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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=DSUCsXvUq5CC+YLJR6sM+UncKVzG/eChv6GRiJ5ewuo=; b=I/ALFOAS7+/RgAipthJRUitvDvc7a2zQth4K0WyPLSjXYpXU4Yf/KybbfQZApZEdF1 aicEI9JwoG/mYEoN+ydg0yqqq8UQkoHJ2hG6zGljInPU4rDh2oijPLG2lrqZP+zNzSTm kqCzLpWSY0Bl7ZvNazLCvDAMgMEXZ5LzgX8LF8RtjlxD/XAYq49XLae9CGJZqFVeI62e 4mwRqneCNunOPkRTypU09kBcT908nmnQCOtGSg7fPwaMyK63K7NyC5revDw3I0wjE4Vn Hxv7sGFXfwMouC+cjLZ9SQ7qScDoeMP/R7CQl95GO4H/ADPIdBk9j1xeNQKp0RbGwNVa pGIQ== X-Gm-Message-State: AOAM531rA0JFJgHYmTLOxKAbJkbvCnN9IUdgcvbBbO8HvZ7mnG4zUEiH KXnJxLaMOJpBvW5UbYXrtVf6y+zjCunEJsx1BXzYvg== X-Google-Smtp-Source: ABdhPJySDowHRxGMfXN2K9VReVwH+SUfch9JrimtyE5ccTX6eX5LjL8lOKhq1C4RF1mflvPlwsqfGtTGOZn0hxrfPFg= X-Received: by 2002:a05:6512:3e1f:: with SMTP id i31mr4004663lfv.661.1642209473081; Fri, 14 Jan 2022 17:17:53 -0800 (PST) MIME-Version: 1.0 References: <20220113123406.11520-1-guangming.cao@mediatek.com> <4f88205c1b344aea8608960e2f85b8f4@intel.com> <24157767-dc29-bbdd-5428-d89ecc6b9606@amd.com> <6b8182a1-7cdc-7369-5c34-e6d0c24efcca@amd.com> <82faa62f1bc946cf2f9ee2f7d15c567162238eab.camel@mediatek.com> In-Reply-To: <82faa62f1bc946cf2f9ee2f7d15c567162238eab.camel@mediatek.com> From: John Stultz Date: Fri, 14 Jan 2022 17:17:39 -0800 Message-ID: Subject: Re: [PATCH v3] dma-buf: dma-heap: Add a size check for allocation To: "Guangming.Cao" Cc: =?UTF-8?Q?Christian_K=C3=B6nig?= , "Ruhl, Michael J" , "sumit.semwal@linaro.org" , "linux-arm-kernel@lists.infradead.org" , "wsd_upstream@mediatek.com" , "libo.kang@mediatek.com" , "linux-kernel@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , "yf.wang@mediatek.com" , "linaro-mm-sig@lists.linaro.org" , "linux-mediatek@lists.infradead.org" , "lmark@codeaurora.org" , "benjamin.gaignard@linaro.org" , "bo.song@mediatek.com" , "matthias.bgg@gmail.com" , "labbott@redhat.com" , "mingyuan.ma@mediatek.com" , "jianjiao.zeng@mediatek.com" , "linux-media@vger.kernel.org" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220114_171755_694199_20F8C2B6 X-CRM114-Status: GOOD ( 30.40 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org T24gRnJpLCBKYW4gMTQsIDIwMjIgYXQgNDowNCBBTSBHdWFuZ21pbmcuQ2FvCjxndWFuZ21pbmcu Y2FvQG1lZGlhdGVrLmNvbT4gd3JvdGU6Cj4KPiBPbiBGcmksIDIwMjItMDEtMTQgYXQgMDg6MTYg KzAxMDAsIENocmlzdGlhbiBLw7ZuaWcgd3JvdGU6Cj4gPiBBbSAxNC4wMS4yMiB1bSAwMDoyNiBz Y2hyaWViIEpvaG4gU3R1bHR6Ogo+ID4gPiBPbiBUaHUsIEphbiAxMywgMjAyMiBhdCA1OjA1IEFN IENocmlzdGlhbiBLw7ZuaWcKPiA+ID4gPGNocmlzdGlhbi5rb2VuaWdAYW1kLmNvbT4gd3JvdGU6 Cj4gPiA+ID4gQW0gMTMuMDEuMjIgdW0gMTQ6MDAgc2NocmllYiBSdWhsLCBNaWNoYWVsIEo6Cj4g PiA+ID4gPiA+IC0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tCj4gPiA+ID4gPiA+IEZyb206IGRy aS1kZXZlbCA8ZHJpLWRldmVsLWJvdW5jZXNAbGlzdHMuZnJlZWRlc2t0b3Aub3JnPiBPbgo+ID4g PiA+ID4gPiBCZWhhbGYgT2YKPiA+ID4gPiA+ID4gUnVobCwgTWljaGFlbCBKCj4gPiA+ID4gPiA+ ID4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0KPiA+ID4gPiA+ID4gPiBGcm9tOiBkcmktZGV2 ZWwgPGRyaS1kZXZlbC1ib3VuY2VzQGxpc3RzLmZyZWVkZXNrdG9wLm9yZz4KPiA+ID4gPiA+ID4g PiBPbiBCZWhhbGYgT2YKPiA+ID4gPiA+ID4gPiBndWFuZ21pbmcuY2FvQG1lZGlhdGVrLmNvbQo+ ID4gPiA+ID4gPiA+ICsgICAvKgo+ID4gPiA+ID4gPiA+ICsgICAgKiBJbnZhbGlkIHNpemUgY2hl Y2suIFRoZSAibGVuIiBzaG91bGQgYmUgbGVzcyB0aGFuCj4gPiA+ID4gPiA+ID4gdG90YWxyYW0u Cj4gPiA+ID4gPiA+ID4gKyAgICAqCj4gPiA+ID4gPiA+ID4gKyAgICAqIFdpdGhvdXQgdGhpcyBj aGVjaywgb25jZSB0aGUgaW52YWxpZCBzaXplIGFsbG9jYXRpb24KPiA+ID4gPiA+ID4gPiBydW5z IG9uIGEgcHJvY2Vzcwo+ID4gPiA+ID4gPiA+IHRoYXQKPiA+ID4gPiA+ID4gPiArICAgICogY2Fu J3QgYmUga2lsbGVkIGJ5IE9PTSBmbG93KHN1Y2ggYXMgImdyYWxsb2MiIG9uCj4gPiA+ID4gPiA+ ID4gQW5kcm9pZCBkZXZpY2VzKSwgaXQKPiA+ID4gPiA+ID4gPiB3aWxsCj4gPiA+ID4gPiA+ID4g KyAgICAqIGNhdXNlIGEga2VybmVsIGV4Y2VwdGlvbiwgYW5kIHRvIG1ha2UgbWF0dGVycyB3b3Jz ZSwKPiA+ID4gPiA+ID4gPiB3ZSBjYW4ndCBmaW5kCj4gPiA+ID4gPiA+ID4gd2hvIGFyZSB1c2lu Zwo+ID4gPiA+ID4gPiA+ICsgICAgKiBzbyBtYW55IG1lbW9yeSB3aXRoICJkbWFfYnVmX2RlYnVn X3Nob3ciIHNpbmNlIHRoZQo+ID4gPiA+ID4gPiA+IHJlbGV2YW50Cj4gPiA+ID4gPiA+ID4gZG1h LWJ1ZiBoYXNuJ3QgZXhwb3J0ZWQuCj4gPiA+ID4gPiA+ID4gKyAgICAqLwo+ID4gPiA+ID4gPiA+ ICsgICBpZiAobGVuID4+IFBBR0VfU0hJRlQgPiB0b3RhbHJhbV9wYWdlcygpKQo+ID4gPiA+ID4g Pgo+ID4gPiA+ID4gPiBJZiB5b3VyICJoZWFwIiBpcyBmcm9tIGNtYSwgaXMgdGhpcyBzdGlsbCBh IHZhbGlkIGNoZWNrPwo+ID4gPiA+ID4KPiA+ID4gPiA+IEFuZCB0aGlua2luZyBhIGJpdCBmdXJ0 aGVyLCBpZiBJIGNyZWF0ZSBhIGhlYXAgZnJvbSBzb21ldGhpbmcKPiA+ID4gPiA+IGVsc2UgKHNh eSBkZXZpY2UgbWVtb3J5KSwKPiA+ID4gPiA+IHlvdSB3aWxsIG5lZWQgdG8gYmUgYWJsZSB0byBm aWd1cmUgb3V0IHRoZSBtYXhpbXVtIGFsbG93YWJsZQo+ID4gPiA+ID4gY2hlY2sgZm9yIHRoZSBz cGVjaWZpYwo+ID4gPiA+ID4gaGVhcC4KPiA+ID4gPiA+Cj4gPiA+ID4gPiBNYXliZSB0aGUgaGVh cCBuZWVkcyBhIGNhbGxiYWNrIGZvciBtYXggc2l6ZT8KPiBZZXMsIEkgYWdyZWUgd2l0aCB0aGlz IHNvbHV0aW9uLgo+IElmIGRtYS1oZWFwIGZyYW1ld29yayBzdXBwb3J0IHRoaXMgdmlhIGFkZGlu ZyBhIGNhbGxiYWNrIHRvIHN1cHBvcnQgaXQsCj4gc2VlbXMgaXQncyBtb3JlIGNsZWFyIHRoYW4g YWRkaW5nIGEgbGltaXRhdGlvbiBpbiBkbWEtaGVhcCBmcmFtZXdvcmsKPiBzaW5jZSBlYWNoIGhl YXAgbWF5YmUgaGFzIGRpZmZlcmVudCBsaW1pdGF0aW9uLgo+IElmIHlvdSBwcmVmZXIgYWRkaW5n IGNhbGxiYWNrLCBJIGNhbiB1cGRhdGUgdGhpcyBwYXRjaCBhbmQgYWRkIHRvdGFscmFtCj4gbGlt aXRhdGlvbiB0byBzeXN0ZW0gZG1hLWhlYXAuCgpJZiB0aGUgbWF4IHZhbHVlIGlzIHBlci1oZWFw LCB3aHkgbm90IGVuZm9yY2UgdGhhdCB2YWx1ZSBpbiB0aGUKcGVyLWhlYXAgYWxsb2NhdGlvbiBm dW5jdGlvbj8KCk1vdmluZyB0aGUgY2hlY2sgdG8gdGhlIGhlYXAgYWxsb2MgdG8gbWUgc2VlbXMg c2ltcGxlciB0byBtZSB0aGFuCmFkZGluZyBjb21wbGV4aXR5IHRvIHRoZSBpbmZyYXN0cnVjdHVy ZSB0byBhZGQgYSBoZWFwIG1heF9zaXplCmNhbGxiYWNrLiBJcyB0aGVyZSBzb21lIG90aGVyIHVz ZSBmb3IgdGhlIGNhbGxiYWNrIHRoYXQgeW91IGVudmlzaW9uPwoKdGhhbmtzCi1qb2huCgpfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eC1tZWRpYXRl ayBtYWlsaW5nIGxpc3QKTGludXgtbWVkaWF0ZWtAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8v bGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LW1lZGlhdGVrCg==