From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f198.google.com (mail-oi1-f198.google.com [209.85.167.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D77051390 for ; Sun, 16 Jul 2023 02:57:24 +0000 (UTC) Received: by mail-oi1-f198.google.com with SMTP id 5614622812f47-3a41b765478so6252175b6e.0 for ; Sat, 15 Jul 2023 19:57:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689476244; x=1692068244; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=AV1p85HbsZJ9THimnEm3QDwwQ23M02O0o2ECpycPfwE=; b=FbuFN0fPtH+QE71z/H1xxd9Dv5iiCRnqzek9+S8a41r5rB7i64L96hXuzIny5gO4ML /tXwsKa1WHT8K3JeDsFfVgTD0l2ZwtCxM+27OxASZUXSfg9fJ127clB+du9Uq6hXIZJm HMHRkC27sRRAASnVSbkWe1Yvf/E8kqlYctw6GZwZH9x2SSU2RuD2hZ7kg4U2rm4IpbdS 9GqnakuIcA5poY8uD29b3mLjQ+JhFH1HhkgEA8QjedCM2BdPB/aSnXwJrD7ueN6SlUqU HsI0K6DcK/k5mfAG33yMnjkfF00gezMyPPErFIGXlQGoYs2evTudrKzz5I/BuHPjM7DX BFOg== X-Gm-Message-State: ABy/qLYKgipJZqIq6dPnrfFsGYR4cgbQSC1TqxjAuCvMeuDyJETsCuMI 76xkJw2n2GlBjHIKXPap1zzlqbIN/3+jENEQgZTZqT0Ksf02 X-Google-Smtp-Source: APBJJlHXRLig0RINXY3j+dbjr1Lw0gM/KWkDKlJRrUJRkV/EIhqOm6+gsAeWprJYorKp04zmsmZJzjX1koudKJo1771XcG86+k/s Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:30a5:b0:3a4:4b42:5ce1 with SMTP id bl37-20020a05680830a500b003a44b425ce1mr4442302oib.3.1689476243880; Sat, 15 Jul 2023 19:57:23 -0700 (PDT) Date: Sat, 15 Jul 2023 19:57:23 -0700 In-Reply-To: <00000000000054bd5b06006df9c8@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000005f80ad060091d7cb@google.com> Subject: Re: [syzbot] [iommu?] WARNING in iommufd_access_destroy From: syzbot To: alex.williamson@redhat.com, iommu@lists.linux.dev, jgg@nvidia.com, jgg@ziepe.ca, joro@8bytes.org, kevin.tian@intel.com, linux-kernel@vger.kernel.org, nicolinc@nvidia.com, robin.murphy@arm.com, syzkaller-bugs@googlegroups.com, terrence.xu@intel.com, will@kernel.org, yi.l.liu@intel.com Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit 54b47585db6658a5eb898d4d45be18d1e581c1bf Author: Nicolin Chen Date: Mon Mar 27 09:33:47 2023 +0000 iommufd: Create access in vfio_iommufd_emulated_bind() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16549b42a80000 start commit: b6e6cc1f78c7 Merge tag 'x86_urgent_for_6.5_rc2' of git://g.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=15549b42a80000 console output: https://syzkaller.appspot.com/x/log.txt?x=11549b42a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=6769a69bd0e144b4 dashboard link: https://syzkaller.appspot.com/bug?extid=7574ebfe589049630608 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=123562dca80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15825e1aa80000 Reported-by: syzbot+7574ebfe589049630608@syzkaller.appspotmail.com Fixes: 54b47585db66 ("iommufd: Create access in vfio_iommufd_emulated_bind()") For information about bisection process see: https://goo.gl/tpsmEJ#bisection