From mboxrd@z Thu Jan 1 00:00:00 1970 From: Evan Quan Subject: [PATCH] drm/amd/powerplay: avoid possible buffer overflow Date: Tue, 8 Jan 2019 10:36:18 +0800 Message-ID: <20190108023618.18298-1-evan.quan@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Sender: "amd-gfx" To: amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Cc: Evan Quan TWFrZSBzdXJlIHRoZSBjbG9jayBsZXZlbCBlbmZvcmNlZCBpcyB3aXRoaW4gdGhlIGFsbG93ZWQK cmFuZ2VzLgoKQ2hhbmdlLUlkOiBJZjY5YTg1MTIxMjFjMGM5NDgxOGFiNjk4NTk1NTAyZTE3NTY5 ZDRjNwpTaWduZWQtb2ZmLWJ5OiBFdmFuIFF1YW4gPGV2YW4ucXVhbkBhbWQuY29tPgotLS0KIGRy aXZlcnMvZ3B1L2RybS9hbWQvcG93ZXJwbGF5L2h3bWdyL3ZlZ2EyMF9od21nci5jIHwgMTQgKysr KysrKysrKysrKysKIDEgZmlsZSBjaGFuZ2VkLCAxNCBpbnNlcnRpb25zKCspCgpkaWZmIC0tZ2l0 IGEvZHJpdmVycy9ncHUvZHJtL2FtZC9wb3dlcnBsYXkvaHdtZ3IvdmVnYTIwX2h3bWdyLmMgYi9k cml2ZXJzL2dwdS9kcm0vYW1kL3Bvd2VycGxheS9od21nci92ZWdhMjBfaHdtZ3IuYwppbmRleCA4 ZjYwOTdjNmEwMmIuLmMyMDYxZDM1MWQwNCAxMDA2NDQKLS0tIGEvZHJpdmVycy9ncHUvZHJtL2Ft ZC9wb3dlcnBsYXkvaHdtZ3IvdmVnYTIwX2h3bWdyLmMKKysrIGIvZHJpdmVycy9ncHUvZHJtL2Ft ZC9wb3dlcnBsYXkvaHdtZ3IvdmVnYTIwX2h3bWdyLmMKQEAgLTIyNTEsNiArMjI1MSwxMyBAQCBz dGF0aWMgaW50IHZlZ2EyMF9mb3JjZV9jbG9ja19sZXZlbChzdHJ1Y3QgcHBfaHdtZ3IgKmh3bWdy LAogCQlzb2Z0X21pbl9sZXZlbCA9IG1hc2sgPyAoZmZzKG1hc2spIC0gMSkgOiAwOwogCQlzb2Z0 X21heF9sZXZlbCA9IG1hc2sgPyAoZmxzKG1hc2spIC0gMSkgOiAwOwogCisJCWlmIChzb2Z0X21h eF9sZXZlbCA+PSBkYXRhLT5kcG1fdGFibGUuZ2Z4X3RhYmxlLmNvdW50KSB7CisJCQlwcl9lcnIo IkNsb2NrIGxldmVsIHNwZWNpZmllZCAlZCBpcyBvdmVyIG1heCBhbGxvd2VkICVkXG4iLAorCQkJ CQlzb2Z0X21heF9sZXZlbCwKKwkJCQkJZGF0YS0+ZHBtX3RhYmxlLmdmeF90YWJsZS5jb3VudCAt IDEpOworCQkJcmV0dXJuIC1FSU5WQUw7CisJCX0KKwogCQlkYXRhLT5kcG1fdGFibGUuZ2Z4X3Rh YmxlLmRwbV9zdGF0ZS5zb2Z0X21pbl9sZXZlbCA9CiAJCQlkYXRhLT5kcG1fdGFibGUuZ2Z4X3Rh YmxlLmRwbV9sZXZlbHNbc29mdF9taW5fbGV2ZWxdLnZhbHVlOwogCQlkYXRhLT5kcG1fdGFibGUu Z2Z4X3RhYmxlLmRwbV9zdGF0ZS5zb2Z0X21heF9sZXZlbCA9CkBAIC0yMjcxLDYgKzIyNzgsMTMg QEAgc3RhdGljIGludCB2ZWdhMjBfZm9yY2VfY2xvY2tfbGV2ZWwoc3RydWN0IHBwX2h3bWdyICpo d21nciwKIAkJc29mdF9taW5fbGV2ZWwgPSBtYXNrID8gKGZmcyhtYXNrKSAtIDEpIDogMDsKIAkJ c29mdF9tYXhfbGV2ZWwgPSBtYXNrID8gKGZscyhtYXNrKSAtIDEpIDogMDsKIAorCQlpZiAoc29m dF9tYXhfbGV2ZWwgPj0gZGF0YS0+ZHBtX3RhYmxlLm1lbV90YWJsZS5jb3VudCkgeworCQkJcHJf ZXJyKCJDbG9jayBsZXZlbCBzcGVjaWZpZWQgJWQgaXMgb3ZlciBtYXggYWxsb3dlZCAlZFxuIiwK KwkJCQkJc29mdF9tYXhfbGV2ZWwsCisJCQkJCWRhdGEtPmRwbV90YWJsZS5tZW1fdGFibGUuY291 bnQgLSAxKTsKKwkJCXJldHVybiAtRUlOVkFMOworCQl9CisKIAkJZGF0YS0+ZHBtX3RhYmxlLm1l bV90YWJsZS5kcG1fc3RhdGUuc29mdF9taW5fbGV2ZWwgPQogCQkJZGF0YS0+ZHBtX3RhYmxlLm1l bV90YWJsZS5kcG1fbGV2ZWxzW3NvZnRfbWluX2xldmVsXS52YWx1ZTsKIAkJZGF0YS0+ZHBtX3Rh YmxlLm1lbV90YWJsZS5kcG1fc3RhdGUuc29mdF9tYXhfbGV2ZWwgPQotLSAKMi4yMC4xCgpfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwphbWQtZ2Z4IG1haWxp bmcgbGlzdAphbWQtZ2Z4QGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZyZWVk ZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2FtZC1nZngK