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Fri, 09 Feb 2024 13:07:22 -0800 (PST) Date: Fri, 9 Feb 2024 13:07:20 -0800 In-Reply-To: <000000000000f6d051060c6785bc@google.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <000000000000f6d051060c6785bc@google.com> Message-ID: Subject: Re: [syzbot] [kvm?] WARNING in kvm_mmu_notifier_change_pte From: Sean Christopherson To: syzbot Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, pbonzini@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="us-ascii" On Wed, Dec 13, 2023, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: f2e8a57ee903 Merge tag 'scsi-fixes' of git://git.kernel.or.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=14fdc732e80000 > kernel config: https://syzkaller.appspot.com/x/.config?x=e56083f7dbe162c2 > dashboard link: https://syzkaller.appspot.com/bug?extid=81227d2bd69e9dedb802 > compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=129d09cae80000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10b8afeee80000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/7b75e59fc59d/disk-f2e8a57e.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/f853580d61be/vmlinux-f2e8a57e.xz > kernel image: https://storage.googleapis.com/syzbot-assets/8c893ce02e2c/bzImage-f2e8a57e.xz > > Bisection is inconclusive: the first bad commit could be any of: > > d61ea1cb0095 userfaultfd: UFFD_FEATURE_WP_ASYNC > 52526ca7fdb9 fs/proc/task_mmu: implement IOCTL to get and optionally clear info about PTEs #syz fix: fs/proc/task_mmu: move mmu notification mechanism inside mm lock