[syzbot] riscv/fixes boot error: can't ssh into the instance (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 8dc2a7e8027f riscv: Fix relocatable kernels with early alt..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes
console output: https://syzkaller.appspot.com/x/log.txt?x=17e9fbcd280000
kernel config: https://syzkaller.appspot.com/x/.config?x=6b4bf01bbb07f945
dashboard link: https://syzkaller.appspot.com/bug?extid=a74d57bddabbedd75135
compiler: riscv64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: riscv64

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/a741b348759c/non_bootable_disk-8dc2a7e8.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/822e3cbe29ad/vmlinux-8dc2a7e8.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7bda24abf1c2/Image-8dc2a7e8.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a74d57...@syzkaller.appspotmail.com



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[Alexandre Ghiti]

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I'm looking into those failures.

[Alexandre Ghiti]

So KFENCE was broken by commit 3335068f8721 ("riscv: Use PUD/P4D/PGD
pages for the linear mapping") since our kfence implementation only
breaks pmd hugepages. Let me fix that for 6.4.