From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Andryuk Subject: Re: [Bug 198497] handle_mm_fault / xen_pmd_val / radix_tree_lookup_slot Null pointer Date: Tue, 4 Sep 2018 08:54:31 -0400 Message-ID: References: <20180420133951.GC10788@bombadil.infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Juergen Gross Cc: bugzilla-daemon@bugzilla.kernel.org, Matthew Wilcox , xen-devel@lists.xen.org, linux-mm@kvack.org, akpm@linux-foundation.org, labbott@redhat.com, Boris Ostrovsky List-Id: xen-devel@lists.xenproject.org T24gTW9uLCBBcHIgMjMsIDIwMTggYXQgNDoxNyBBTSBKdWVyZ2VuIEdyb3NzIDxqZ3Jvc3NAc3Vz ZS5jb20+IHdyb3RlOgo+IE9uIDIwLzA0LzE4IDE3OjIwLCBKYXNvbiBBbmRyeXVrIHdyb3RlOgo+ ID4gQWRkaW5nIHhlbi1kZXZlbCBhbmQgdGhlIExpbnV4IFhlbiBtYWludGFpbmVycy4KPiA+Cj4g PiBTdW1tYXJ5OiBTb21lIFhlbiB1c2VycyAoYW5kIG1heWJlIG90aGVycykgYXJlIGhpdHRpbmcg YSBCVUcgaW4KPiA+IF9fcmFkaXhfdHJlZV9sb29rdXAoKSB1bmRlciBkb19zd2FwX3BhZ2UoKSAt IGV4YW1wbGUgYmFja3RyYWNlIGlzCj4gPiBwcm92aWRlZCBhdCB0aGUgZW5kLiAgTWF0dGhldyBX aWxjb3ggcHJvdmlkZWQgYSBiYW5kLWFpZCBwYXRjaCB0aGF0Cj4gPiBwcmludHMgZXJyb3JzIGxp a2UgdGhlIGZvbGxvd2luZyBpbnN0ZWFkIG9mIHRyaWdnZXJpbmcgdGhlIGJ1Zy4KPiA+Cj4gPiBT a3lsYWtlIDMyYml0IFBBRSBEb20wOgo+ID4gQmFkIHN3cF9lbnRyeTogODAwMDAwMDAKPiA+IG1t L3N3YXBfc3RhdGUuYzo2ODM6IGJhZCBwdGUgZDNhMzlmMWMoODAwMDAwMDQwMDAwMDAwMCkKPiA+ Cj4gPiBJdnkgQnJpZGdlIDMyYml0IFBBRSBEb20wOgo+ID4gQmFkIHN3cF9lbnRyeTogNDAwMDAw MDAKPiA+IG1tL3N3YXBfc3RhdGUuYzo2ODM6IGJhZCBwdGUgZDNhMDVmMWMoODAwMDAwMDIwMDAw MDAwMCkKPiA+Cj4gPiBPdGhlciAzMmJpdCBEb21VOgo+ID4gQmFkIHN3cF9lbnRyeTogNDAwMDAw MAo+ID4gbW0vc3dhcF9zdGF0ZS5jOjY4MzogYmFkIHB0ZSBlMjE4N2YzMCg4MDAwMDAwMjAwMDAw MDAwKQo+ID4KPiA+IE90aGVyIDMyYml0Ogo+ID4gQmFkIHN3cF9lbnRyeTogMjAwMDAwMAo+ID4g bW0vc3dhcF9zdGF0ZS5jOjY4MzogYmFkIHB0ZSBlZjNhM2YzOCg4MDAwMDAwMTAwMDAwMDAwKQo+ ID4KPiA+IFRoZSBMaW51eCBidWd6aWxsYSBoYXMgbW9yZSBpbmZvCj4gPiBodHRwczovL2J1Z3pp bGxhLmtlcm5lbC5vcmcvc2hvd19idWcuY2dpP2lkPTE5ODQ5Nwo+ID4KPiA+IFRoaXMgbWF5IG5v dCBiZSBleGNsdXNpdmUgdG8gWGVuIExpbnV4LCBidXQgbW9zdCBvZiB0aGUgcmVwb3J0cyBhcmUg b24KPiA+IFhlbi4gIE1hdHRoZXcgd29uZGVycyBpZiBYZW4gbWlnaHQgYmUgc3RlcHBpbmcgb24g dGhlIHVwcGVyIGJpdHMgb2YgYQo+ID4gcHRlLgo+ID4KPHNuaXA+Cj4KPiBDb3VsZCBpdCBiZSB3 ZSBqdXN0IGhhdmUgYSByYWNlIHJlZ2FyZGluZyBwdGVfY2xlYXIoKT8gVGhpcyB3aWxsIHNldAo+ IHRoZSBsb3cgcGFydCBvZiB0aGUgcHRlIHRvIHplcm8gZmlyc3QgYW5kIHRoZW4gdGhlIGhpZ2h0 IHBhcnQuCj4KPiBJbiBjYXNlIHB0ZV9jbGVhcigpIGlzIHVzZWQgaW4gaW50ZXJydXB0IG1vZGUg ZXNwZWNpYWxseSBYZW4gd2lsbCBiZQo+IHJhdGhlciBzbG93IGFzIGl0IGVtdWxhdGVzIHRoZSB0 d28gd3JpdGVzIHRvIHRoZSBwYWdlIHRhYmxlIHJlc3VsdGluZwo+IGluIGEgbGFyZ2VyIHdpbmRv dyB3aGVyZSB0aGUgcmFjZSBtaWdodCBoYXBwZW4uCgpJdCBsb29rcyBsaWtlIEp1ZXJnZW4gd2Fz IGNvcnJlY3QuICBXaXRoIHRoZSBMMVRGIHZ1bG5lcmFiaWxpdHksIHRoZQpYZW4gaHlwZXJ2aXNv ciBuZWVkcyB0byBkZXRlY3QgdnVsbmVyYWJsZSBQVEVzLiAgRm9yIDMyYml0IFBBRSwgWGVuCndv dWxkIHRyYXAgb24gUFRFcyBsaWtlIDB4ODAwMCcwMDAyJzAwMDAnMDAwMCAgLSB0aGUgc2FtZSBm b3JtYXQgYXMKc2VlbiBpbiB0aGlzIGJ1Zy4gIEhlIHdyb3RlIHR3byBwYXRjaGVzIGZvciBMaW51 eCwgbm93IHVwc3RyZWFtLCB0bwp3cml0ZSBQVEVzIHdpdGggNjRiaXQgb3BlcmF0aW9ucyBvciBo eXBlcmNhbGxzIGFuZCBhdm9pZCB0aGUgaW52YWxpZApQVEVzOgpmN2M5MGMyYWE0MDAgIng4Ni94 ZW46IGRvbid0IHdyaXRlIHB0ZXMgZGlyZWN0bHkgaW4gMzItYml0IFBWIGd1ZXN0cyIKYjJkN2Ew NzVhMWNjICJ4ODYvcGFlOiB1c2UgNjQgYml0IGF0b21pYyB4Y2hnIGZ1bmN0aW9uIGluCm5hdGl2 ZV9wdGVwX2dldF9hbmRfY2xlYXIiCgpXaXRoIHRob3NlIHBhdGNoZXMsIEkgaGF2ZSBub3Qgc2Vl biBhICJCYWQgc3dwX2VudHJ5Iiwgc28gdGhpcyBzZWVtcwpmaXhlZCBmb3IgbWUgb24gWGVuLgoK VGhlcmUgd2FzIGFsc28gYSByZXBvcnQgb2YgYSBub24tWGVuIGtlcm5lbCBiZWluZyBhZmZlY3Rl ZC4gIElzIHRoZXJlCmFuIHVuZGVybHlpbmcgcHJvYmxlbSB0aGF0IG5hdGl2ZSBQQUUgY29kZSB1 cGRhdGVzIFBURXMgaW4gdHdvIHdyaXRlcywKYnV0IHRoZXJlIGlzIG5vIGxvY2tpbmcgdG8gcHJl dmVudCB0aGUgaW50ZXJtZWRpYXRlIFBURSBmcm9tIGJlaW5nCnVzZWQgZWxzZXdoZXJlIGluIHRo ZSBrZXJuZWw/CgpSZWdhcmRzLApKYXNvbgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMu eGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3Rp bmZvL3hlbi1kZXZlbA==