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Tsirkin" To: Sean Christopherson Cc: syzbot , eperezma@redhat.com, jasowang@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, virtualization@lists.linux.dev, Mike Christie , oleg@redhat.com, ebiederm@xmission.com, sgarzare@redhat.com, stefanha@redhat.com, brauner@kernel.org Subject: Re: [syzbot] [kvm?] [net?] [virt?] INFO: task hung in __vhost_worker_flush Message-ID: <20240816141505-mutt-send-email-mst@kernel.org> References: <000000000000fd6343061fd0d012@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Fri, Aug 16, 2024 at 11:10:32AM -0700, Sean Christopherson wrote: > On Fri, Aug 16, 2024, syzbot wrote: > > > On Wed, May 29, 2024, syzbot wrote: > > >> Hello, > > >> > > >> syzbot found the following issue on: > > >> > > >> HEAD commit: 9b62e02e6336 Merge tag 'mm-hotfixes-stable-2024-05-25-09-1.. > > >> git tree: upstream > > >> console output: https://syzkaller.appspot.com/x/log.txt?x=16cb0eec980000 > > >> kernel config: https://syzkaller.appspot.com/x/.config?x=3e73beba72b96506 > > >> dashboard link: https://syzkaller.appspot.com/bug?extid=7f3bbe59e8dd2328a990 > > >> compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > > >> > > >> Unfortunately, I don't have any reproducer for this issue yet. > > >> > > >> Downloadable assets: > > >> disk image: https://storage.googleapis.com/syzbot-assets/61b507f6e56c/disk-9b62e02e.raw.xz > > >> vmlinux: https://storage.googleapis.com/syzbot-assets/6991f1313243/vmlinux-9b62e02e.xz > > >> kernel image: https://storage.googleapis.com/syzbot-assets/65f88b96d046/bzImage-9b62e02e.xz > > >> > > >> IMPORTANT: if you fix the issue, please add the following tag to the commit: > > >> Reported-by: syzbot+7f3bbe59e8dd2328a990@syzkaller.appspotmail.com > > > > > > #syz unset kvm > > > > The following labels did not exist: kvm > > Hrm, looks like there's no unset for a single subsytem, so: > > #syz set subsystems: net,virt Must be this patchset: https://lore.kernel.org/all/20240316004707.45557-1-michael.christie@oracle.com/ but I don't see anything obvious there to trigger it, and it's not reproducible yet... -- MST