From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: usb: dwc3: of-simple: fix use-after-free on remove From: Alan Stern Message-Id: Date: Thu, 21 Jun 2018 11:15:11 -0400 (EDT) To: Roger Quadros Cc: "Rafael J. Wysocki" , Johan Hovold , "Rafael J. Wysocki" , Tony Lindgren , Felipe Balbi , Tero Kristo , Greg Kroah-Hartman , "open list:ULTRA-WIDEBAND \(UWB\) SUBSYSTEM:" , "Nori, Sekhar" , Grygorii Strashko , Nishanth Menon , Linux PM List-ID: T24gVGh1LCAyMSBKdW4gMjAxOCwgUm9nZXIgUXVhZHJvcyB3cm90ZToKCj4gPj4+IHByb2JlKCkK PiA+Pj4gICAgICAgICBwbV9ydW50aW1lX2ZvcmJpZCgpICAgICAgICAgICAgIDEKPiAKPiBDYW4g eW91IGNhbGwgcG1fcnVudGltZV9mb3JiaWQoKSBiZWZvcmUgcG1fcnVudGltZV9lbmFibGUoKT8K PiBXb3VsZG4ndCBpdCBmYWlsIHdpdGggLUVBQ0NFUyBhcyBkZXYtPnBvd2VyLmRpc2FibGVfZGVw dGggPiAwPwoKTG9vaywgdGhlcmUgaGFzIGJlZW4gYSBsb3Qgb2YgY29uZnVzaW9uIGluIHRoaXMg ZW1haWwgdGhyZWFkLiAgTGV0J3MgCmdldCBzb21lIHRoaW5ncyBzdHJhaWdodGVuZWQgb3V0IGJl Zm9yZSBpdCBnb2VzIG11Y2ggZmFydGhlci4KClRoZXJlIGFyZSBvbmx5IGEgdmVyeSBmZXcgcmVh c29ucyBmb3IgZXZlciBjYWxsaW5nIHBtX3J1bnRpbWVfZm9yYmlkKCkgCm9yIHBtX3J1bnRpbWVf YWxsb3coKSBhdCBhbnkgdGltZSBvdGhlciB0aGFuIGp1c3QgYmVmb3JlIHRoZSBkZXZpY2UgaXMg CnJlZ2lzdGVyZWQuICBJbiBmYWN0LCBJIGNhbiBvbmx5IHRoaW5rIG9mIG9uZSByZWFzb24gYXQg dGhlIG1vbWVudDoKCglJZiBhIGRldmljZSBiZWxvbmdzIHRvIGEgY2xhc3Mgd2hpY2ggaXMgd2Vs bCBrbm93biB0byBoYXZlCglleGNlbGxlbnQgc3VwcG9ydCBmb3IgcnVudGltZSBQTSwgYSBkcml2 ZXIgbWlnaHQgd2FudCB0bwoJY2FsbCBwbV9ydW50aW1lX2FsbG93KCkuCgpCdXQgaW4gZ2VuZXJh bCwgYSBkcml2ZXIgc2hvdWxkIG5vdCBjYWxsIHRoZXNlIHJvdXRpbmVzLiAgVGhlIGRlY2lzaW9u CmFib3V0IHdoZXRoZXIgb3Igbm90IGEgZGV2aWNlIHNob3VsZCBiZSBhbGxvd2VkIHRvIGdvIGlu dG8gcnVudGltZQpzdXNwZW5kIGlzIGEgcG9saWN5IG1hdHRlciBhbmQgdGhlcmVmb3JlIHNob3Vs ZCBiZSBkZWNpZGVkIGJ5IHRoZQp1c2VyLCBub3QgYnkgdGhlIGtlcm5lbC4gIEZ1cnRoZXJtb3Jl LCB0aGVzZSBjYWxscyBtZXJlbHkgc2V0IGEgZGVmYXVsdAp2YWx1ZTsgdGhlIGRlZmF1bHQgY2Fu IGJlIG92ZXJyaWRkZW4gYnkgdGhlIHVzZXIgYXQgYW55IHRpbWUgYW5kCnRoZXJlZm9yZSBhIGRy aXZlciBjYW5ub3QgZGVwZW5kIG9uIHRoZXNlIGZ1bmN0aW9ucyBmb3IgYW55dGhpbmcuCgoKQW5v dGhlciBwb2ludCBvZiBjb25mdXNpb24gaW52b2x2ZXMgYmFsYW5jaW5nIHBtX3J1bnRpbWVfZ2V0 XyogYW5kCnBtX3J1bnRpbWVfcHV0XyogY2FsbHMuICBUaGV5IHNob3VsZCBhbHdheXMgZW5kIHVw IGluIGJhbGFuY2UsIGFuZCBhdAphbnkgbW9tZW50IHRoZXJlIG5ldmVyIHNob3VsZCBiZSBtb3Jl IHB1dCdzIHRoYW4gZ2V0J3MgZXhjZXB0IGluIG9uZQp2ZXJ5IHBhcnRpY3VsYXIgY2lyY3Vtc3Rh bmNlOgoKCVRoZSBidXMgc3lzdGVtIG1heSBndWFyYW50ZWUgdG8gaW52b2tlIHByb2JlIGNhbGxi YWNrcyBhZnRlcgoJcGVyZm9ybWluZyBhbiBleHRyYSBnZXQsIGFuZCB0byBwZXJmb3JtIGFuIGV4 dHJhIHB1dCBhZnRlcgoJaW52b2tpbmcgcmVtb3ZlIGNhbGxiYWNrcyAodGhlIFBDSSBzdWJzeXN0 ZW0gZG9lcyB0aGlzKS4gIAoJVGhpcyBjYW4gYmUgdXNlZnVsIHdoZW4gYSBsb3Qgb2YgZHJpdmVy cyBkb24ndCBzdXBwb3J0IHJ1bnRpbWUgCglQTTsgdGhlIGV4dHJhIGdldCBpbnN1cmVzIHRoYXQg dGhlIFBNIGNvcmUgd2lsbCBuZXZlciB0cnkgdG8KCXN1c3BlbmQgdGhlIGRldmljZSB3aGlsZSBz dWNoIGEgZHJpdmVyIGlzIGJvdW5kIHRvIGl0LiAgQSAKCWRyaXZlciB0aGF0IF9kb2VzXyBzdXBw b3J0IHJ1bnRpbWUgUE0gd291bGQgZG8gYW4gZXh0cmEgCglwbV9ydW50aW1lX3B1dCBhdCB0aGUg ZW5kIG9mIGl0cyBwcm9iZSByb3V0aW5lIGFuZCBhbiBleHRyYQoJcG1fcnVudGltZV9nZXRfc3lu YyBpbiBpdHMgcmVtb3ZlIHJvdXRpbmU7IHRoaXMgd2lsbCBhbGxvdyAKCXJ1bnRpbWUgUE0gdG8g d29yayB3aGlsZSBrZWVwaW5nIHRoZSBjb3VudHMgbm9uLW5lZ2F0aXZlLgoKVGhhdCdzIHRoZSBv bmx5IHNpdHVhdGlvbiBJIGtub3cgb2Ygd2hlcmUgaXQncyByZWFzb25hYmxlIHRvIGhhdmUgbW9y ZQpwdXRzIHRoYW4gZ2V0cy4gIFRoZSBQQ0kgc3Vic3lzdGVtIGRvZXMgdGhpcywgYW5kIHRvIGJl IHBlcmZlY3RseQpob25lc3QsIEkgZG8gbm90IHJlbWVtYmVyIHdoeSBsb2NhbF9wY2lfcHJvYmUo KSByZWNvbW1lbmRzIHRoYXQgZHJpdmVycwpjYWxsIHBtX3J1bnRpbWVfcHV0X25vaWRsZSByYXRo ZXIgdGhhbiBwbV9ydW50aW1lX3B1dC4gIE9uIHRoZSBmYWNlIG9mCml0LCB0aGlzIHdvdWxkIGFs bG93IHRoZSBQTSB1c2FnZSBjb3VudGVyIHRvIGdvIHRvIDAgd2l0aG91dCB0cmlnZ2VyaW5nCmFu IGltbWVkaWF0ZSBydW50aW1lIHN1c3BlbmQuCgpBbGFuIFN0ZXJuCi0tLQpUbyB1bnN1YnNjcmli ZSBmcm9tIHRoaXMgbGlzdDogc2VuZCB0aGUgbGluZSAidW5zdWJzY3JpYmUgbGludXgtdXNiIiBp bgp0aGUgYm9keSBvZiBhIG1lc3NhZ2UgdG8gbWFqb3Jkb21vQHZnZXIua2VybmVsLm9yZwpNb3Jl IG1ham9yZG9tbyBpbmZvIGF0ICBodHRwOi8vdmdlci5rZXJuZWwub3JnL21ham9yZG9tby1pbmZv Lmh0bWwK