[Linux-kernel-mentees] [PATCH] fs: fix KMSAN uninit-value bug by initializing nd in do_file_open_root
anant.thazhemadam at gmail.com
Sun Oct 4 15:25:29 UTC 2020
On 20-09-2020 01:47, Anant Thazhemadam wrote:
> On 19-09-2020 17:03, Anant Thazhemadam wrote:
>> On 19-09-2020 22:25, Al Viro wrote:
>>> On Sat, Sep 19, 2020 at 05:17:27PM +0100, Al Viro wrote:
>>>> Lovely... That would get an empty path and non-directory for a starting
>>>> point, but it should end up with LAST_ROOT in nd->last_type. Which should
>>>> not be able to reach the readers of those fields... Which kernel had
>>>> that been on?
>>> Yecchhh... I see what's going on; I suspect that this ought to be enough.
>>> Folks, could somebody test it on the original reproducer setup?
>> Sure. I can do that.
> Looks like this patch actually fixes this bug.
> I made syzbot test the patch, and no issues were triggered!
> Note: syzbot tested the patch with the KMSAN kernel, which
> was recently rebased on v5.9-rc4.
Has the patch that was tested been applied to any tree yet?
If yes, could someone please let me know the commit details, so we can close
the issue? (Unfortunately, I was unable to find it. :( )
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