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AJvYcCXJRqQUpcVigME1d95A+jFObbZYlcPE0m7RpOfcGT/SrNJ+5G90ns0HVgcNOYVpYoZqXtvulofTR4o6/hk=@vger.kernel.org X-Gm-Message-State: AOJu0Yxx6KMsTewna/f4ciwdiG+D0S+lxAhEYmoyerbG0vuVRQ2xEf2L /5HRtOAiHN5TMg2bxcguFIX95pKeaK+MrITs/vpolcd5Lgij5cSXX+Uk2Wd/gIdwyrGYvEOwkB5 cQYcYyQ== X-Google-Smtp-Source: AGHT+IH+UwqXdEYCE1CocvyH9lqBSvO8TdLxvBs8Mxx9vAQZb1++QLKCMGGhKByvzH6gbci2kJYM9jTLdWI= X-Received: from pjob8.prod.google.com ([2002:a17:90a:8c88:b0:33b:51fe:1a7a]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:3806:b0:32b:6820:6509 with SMTP id 98e67ed59e1d1-34027a0741emr78274a91.9.1761576109905; Mon, 27 Oct 2025 07:41:49 -0700 (PDT) Date: Mon, 27 Oct 2025 07:41:47 -0700 In-Reply-To: <20251025015852.8771-1-hdanton@sina.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <68fb1966.050a0220.346f24.0093.GAE@google.com> <20251025015852.8771-1-hdanton@sina.com> Message-ID: Subject: Re: [syzbot] [kvm?] KASAN: slab-use-after-free Write in kvm_gmem_release From: Sean Christopherson To: Hillf Danton Cc: syzbot , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tabba@google.com, xiaoyao.li@intel.com Content-Type: text/plain; charset="us-ascii" On Sat, Oct 25, 2025, Hillf Danton wrote: > On Thu, Oct 23, 2025, syzbot wrote: > > syzbot has bisected this issue to: > > > > commit d1e54dd08f163a9021433020d16a8f8f70ddc41c > > Author: Fuad Tabba > > Date: Tue Jul 29 22:54:40 2025 +0000 > > > > KVM: x86: Enable KVM_GUEST_MEMFD for all 64-bit builds > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12a663cd980000 > > start commit: 43e9ad0c55a3 Merge tag 'scsi-fixes' of git://git.kernel.or.. > > git tree: upstream > > final oops: https://syzkaller.appspot.com/x/report.txt?x=11a663cd980000 > > console output: https://syzkaller.appspot.com/x/log.txt?x=16a663cd980000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=67b63a24f3c26fca > > dashboard link: https://syzkaller.appspot.com/bug?extid=2479e53d0db9b32ae2aa > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=173ecd2f980000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14bc2be2580000 > > Test Sean's fix. > > #syz test linux-next master Oh, nice. Thanks Hillf!