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Tsirkin" To: Jason Wang Subject: Re: [PATCH net-next 1/5] virtio_net: Fix an unsafe reference to the page chain Message-ID: <20230528022737-mutt-send-email-mst@kernel.org> References: <20230526054621.18371-1-liangchen.linux@gmail.com> MIME-Version: 1.0 In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Cc: xuanzhuo@linux.alibaba.com, linux-kernel@vger.kernel.org, alexander.duyck@gmail.com, virtualization@lists.linux-foundation.org, edumazet@google.com, netdev@vger.kernel.org, kuba@kernel.org, pabeni@redhat.com, davem@davemloft.net X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" T24gRnJpLCBNYXkgMjYsIDIwMjMgYXQgMDI6Mzg6NTRQTSArMDgwMCwgSmFzb24gV2FuZyB3cm90 ZToKPiBPbiBGcmksIE1heSAyNiwgMjAyMyBhdCAxOjQ24oCvUE0gTGlhbmcgQ2hlbiA8bGlhbmdj aGVuLmxpbnV4QGdtYWlsLmNvbT4gd3JvdGU6Cj4gPgo+ID4gInByaXZhdGUiIG9mIGJ1ZmZlciBw YWdlIGlzIGN1cnJlbnRseSB1c2VkIGZvciBiaWcgbW9kZSB0byBjaGFpbiBwYWdlcy4KPiA+IEJ1 dCBpbiBtZXJnZWFibGUgbW9kZSwgdGhhdCBvZmZzZXQgb2YgcGFnZSBjb3VsZCBtZWFuIHNvbWV0 aGluZyBlbHNlLAo+ID4gZS5nLiB3aGVuIHBhZ2VfcG9vbCBwYWdlIGlzIHVzZWQgaW5zdGVhZC4g U28gZXhjbHVkaW5nIG1lcmdlYWJsZSBtb2RlIHRvCj4gPiBhdm9pZCBzdWNoIGEgcHJvYmxlbS4K PiAKPiBJZiB0aGlzIGlzc3VlIGhhcHBlbnMgb25seSBpbiB0aGUgY2FzZSBvZiBwYWdlX3Bvb2ws IGl0IHdvdWxkIGJlCj4gYmV0dGVyIHRvIHNxdWFzaCBpdCB0aGVyZS4KPiAKPiBUaGFua3MKCgpU aGlzIGlzIGEgdGlueSBwYXRjaCBzbyBJIGRvbid0IGNhcmUuIEdlbmVyYWxseSBpdCdzIG9rCnRv IGZpcnN0IHJld29yayBjb2RlIHRoZW4gY2hhbmdlIGZ1bmN0aW9uYWxpdHkuCmluIHRoaXMgY2Fz ZSB3aGF0IEphc29uIHNheXMgb3MgcmlnaHQgZXNwZWNpYWxseSBiZWNhdXNlCnlvdSB0aGVuIGRv IG5vdCBuZWVkIHRvIGV4cGxhaW4gdGhhdCBjdXJyZW50IGNvZGUgaXMgb2suCgo+ID4KPiA+IFNp Z25lZC1vZmYtYnk6IExpYW5nIENoZW4gPGxpYW5nY2hlbi5saW51eEBnbWFpbC5jb20+Cj4gPiAt LS0KPiA+ICBkcml2ZXJzL25ldC92aXJ0aW9fbmV0LmMgfCAyICstCj4gPiAgMSBmaWxlIGNoYW5n ZWQsIDEgaW5zZXJ0aW9uKCspLCAxIGRlbGV0aW9uKC0pCj4gPgo+ID4gZGlmZiAtLWdpdCBhL2Ry aXZlcnMvbmV0L3ZpcnRpb19uZXQuYyBiL2RyaXZlcnMvbmV0L3ZpcnRpb19uZXQuYwo+ID4gaW5k ZXggNWE3ZjdhNzZiOTIwLi5jNWRjYTBkOTJlNjQgMTAwNjQ0Cj4gPiAtLS0gYS9kcml2ZXJzL25l dC92aXJ0aW9fbmV0LmMKPiA+ICsrKyBiL2RyaXZlcnMvbmV0L3ZpcnRpb19uZXQuYwo+ID4gQEAg LTQ5Nyw3ICs0OTcsNyBAQCBzdGF0aWMgc3RydWN0IHNrX2J1ZmYgKnBhZ2VfdG9fc2tiKHN0cnVj dCB2aXJ0bmV0X2luZm8gKnZpLAo+ID4gICAgICAgICAgICAgICAgICAgICAgICAgcmV0dXJuIE5V TEw7Cj4gPgo+ID4gICAgICAgICAgICAgICAgIHBhZ2UgPSAoc3RydWN0IHBhZ2UgKilwYWdlLT5w cml2YXRlOwo+ID4gLSAgICAgICAgICAgICAgIGlmIChwYWdlKQo+ID4gKyAgICAgICAgICAgICAg IGlmICghdmktPm1lcmdlYWJsZV9yeF9idWZzICYmIHBhZ2UpCj4gPiAgICAgICAgICAgICAgICAg ICAgICAgICBnaXZlX3BhZ2VzKHJxLCBwYWdlKTsKPiA+ICAgICAgICAgICAgICAgICBnb3RvIG9r Owo+ID4gICAgICAgICB9Cj4gPiAtLQo+ID4gMi4zMS4xCj4gPgoKX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX18KVmlydHVhbGl6YXRpb24gbWFpbGluZyBsaXN0 ClZpcnR1YWxpemF0aW9uQGxpc3RzLmxpbnV4LWZvdW5kYXRpb24ub3JnCmh0dHBzOi8vbGlzdHMu bGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xpc3RpbmZvL3ZpcnR1YWxpemF0aW9u