From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joonas Lahtinen Subject: Re: [PATCH 2/5] drm/i915: harden allocation paths in allocate_va_range Date: Mon, 18 Apr 2016 16:13:27 +0300 Message-ID: <1460985207.6027.5.camel@linux.intel.com> References: <1460476663-24890-1-git-send-email-matthew.auld@intel.com> <1460476663-24890-2-git-send-email-matthew.auld@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id A5E726E54F for ; Mon, 18 Apr 2016 13:12:55 +0000 (UTC) In-Reply-To: <1460476663-24890-2-git-send-email-matthew.auld@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Matthew Auld , intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org T24gdGksIDIwMTYtMDQtMTIgYXQgMTY6NTcgKzAxMDAsIE1hdHRoZXcgQXVsZCB3cm90ZToKPiBG b3IgdGhlIGdlbjYvZ2VuOF9hbGxvY2F0ZV92YV9yYW5nZSBmdW5jdGlvbnMgcmVtb3ZlIHRoZSBX QVJOX09OIHJhbmdlCj4gc2FuaXR5IGNoZWNrcyBpbiBmYXZvdXIgb2Ygc2ltcGx5IGhhcmRlbmlu ZyB0aGUgYWxsb2NhdGlvbiBwYXRocy4gVGhpcwo+IGFsc28gZml4ZXMgdGhlIGluY29uc2lzdGVu Y3kgaW4gd2hpY2ggd2UgZG9uJ3QgYWx3YXlzIGhhbmRsZSB0aGUKPiBwb3RlbnRpYWwgb3ZlcmZs b3cgaW4gb3VyIGNoZWNrcy4KPiAKCk5vdCBzdXJlIHRoaXMgaXMgdGhlIHJpZ2h0IHRoaW5nIHRv IGRvLiBJIHRoaW5rIEkgZG8gcHJlZmVyIGVycm9yaW5nCm91dCBvbiBpbnZhbGlkIGFyZ3VtZW50 cyBhcyB3ZSdyZSB0YWxraW5nIG9mIGludGVybmFsIHByb2dyYW1tZXIKaW50ZXJmYWNlLgoKUmVn YXJkcywgSm9vbmFzCgo+IENjOiBDaHJpcyBXaWxzb24gPGNocmlzQGNocmlzLXdpbHNvbi5jby51 az4KPiBDYzogSm9vbmFzIExhaHRpbmVuIDxqb29uYXMubGFodGluZW5AbGludXguaW50ZWwuY29t Pgo+IFNpZ25lZC1vZmYtYnk6IE1hdHRoZXcgQXVsZCA8bWF0dGhldy5hdWxkQGludGVsLmNvbT4K PiAtLS0KPiDCoGRyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZ2VtX2d0dC5jIHwgMTcgKysrKy0t LS0tLS0tLS0tLS0KPiDCoDEgZmlsZSBjaGFuZ2VkLCA0IGluc2VydGlvbnMoKyksIDEzIGRlbGV0 aW9ucygtKQo+IAo+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X2dlbV9n dHQuYyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZ2VtX2d0dC5jCj4gaW5kZXggNWVkNzEz ZC4uZmE1ODNkNSAxMDA2NDQKPiAtLS0gYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X2dlbV9n dHQuYwo+ICsrKyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZ2VtX2d0dC5jCj4gQEAgLTEy MjAsMTUgKzEyMjAsNiBAQCBzdGF0aWMgaW50IGdlbjhfYWxsb2NfdmFfcmFuZ2VfM2x2bChzdHJ1 Y3QgaTkxNV9hZGRyZXNzX3NwYWNlICp2bSwKPiDCoAl1aW50MzJfdCBwZHBlcyA9IEk5MTVfUERQ RVNfUEVSX1BEUChkZXYpOwo+IMKgCWludCByZXQ7Cj4gwqAKPiAtCS8qIFdyYXAgaXMgbmV2ZXIg b2theSBzaW5jZSB3ZSBjYW4gb25seSByZXByZXNlbnQgNDhiLCBhbmQgd2UgZG9uJ3QKPiAtCcKg KiBhY3R1YWxseSB1c2UgdGhlIG90aGVyIHNpZGUgb2YgdGhlIGNhbm9uaWNhbCBhZGRyZXNzIHNw YWNlLgo+IC0JwqAqLwo+IC0JaWYgKFdBUk5fT04oc3RhcnQgKyBsZW5ndGggPCBzdGFydCkpCj4g LQkJcmV0dXJuIC1FTk9ERVY7Cj4gLQo+IC0JaWYgKFdBUk5fT04oc3RhcnQgKyBsZW5ndGggPiB2 bS0+dG90YWwpKQo+IC0JCXJldHVybiAtRU5PREVWOwo+IC0KPiDCoAlyZXQgPSBhbGxvY19nZW44 X3RlbXBfYml0bWFwcygmbmV3X3BhZ2VfZGlycywgJm5ld19wYWdlX3RhYmxlcywgcGRwZXMpOwo+ IMKgCWlmIChyZXQpCj4gwqAJCXJldHVybiByZXQ7Cj4gQEAgLTEzNzAsNiArMTM2MSw4IEBAIHN0 YXRpYyBpbnQgZ2VuOF9hbGxvY192YV9yYW5nZShzdHJ1Y3QgaTkxNV9hZGRyZXNzX3NwYWNlICp2 bSwKPiDCoHsKPiDCoAlzdHJ1Y3QgaTkxNV9od19wcGd0dCAqcHBndHQgPSBpOTE1X3ZtX3RvX3Bw Z3R0KHZtKTsKPiDCoAo+ICsJbGVuZ3RoID0gbWluX3QodWludDY0X3QsIGxlbmd0aCwgdm0tPnRv dGFsKTsKPiArCj4gwqAJaWYgKFVTRVNfRlVMTF80OEJJVF9QUEdUVCh2bS0+ZGV2KSkKPiDCoAkJ cmV0dXJuIGdlbjhfYWxsb2NfdmFfcmFuZ2VfNGx2bCh2bSwgJnBwZ3R0LT5wbWw0LCBzdGFydCwg bGVuZ3RoKTsKPiDCoAllbHNlCj4gQEAgLTE4NjAsMTEgKzE4NTMsOSBAQCBzdGF0aWMgaW50IGdl bjZfYWxsb2NfdmFfcmFuZ2Uoc3RydWN0IGk5MTVfYWRkcmVzc19zcGFjZSAqdm0sCj4gwqAJdWlu dDMyX3QgcGRlLCB0ZW1wOwo+IMKgCWludCByZXQ7Cj4gwqAKPiAtCWlmIChXQVJOX09OKHN0YXJ0 X2luICsgbGVuZ3RoX2luID4gcHBndHQtPmJhc2UudG90YWwpKQo+IC0JCXJldHVybiAtRU5PREVW Owo+IC0KPiDCoAlzdGFydCA9IHN0YXJ0X3NhdmUgPSBzdGFydF9pbjsKPiAtCWxlbmd0aCA9IGxl bmd0aF9zYXZlID0gbGVuZ3RoX2luOwo+ICsJbGVuZ3RoID0gbGVuZ3RoX3NhdmUgPSBsZW5ndGhf aW4gPSBtaW5fdCh1aW50NjRfdCwgbGVuZ3RoX2luLAo+ICsJCQkJCQnCoHBwZ3R0LT5iYXNlLnRv dGFsKTsKPiDCoAo+IMKgCWJpdG1hcF96ZXJvKG5ld19wYWdlX3RhYmxlcywgSTkxNV9QREVTKTsK PiDCoAotLSAKSm9vbmFzIExhaHRpbmVuCk9wZW4gU291cmNlIFRlY2hub2xvZ3kgQ2VudGVyCklu dGVsIENvcnBvcmF0aW9uCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fCkludGVsLWdmeCBtYWlsaW5nIGxpc3QKSW50ZWwtZ2Z4QGxpc3RzLmZyZWVkZXNrdG9w Lm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2ludGVs LWdmeAo=