From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Subject: [PATCH AUTOSEL 4.19 088/167] drm/i915: Sanity check mmap length against object size Date: Tue, 3 Sep 2019 12:24:00 -0400 Message-ID: <20190903162519.7136-88-sashal@kernel.org> References: <20190903162519.7136-1-sashal@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20190903162519.7136-1-sashal@kernel.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Sasha Levin , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org RnJvbTogQ2hyaXMgV2lsc29uIDxjaHJpc0BjaHJpcy13aWxzb24uY28udWs+CgpbIFVwc3RyZWFt IGNvbW1pdCAwMDBjNGY5MGUzZjAxOTRlZWYyMThmZjJjNmE4ZmQ4Y2ExZGU0MzEzIF0KCldlIGFz c3VtZWQgdGhhdCB2bV9tbWFwKCkgd291bGQgcmVqZWN0IGFuIGF0dGVtcHQgdG8gbW1hcCBwYXN0 IHRoZSBlbmQgb2YKdGhlIGZpbHAgKG91ciBvYmplY3QpLCBidXQgd2Ugd2VyZSB3cm9uZy4KCkFw cGxpY2F0aW9ucyB0aGF0IHRyaWVkIHRvIHVzZSB0aGUgbW1hcCBiZXlvbmQgdGhlIGVuZCBvZiB0 aGUgb2JqZWN0CndvdWxkIGJlIGdyZWV0ZWQgYnkgYSBTSUdCVVMuIEFmdGVyIHRoaXMgcGF0Y2gs IHRob3NlIGFwcGxpY2F0aW9ucyB3aWxsCmJlIHRvbGQgYWJvdXQgdGhlIGVycm9yIG9uIGNyZWF0 aW5nIHRoZSBtbWFwLCByYXRoZXIgdGhhbiBhdCBhIHJhbmRvbQptb21lbnQgb24gbGF0ZXIgYWNj ZXNzLgoKUmVwb3J0ZWQtYnk6IEFudG9uaW8gQXJnZW56aWFubyA8YW50b25pby5hcmdlbnppYW5v QGludGVsLmNvbT4KVGVzdGNhc2U6IGlndC9nZW1fbW1hcC9iYWQtc2l6ZQpTaWduZWQtb2ZmLWJ5 OiBDaHJpcyBXaWxzb24gPGNocmlzQGNocmlzLXdpbHNvbi5jby51az4KQ2M6IEFudG9uaW8gQXJn ZW56aWFubyA8YW50b25pby5hcmdlbnppYW5vQGludGVsLmNvbT4KQ2M6IEpvb25hcyBMYWh0aW5l biA8am9vbmFzLmxhaHRpbmVuQGxpbnV4LmludGVsLmNvbT4KQ2M6IFR2cnRrbyBVcnN1bGluIDx0 dnJ0a28udXJzdWxpbkBpbnRlbC5jb20+CkNjOiBzdGFibGVAdmdlci5rZXJuZWwub3JnClJldmll d2VkLWJ5OiBUdnJ0a28gVXJzdWxpbiA8dHZydGtvLnVyc3VsaW5AaW50ZWwuY29tPgpSZXZpZXdl ZC1ieTogSm9vbmFzIExhaHRpbmVuIDxqb29uYXMubGFodGluZW5AbGludXguaW50ZWwuY29tPgpM aW5rOiBodHRwczovL3BhdGNod29yay5mcmVlZGVza3RvcC5vcmcvcGF0Y2gvbXNnaWQvMjAxOTAz MTQwNzU4MjkuMTY4MzgtMS1jaHJpc0BjaHJpcy13aWxzb24uY28udWsKKGNoZXJyeSBwaWNrZWQg ZnJvbSBjb21taXQgNzk0YTExY2I2NzIwMWFkMWJiNjFhZjUxMGJiODQ2MDI4MGZlYjNmMykKU2ln bmVkLW9mZi1ieTogUm9kcmlnbyBWaXZpIDxyb2RyaWdvLnZpdmlAaW50ZWwuY29tPgpTaWduZWQt b2ZmLWJ5OiBTYXNoYSBMZXZpbiA8c2FzaGFsQGtlcm5lbC5vcmc+Ci0tLQogZHJpdmVycy9ncHUv ZHJtL2k5MTUvaTkxNV9nZW0uYyB8IDE1ICsrKysrKysrKy0tLS0tLQogMSBmaWxlIGNoYW5nZWQs IDkgaW5zZXJ0aW9ucygrKSwgNiBkZWxldGlvbnMoLSkKCmRpZmYgLS1naXQgYS9kcml2ZXJzL2dw dS9kcm0vaTkxNS9pOTE1X2dlbS5jIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9nZW0uYwpp bmRleCA5NjM0ZDNhZGI4ZDAxLi45MzcyODc3MTAwNDIwIDEwMDY0NAotLS0gYS9kcml2ZXJzL2dw dS9kcm0vaTkxNS9pOTE1X2dlbS5jCisrKyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZ2Vt LmMKQEAgLTE4NzQsOCArMTg3NCwxMyBAQCBpOTE1X2dlbV9tbWFwX2lvY3RsKHN0cnVjdCBkcm1f ZGV2aWNlICpkZXYsIHZvaWQgKmRhdGEsCiAJICogcGFnZXMgZnJvbS4KIAkgKi8KIAlpZiAoIW9i ai0+YmFzZS5maWxwKSB7Ci0JCWk5MTVfZ2VtX29iamVjdF9wdXQob2JqKTsKLQkJcmV0dXJuIC1F TlhJTzsKKwkJYWRkciA9IC1FTlhJTzsKKwkJZ290byBlcnI7CisJfQorCisJaWYgKHJhbmdlX292 ZXJmbG93cyhhcmdzLT5vZmZzZXQsIGFyZ3MtPnNpemUsICh1NjQpb2JqLT5iYXNlLnNpemUpKSB7 CisJCWFkZHIgPSAtRUlOVkFMOworCQlnb3RvIGVycjsKIAl9CiAKIAlhZGRyID0gdm1fbW1hcChv YmotPmJhc2UuZmlscCwgMCwgYXJncy0+c2l6ZSwKQEAgLTE4ODksOCArMTg5NCw4IEBAIGk5MTVf Z2VtX21tYXBfaW9jdGwoc3RydWN0IGRybV9kZXZpY2UgKmRldiwgdm9pZCAqZGF0YSwKIAkJc3Ry dWN0IHZtX2FyZWFfc3RydWN0ICp2bWE7CiAKIAkJaWYgKGRvd25fd3JpdGVfa2lsbGFibGUoJm1t LT5tbWFwX3NlbSkpIHsKLQkJCWk5MTVfZ2VtX29iamVjdF9wdXQob2JqKTsKLQkJCXJldHVybiAt RUlOVFI7CisJCQlhZGRyID0gLUVJTlRSOworCQkJZ290byBlcnI7CiAJCX0KIAkJdm1hID0gZmlu ZF92bWEobW0sIGFkZHIpOwogCQlpZiAodm1hICYmIF9fdm1hX21hdGNoZXModm1hLCBvYmotPmJh c2UuZmlscCwgYWRkciwgYXJncy0+c2l6ZSkpCkBAIC0xOTA4LDEyICsxOTEzLDEwIEBAIGk5MTVf Z2VtX21tYXBfaW9jdGwoc3RydWN0IGRybV9kZXZpY2UgKmRldiwgdm9pZCAqZGF0YSwKIAlpOTE1 X2dlbV9vYmplY3RfcHV0KG9iaik7CiAKIAlhcmdzLT5hZGRyX3B0ciA9ICh1aW50NjRfdCkgYWRk cjsKLQogCXJldHVybiAwOwogCiBlcnI6CiAJaTkxNV9nZW1fb2JqZWN0X3B1dChvYmopOwotCiAJ cmV0dXJuIGFkZHI7CiB9CiAKLS0gCjIuMjAuMQoKX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlz dHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4v bGlzdGluZm8vaW50ZWwtZ2Z4