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[95.249.145.232]) by smtp.gmail.com with ESMTPSA id h12-20020a1709060f4c00b006b4ec988cc3sm1886020ejj.4.2022.03.24.22.47.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Mar 2022 22:47:45 -0700 (PDT) From: "Fabio M. De Francesco" To: syzbot , syzkaller-bugs@googlegroups.com, Muchun Song , Linus Torvalds Cc: Andrew Morton , Dmitry Vyukov , Linux Kernel Mailing List , Linux-MM , syzkaller-bugs Subject: Re: [syzbot] general protection fault in list_lru_add Date: Fri, 25 Mar 2022 06:47:36 +0100 Message-ID: <12984828.uLZWGnKmhe@leap> In-Reply-To: References: <0000000000009901d505dafc07b3@google.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=j0bY711F; spf=none (imf19.hostedemail.com: domain of mail-ej1-f50.google.com has no SPF policy when checking 209.85.218.50) smtp.helo=mail-ej1-f50.google.com; dmarc=pass (policy=none) header.from=gmail.com X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: E983A1A002E X-Stat-Signature: 9kxrpp4ygauyjqbm7cf15aner6cqzum7 X-HE-Tag: 1648187267-228189 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On gioved=C3=AC 24 marzo 2022 20:45:00 CET Linus Torvalds wrote: > On Thu, Mar 24, 2022 at 12:41 PM syzbot > wrote: > > > > syzbot has tested the proposed patch and the reproducer did not trigger= any issue: >=20 > Heh, well that's unfortunate. >=20 > I think the issue is that it triggered a new BUG() that didn't match > the previous NULL pointer dereference, so it thinks things are > "fixed". >=20 > Linus >=20 > --=20 > You received this message because you are subscribed to the Google Groups= "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an= email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgi= d/syzkaller-bugs/CAHk-%3DwhxaFX4nqnE-SLHTGKyqejvbrhYx5sagcxWd%2BUWCMf8dg%40= mail.gmail.com. >=20 No, not at all, Linus! Unless I'm still sleeping with wide open eyes (it's 6.30 AM here), you are = misunderstanding=20 this message from Syzbot :) This message means that Syzbot has applied and tested the patch and now is = not=20 anymore able to trigger any bug. In summation it means that the patch works= properly. Now Muchun should simply submit his patch (the usual way) with a "Fixes:" t= ag=20 and with "Reported-and-tested-by: syzbot+f8c45ccc7d5d45fc5965@syzkaller.app= spotmail.com". Thanks, =46abio M. De Francesco