> You guys said you have a reproducer, right? Can you please share > details (I know it's somewhere on another thread, but let's put all > this in this thread). For reference, the original syzbot report is here along with links to artifacts. Link: https://lore.kernel.org/bpf/67121037.050a0220.10f4f4.000f.GAE@xxxxxxxxxx/ syz repro: https://syzkaller.appspot.com/x/repro.syz?x=153ef887980000 disk image: https://storage.googleapis.com/syzbot-assets/cf2ad43c81cc/disk-15e7d45e.raw.xz The steps I performed to reproduce locally are roughly as follows: 1. Copy the syz repro script to a file, repro.syz.txt 2. Download the disk image, disk.img 3. Build syzkaller (https://github.com/google/syzkaller) 4. Start up QEMU using disk.img: qemu-system-x86_64 -m 2G -smp 2,sockets=2,cores=1 -drive file=./disk.raw,format=raw -net nic,model=e1000 -net user,host=10.0.2.10,hostfwd:tcp::10022-:22 -enable-kvm -nographic 5. SCP syzkaller/bin/linux_amd64/syz-execprog and syzkaller/bin/linux_amd64/syz-executor to root@127.0.0.1:/root/ 6. SCP repro.syz.txt to root@127.0.0.1:/root/ 7. Run './syz-execprog -repeat=0 -procs=5 ./repro.syz.txt' over SSH on root@127.0.0.1 This typically crashes things within 20 seconds or so on my machine. -Jordan
