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

[Alexandre Ghiti]

On 02/06/2023 09:58, Alexandre Ghiti wrote:
>
> On 01/06/2023 18:04, syzbot wrote:
>> 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+a74d57bddabbedd75135 at syzkaller.appspotmail.com
>>
>>
>>
>> ---
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>>
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>>
>> If the bug is already fixed, let syzbot know by replying with:
>> #syz fix: exact-commit-title
>>
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>>
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>>
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>
>
> I'm looking into those failures.


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.


>
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