXJuZWwub3JnPgo+ID4gCj4gPiAtLS0KPiA+IAo+ID4gCj4gPiBbYXMxODU1XQo+ID4gCj4gPiAK PiA+ICBkcml2ZXJzL3VzYi9jb3JlL2NvbmZpZy5jIHwgICAgNCArKystCj4gPiAgMSBmaWxlIGNo YW5nZWQsIDMgaW5zZXJ0aW9ucygrKSwgMSBkZWxldGlvbigtKQo+ID4gCj4gPiBJbmRleDogdXNi LTQueC9kcml2ZXJzL3VzYi9jb3JlL2NvbmZpZy5jCj4gPiA9PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Cj4gPiAtLS0gdXNi LTQueC5vcmlnL2RyaXZlcnMvdXNiL2NvcmUvY29uZmlnLmMKPiA+ICsrKyB1c2ItNC54L2RyaXZl cnMvdXNiL2NvcmUvY29uZmlnLmMKPiA+IEBAIC01NTUsNiArNTU1LDkgQEAgc3RhdGljIGludCB1 c2JfcGFyc2VfY29uZmlndXJhdGlvbihzdHJ1Ywo+ID4gIAl1bnNpZ25lZCBpYWRfbnVtID0gMDsK PiA+ICAKPiA+ICAJbWVtY3B5KCZjb25maWctPmRlc2MsIGJ1ZmZlciwgVVNCX0RUX0NPTkZJR19T SVpFKTsKPiA+ICsJbmludGYgPSBuaW50Zl9vcmlnID0gY29uZmlnLT5kZXNjLmJOdW1JbnRlcmZh Y2VzOwo+ID4gKwljb25maWctPmRlc2MuYk51bUludGVyZmFjZXMgPSAwOwkvLyBBZGp1c3RlZCBs YXRlcgo+ID4gKwo+IAo+IFRoZSBjb21tZW50IGZvcm1hdD8KCklzIGZpbmUsIEkndmUgZ2l2ZW4g dXAgdGhhdCBmaWdodCA6KQoKZ3JlZyBrLWgKLS0tClRvIHVuc3Vic2NyaWJlIGZyb20gdGhpcyBs aXN0OiBzZW5kIHRoZSBsaW5lICJ1bnN1YnNjcmliZSBsaW51eC11c2IiIGluCnRoZSBib2R5IG9m IGEgbWVzc2FnZSB0byBtYWpvcmRvbW9Admdlci5rZXJuZWwub3JnCk1vcmUgbWFqb3Jkb21vIGlu Zm8gYXQgIGh0dHA6Ly92Z2VyLmtlcm5lbC5vcmcvbWFqb3Jkb21vLWluZm8uaHRtbAo=