Re: [PATCH] asm-generic: fix buffer overflow read in __strncpy_from_user

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On Mon, Jun 27, 2022 at 12:19:18PM +0200, Arnd Bergmann wrote:
> On Mon, Jun 27, 2022 at 11:38 AM Yangxi Xiang <xyangxi5@xxxxxxxxx> wrote:
> >
> > > Which architectures do you mean? I don't see any architecture using
> > > asm-generic/uaccess.h without setting GENERIC_STRNCPY_FROM_USER
> > > before commit 98b861a30431 or the prior release.
> >
> > I am a user of LibOS, which uses this __strncpy_from_user.
> 
> Ok, got it. This should be part of the changelog then when you send a
> patch for stable  kernels. You should also indicate that the code was
> removed in mainline kernels and what the fix was there, as well as
> which of the older kernels need the fix.

But libos isn't part of the kernel tree, that's an out-of-tree change
that we can't control here, right?  How is that relevant for stable
kernels and why can't it just be added to the libos patchset?

thanks,

greg k-h



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