From mboxrd@z Thu Jan 1 00:00:00 1970 From: ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org (Eric W. Biederman) Subject: Re: ucount: use-after-free read in inc_ucount & dec_ucount Date: Sun, 05 Mar 2017 15:00:25 -0600 Message-ID: <87efybfnh2.fsf@xmission.com> References: <180fb7dc-790e-8e82-0cc1-c6e15ddcd20b@gmail.com> <87pohy1fx6.fsf@xmission.com> <1aafd5e9-d9de-e5d9-a77d-cf245c5a5c6a@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: (=?utf-8?B?IuyqvOultCIncw==?= message of "Sat, 4 Mar 2017 21:35:24 +0900") List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: =?utf-8?B?7Kq866W0?= Cc: syzkaller , containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Jan Kara , Dmitry Vyukov List-Id: containers.vger.kernel.org 7Kq866W0IDx6em9ydTAwN0BnbWFpbC5jb20+IHdyaXRlczoKCj4gSGksIFRoaXMgaXMgbXkgbmV3 IG9uZSByZXBvcnQgYWJvdXQgZGVjX3Vjb3VudDoKPiBwcy5Tb3JyeSBmb3IgbXkgdW5jb21mb3J0 YWJsZSByZXBvcnQuIFRoaXMgaXMgbXkgZmlyc3QgdXNhZ2Ugb2YgbGttbC4gCj4gU3l6a2FsbGVy IGhpdCAnS0FTQU46IHVzZS1hZnRlci1mcmVlIFJlYWQgaW4gZGVjX3Vjb3VudCcgYnVnIG9uIGNv bW1pdAo+IC4KCllvdSBhcmUgZG9pbmcgd2VsbC4gIFRoYW5rIHlvdSB2ZXJ5IG11Y2ggZm9yIHRo ZSByZXBvcnQuCgpUaGFuayB5b3UgZm9yIHRoZSByZXByb2R1Y2VyLiAgVW5mb3J0dW5hdGVseSBJ IGFtIG5vdCBhYmxlIHRvIHJlcHJvZHVjZQp0aGUgYnVnIHdpdGggd2hhdCB0aGUgY29kZSB5b3Ug aGF2ZSBwb3N0ZWQgaGVyZS4KCkZyb20gdGhlIGluaXRpYWwgbWFpbGluZyB0aGUgY29kZSBzYWlk OgoKPiBTeXprYWxsZXIgcmVwcm9kdWNlcjoKPiAjIHtUaHJlYWRlZDpmYWxzZSBDb2xsaWRlOmZh bHNlIFJlcGVhdDp0cnVlIFByb2NzOjQgU2FuZGJveDpzZXR1aWQKPiBSZXBybzpmYWxzZX0KPiBp bm90aWZ5X2luaXQoKQoKVGhlIGNvZGUgeW91IHBvc3RlZCBzYXlzOgoKPiBTeXprYWxsZXIgcmVw cm9kdWNlcjoKPiAjIHtUaHJlYWRlZDpmYWxzZSBDb2xsaWRlOmZhbHNlIFJlcGVhdDp0cnVlIFBy b2NzOjEgU2FuZGJveDpzZXR1aWQgUmVwcm86ZmFsc2V9Cj4gc2VtZ2V0JHByaXZhdGUoMHgwLCAw eDQwMDAwMTAwMywgMHgxODEpCgpTbyBJIGV4cGVjdCBzeXprYWxsZXIgZGlkIG5vdCBjcmVhdGUg dGhlIHNhbWUgY29kZSB3aGVuIHlvdSByYW4gaXQKYWdhaW4uICBTb21ldGhpbmcgZWFzeSB0byBt aXNzIGlmIHlvdSBoYXZlbid0IHJ1biB1c2VkIGEgdG9vbCBsaWtlIHRoYXQKbXVjaC4KCklmIHNv bWVvbmUga25vd3MgaG93IHRvIGdldCB0aGUgY29kZSB0aGF0IHN5emthbGxlciB3b3VsZCBnZW5l cmF0ZSB0aGF0Cm1hdGNoZXMgdGhlIG9yaWdpbmFsIHJlcHJvZHVjZXIgSSB3b3VsZCB2ZXJ5IG11 Y2ggYXBwcmVjaWF0ZSBpdCBzbyB0aGF0CndlIGNhbiBjb25maXJtIHRoZSBidWcgd2UgaGF2ZSBz cG90dGVkIGluIHRoZSBjb2RlIGlzIHRoZSBidWcgc3l6a2FsbGVyCmZvdW5kLgoKVW50aWwgdGhh dCBwb2ludCBJIGFtIGdvaW5nIHRvIGZpeCB0aGUgb2J2aW91cyBidWcgaW4gdGhlIGNvZGUgYW5k IGhvcGUKdGhhdCBmaXhlcyB0aGUgcHJvYmxlbS4KCkVyaWMKX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX18KQ29udGFpbmVycyBtYWlsaW5nIGxpc3QKQ29udGFp bmVyc0BsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRh dGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9jb250YWluZXJz