Hello, I am considering setting up a syzbot instance for riscv arch (using qemu emulation) and testing kernel config/image/etc. I can boot defconfig+kvmconfig riscv kernel, but so far I can't get a booting CONFIG_KASAN+CONFIG+KCOV kernel.
But first of all I would like to ask if the riscv port is stable enough at this point and if there is interest in continuous fuzzing and receiving bugs? If there is no interest, then the rest is not worth spending time on. Second, what git tree/branch should be used for testing (to find bugs sooner and get fixes faster)? Currently it seems that riscv/fixes is the most up-to-date branch with most fixes, is it the right one? Re non-booting kernel problem. If I do: defconfig+kvm_guest.config+ scripts/config -e KASAN -e KASAN_INLINE I only see OpenSBI banner and then nothing happens (qemu consumes 100% CPU). I've tried on v5.10, current upstream head (71c5f03154ac) and riscv/fixes (20620d72c31e). The result is the same. I see this recent patch from Nylon: https://lore.kernel.org/linux-riscv/1606727599-8598-1-git-send-email-nyl...@andestech.com/ which suggests that KASAN is working for Nylon. I am using qemu 5.1.0 as: qemu-system-riscv64 \ -machine virt -bios default -smp 1 -m 2G \ -device virtio-blk-device,drive=hd0 \ -drive file=buildroot-riscv64.ext4,if=none,format=raw,id=hd0 \ -kernel arch/riscv/boot/Image \ -nographic \ -device virtio-rng-device,rng=rng0 -object rng-random,filename=/dev/urandom,id=rng0 \ -netdev user,id=net0,host=10.0.2.10,hostfwd=tcp::10022-:22 -device virtio-net-device,netdev=net0 \ -append "root=/dev/vda earlyprintk=serial console=ttyS0 oops=panic panic_on_warn=1 panic=86400" I've also tried this config (slightly larger than defconfig, but does NOT include KASAN nor KCOV): https://gist.githubusercontent.com/dvyukov/b2b62beccf80493781ab03b41430e616/raw/62e673cff08a8a41656d2871b8a37f74b00f509f/gistfile1.txt and this is the ultimate large config that I would like to use: https://gist.githubusercontent.com/dvyukov/2b4e621d5252dbc5a2f28802b8d71d95/raw/3ef2b8d8eda60d3acfc4bf7916ffb9e77671ed76/gistfile1.txt Both of them hang after the OpenSBI banner in the same way. Is it a known issue? Am I doing something wrong? TIA
