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Fri, 21 Oct 2022 21:24:06 +0800 Subject: Re: [PATCH 1/2] ubi: Fix use-after-free when volume resizing failed To: Li Zetao , , , , , , CC: , , References: <20221021102157.1341807-1-lizetao1@huawei.com> <20221021102157.1341807-2-lizetao1@huawei.com> From: Zhihao Cheng Message-ID: <017d217a-5497-2627-afe3-c3c4ef70723a@huawei.com> Date: Fri, 21 Oct 2022 21:24:06 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20221021102157.1341807-2-lizetao1@huawei.com> X-Originating-IP: [10.174.178.46] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To kwepemm600013.china.huawei.com (7.193.23.68) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221021_062413_967000_3DCF409E X-CRM114-Status: GOOD ( 17.71 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="gbk"; Format="flowed" Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org 1NogMjAyMi8xMC8yMSAxODoyMSwgTGkgWmV0YW8g0LS1wDoKPiBUaGVyZSBpcyBhbiB1c2UtYWZ0 ZXItZnJlZSBwcm9ibGVtIHJlcG9ydGVkIGJ5IEtBU0FOOgo+ICAgID09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQo+ICAgIEJV RzogS0FTQU46IHVzZS1hZnRlci1mcmVlIGluIHViaV9lYmFfY29weV90YWJsZSsweDExZi8weDFj MCBbdWJpXQo+ICAgIFJlYWQgb2Ygc2l6ZSA4IGF0IGFkZHIgZmZmZjg4ODEwMWVlYzAwOCBieSB0 YXNrIHViaXJzdm9sLzQ3MzUKPgo+ICAgIENQVTogMiBQSUQ6IDQ3MzUgQ29tbTogdWJpcnN2b2wK PiAgICBOb3QgdGFpbnRlZCA2LjEuMC1yYzEtMDAwMDMtZzg0ZmEzMzA0YTdmYy1kaXJ0eSAjMTQK PiAgICBIYXJkd2FyZSBuYW1lOiBRRU1VIFN0YW5kYXJkIFBDIChpNDQwRlggKyBQSUlYLCAxOTk2 KSwKPiAgICBCSU9TIDEuMTQuMC0xLmZjMzMgMDQvMDEvMjAxNAo+ICAgIENhbGwgVHJhY2U6Cj4g ICAgIDxUQVNLPgo+ICAgICBkdW1wX3N0YWNrX2x2bCsweDM0LzB4NDQKPiAgICAgcHJpbnRfcmVw b3J0KzB4MTcxLzB4NDcyCj4gICAgIGthc2FuX3JlcG9ydCsweGFkLzB4MTMwCj4gICAgIHViaV9l YmFfY29weV90YWJsZSsweDExZi8weDFjMCBbdWJpXQo+ICAgICB1YmlfcmVzaXplX3ZvbHVtZSsw eDRmOS8weGJjMCBbdWJpXQo+ICAgICB1YmlfY2Rldl9pb2N0bCsweDcwMS8weDE4NTAgW3ViaV0K PiAgICAgX194NjRfc3lzX2lvY3RsKzB4MTFkLzB4MTcwCj4gICAgIGRvX3N5c2NhbGxfNjQrMHgz NS8weDgwCj4gICAgIGVudHJ5X1NZU0NBTExfNjRfYWZ0ZXJfaHdmcmFtZSsweDQ2LzB4YjAKPiAg ICAgPC9UQVNLPgo+Cj4gV2hlbiB1YmlfY2hhbmdlX3Z0YmxfcmVjb3JkKCkgcmV0dXJucyBhbiBl cnJvciBpbiB1YmlfcmVzaXplX3ZvbHVtZSgpLAo+ICJuZXdfZWJhX3RibCIgd2lsbCBiZSBmcmVl ZCBvbiBlcnJvciBoYW5kaW5nIHBhdGgsIGJ1dCBpdCBpcyBob2xkZWQKPiBieSAidm9sLT5lYmFf dGJsIiBpbiB1YmlfZWJhX3JlcGxhY2VfdGFibGUoKS4gSXQgbWVhbnMgdGhhdCB0aGUgbGlmdGN5 Y2xlCj4gb2YgInZvbC0+ZWJhX3RibCIgYW5kICJ2b2wiIGFyZSBkaWZmZXJlbnQsIHNvIHdoZW4g cmVzaXppbmcgdm9sdW1lIGluCj4gbmV4dCB0aW1lLCBpdCBjYXVzaW5nIGFuIHVzZS1hZnRlci1m cmVlIGZhdWx0Lgo+Cj4gRml4IGl0IGJ5IG5vdCBmcmVlaW5nICJuZXdfZWJhX3RibCIgYWZ0ZXIg aXQgcmVwbGFjZWQgaW4KPiB1YmlfZWJhX3JlcGxhY2VfdGFibGUoKSwgd2hpbGUgd2lsbCBiZSBm cmVlZCBpbiBuZXh0IHZvbHVtZSByZXNpemluZy4KPgo+IEZpeGVzOiA4MDFjMTM1Y2U3M2QgKCJV Qkk6IFVuc29ydGVkIEJsb2NrIEltYWdlcyIpCj4gU2lnbmVkLW9mZi1ieTogTGkgWmV0YW8gPGxp emV0YW8xQGh1YXdlaS5jb20+Cj4gLS0tCj4gICBkcml2ZXJzL210ZC91Ymkvdm10LmMgfCA0ICsr Ky0KPiAgIDEgZmlsZSBjaGFuZ2VkLCAzIGluc2VydGlvbnMoKyksIDEgZGVsZXRpb24oLSkKPgo+ IGRpZmYgLS1naXQgYS9kcml2ZXJzL210ZC91Ymkvdm10LmMgYi9kcml2ZXJzL210ZC91Ymkvdm10 LmMKPiBpbmRleCA4ZmNjMGJkZjA2MzUuLjc0NjM3NTc1MzQ2ZSAxMDA2NDQKPiAtLS0gYS9kcml2 ZXJzL210ZC91Ymkvdm10LmMKPiArKysgYi9kcml2ZXJzL210ZC91Ymkvdm10LmMKPiBAQCAtNDY0 LDcgKzQ2NCw3IEBAIGludCB1YmlfcmVzaXplX3ZvbHVtZShzdHJ1Y3QgdWJpX3ZvbHVtZV9kZXNj ICpkZXNjLCBpbnQgcmVzZXJ2ZWRfcGVicykKPiAgIAkJZm9yIChpID0gMDsgaSA8IC1wZWJzOyBp KyspIHsKPiAgIAkJCWVyciA9IHViaV9lYmFfdW5tYXBfbGViKHViaSwgdm9sLCByZXNlcnZlZF9w ZWJzICsgaSk7Cj4gICAJCQlpZiAoZXJyKQo+IC0JCQkJZ290byBvdXRfYWNjOwo+ICsJCQkJZ290 byBvdXRfZnJlZTsKPiAgIAkJfQo+ICAgCQlzcGluX2xvY2soJnViaS0+dm9sdW1lc19sb2NrKTsK PiAgIAkJdWJpLT5yc3ZkX3BlYnMgKz0gcGViczsKPiBAQCAtNTEyLDYgKzUxMiw4IEBAIGludCB1 YmlfcmVzaXplX3ZvbHVtZShzdHJ1Y3QgdWJpX3ZvbHVtZV9kZXNjICpkZXNjLCBpbnQgcmVzZXJ2 ZWRfcGVicykKPiAgIAkJdWJpLT5hdmFpbF9wZWJzICs9IHBlYnM7Cj4gICAJCXNwaW5fdW5sb2Nr KCZ1YmktPnZvbHVtZXNfbG9jayk7Cj4gICAJfQo+ICsJcmV0dXJuIGVycjsKPiArCj4gICBvdXRf ZnJlZToKPiAgIAlrZnJlZShuZXdfZWJhX3RibCk7Cj4gICAJcmV0dXJuIGVycjsKClJldmlld2Vk LWJ5OiBaaGloYW8gQ2hlbmcgPGNoZW5nemhpaGFvMUBodWF3ZWkuY29tPgoKCl9fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eCBNVEQgZGlz Y3Vzc2lvbiBtYWlsaW5nIGxpc3QKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9s aXN0aW5mby9saW51eC1tdGQvCg==