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: gadget: Don't allocate zero-length buffers From: Greg KH Message-Id: <20190320142503.GB26251@kroah.com> Date: Wed, 20 Mar 2019 15:25:03 +0100 To: Andrzej Pietrasiewicz Cc: linux-usb@vger.kernel.org, Felipe Balbi , Michal Nazarewicz , kernel@collabora.com, Marek Szyprowski , Bartlomiej Zolnierkiewicz List-ID: T24gV2VkLCBNYXIgMjAsIDIwMTkgYXQgMDE6NTY6NDFQTSArMDEwMCwgQW5kcnplaiBQaWV0cmFz aWV3aWN6IHdyb3RlOgo+IERvbid0IGFjdHVhbGx5IGFsbG9jYXRlIGFueXRoaW5nIGlmIHVzZXJz cGFjZSBlbnF1ZXVlcyBhIHplcm8tbGVuZ3RoCj4gYnVmZmVyLiBPdGhlcndpc2Ugdm1hbGxvYyBv ZiB6ZXJvLXNpemVkIGFyZWEgd2lsbCBiZSBhdHRlbXB0ZWQgaW4KPiBmZnNfYnVpbGRfc2dfbGlz dCgpLgo+IAo+IFNpZ25lZC1vZmYtYnk6IEFuZHJ6ZWogUGlldHJhc2lld2ljeiA8YW5kcnplai5w QGNvbGxhYm9yYS5jb20+Cj4gLS0tCj4gIGRyaXZlcnMvdXNiL2dhZGdldC9mdW5jdGlvbi9mX2Zz LmMgfCA1ICsrKystCj4gIDEgZmlsZSBjaGFuZ2VkLCA0IGluc2VydGlvbnMoKyksIDEgZGVsZXRp b24oLSkKPiAKPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy91c2IvZ2FkZ2V0L2Z1bmN0aW9uL2ZfZnMu YyBiL2RyaXZlcnMvdXNiL2dhZGdldC9mdW5jdGlvbi9mX2ZzLmMKPiBpbmRleCAwODM1N2M1ZGQw MjYuLjVjZWNmZTNlOTM5NSAxMDA2NDQKPiAtLS0gYS9kcml2ZXJzL3VzYi9nYWRnZXQvZnVuY3Rp b24vZl9mcy5jCj4gKysrIGIvZHJpdmVycy91c2IvZ2FkZ2V0L2Z1bmN0aW9uL2ZfZnMuYwo+IEBA IC03OTcsNiArNzk3LDkgQEAgc3RhdGljIHZvaWQgKmZmc19idWlsZF9zZ19saXN0KHN0cnVjdCBz Z190YWJsZSAqc2d0LCBzaXplX3Qgc3opCj4gIHN0YXRpYyBpbmxpbmUgdm9pZCAqZmZzX2FsbG9j X2J1ZmZlcihzdHJ1Y3QgZmZzX2lvX2RhdGEgKmlvX2RhdGEsCj4gIAlzaXplX3QgZGF0YV9sZW4p Cj4gIHsKPiArCWlmICghZGF0YV9sZW4pCj4gKwkJcmV0dXJuIFpFUk9fU0laRV9QVFI7Cj4gKwo+ ICAJaWYgKGlvX2RhdGEtPnVzZV9zZykKPiAgCQlyZXR1cm4gZmZzX2J1aWxkX3NnX2xpc3QoJmlv X2RhdGEtPnNndCwgZGF0YV9sZW4pOwo+ICAKPiBAQCAtODA1LDcgKzgwOCw3IEBAIHN0YXRpYyBp bmxpbmUgdm9pZCAqZmZzX2FsbG9jX2J1ZmZlcihzdHJ1Y3QgZmZzX2lvX2RhdGEgKmlvX2RhdGEs Cj4gIAo+ICBzdGF0aWMgaW5saW5lIHZvaWQgZmZzX2ZyZWVfYnVmZmVyKHN0cnVjdCBmZnNfaW9f ZGF0YSAqaW9fZGF0YSkKPiAgewo+IC0JaWYgKCFpb19kYXRhLT5idWYpCj4gKwlpZiAoWkVST19P Ul9OVUxMX1BUUihpb19kYXRhLT5idWYpKQo+ICAJCXJldHVybjsKPiAgCj4gIAlpZiAoaW9fZGF0 YS0+dXNlX3NnKSB7CgpBcmUgeW91IHN1cmUgdGhpcyBpcyBvaz8gIHplcm8gbGVuZ3RoIHBhY2tl dHMgbWVhbiBzb21ldGhpbmcgaW4gdGhlIFVTQgpwcm90b2NvbCA6KQoKV2hhdCBpcyB0aGUgcHJv YmxlbSBvZiB0cnlpbmcgdG8gYWxsb2NhdGUgYSBidWZmZXIgb2YgMCBieXRlcz8KCnRoYW5rcywK CmdyZWcgay1oCg==