[Bug 200465] null ptr dereference in fscrypt_do_page_crypto() when operating a file on a corrupted f2fs image

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=200465

Chao Yu (chao@kernel.org) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |NEEDINFO

--- Comment #5 from Chao Yu (chao@kernel.org) ---
(In reply to Wen Xu from comment #4)
> (In reply to Chao Yu from comment #3)
> > Steve,
> > 
> > I figure out that patch to solve issue which I encounter with image
> attached
> > by Wen Xu, the bug can be triggered with below scripts:
> > - mount image /mnt/f2fs/
> > - cd /mnt/f2fs/foo/bar/
> > - ls -l
> > 
> > After applying that patch, the problem was gone.
> > 
> > But when the bug triggeres, related call stack is not the same as reported
> > one, also I can't reproduce reported call stack with the method provided
> > from Wen Xu.
> > 
> > I guess the right producing way is adding master key for encrypted file,
> I'd
> > like to confirm with Wen Xu.
> 
> Hi Chao,
> 
> Sorry for a late reply! Eh the first thing is that I never did anything like
> adding master key for encrypted file. Second, I feel I pasted wrong
> (mismatched) kernel message/PoC...but unfortunately I do not have a local
> copy on my laptop now.

Hi Wen,

Oops, if you got another similar kernel message, please let me know.

BTW, let me tag status of this issue as NEEDINFO

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