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Subject: Re: [PATCH v3 0/2] Let illegal access to user-space memory die
To:     Palmer Dabbelt <palmer@dabbelt.com>, tesheng@andestech.com
Cc:     aou@eecs.berkeley.edu, linux-kernel@vger.kernel.org,
        peterx@redhat.com, penberg@kernel.org,
        Paul Walmsley <paul.walmsley@sifive.com>,
        akpm@linux-foundation.org, walken@google.com,
        linux-riscv@lists.infradead.org, vbabka@suse.cz
References: <mhng-607cbd62-adc5-45a7-adde-476741f9d63b@palmerdabbelt-glaptop>
From:   Ben Dooks <ben.dooks@codethink.co.uk>
Organization: Codethink Limited.
Message-ID: <ee1f254d-a06e-9725-57d1-ce0210751c05@codethink.co.uk>
Date:   Mon, 1 Feb 2021 13:18:36 +0000
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On 22/12/2020 02:35, Palmer Dabbelt wrote:
> On Thu, 03 Dec 2020 21:42:57 PST (-0800), tesheng@andestech.com wrote:
>> Accesses to user-space memory without calling uaccess routine
>> leads to hanging in page fault handler. Like arm64, we let it
>> die earlier in page fault handler.
>>
>> Changes in v3:
>>     -Let no_context() use die_kernel_fault() helper
>>
>> Changes in v2:
>>     -Add a die_kernel_fault() helper
>>     -Split one long line code into two
>>
>> Eric Lin (2):
>>   riscv/mm: Introduce a die_kernel_fault() helper function
>>   riscv/mm: Prevent kernel module to access user memory without uaccess
>>     routines
>>
>>  arch/riscv/mm/fault.c | 28 ++++++++++++++++++++++------
>>  1 file changed, 22 insertions(+), 6 deletions(-)
> 
> Thanks, these will be on for-next when the merge window ends.

Just tested this and it seems to be working.

-- 
Ben Dooks				http://www.codethink.co.uk/
Senior Engineer				Codethink - Providing Genius

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