On Wed, Oct 5, 2022 at 8:39 AM Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> Hi all,
>
> On Tue, 4 Oct 2022 20:40:25 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
> >
> > Today's linux-next merge of the mm-stable tree got a conflict in:
> >
> > include/linux/fortify-string.h
> >
> > between commit:
> >
> > 9f7d69c5cd23 ("fortify: Convert to struct vs member helpers")
> >
> > from the kspp tree and commit:
> >
> > ff901d80fff6 ("x86: kmsan: use __msan_ string functions where possible.")
> >
> > from the mm-stable tree.
> >
> > I fixed it up (see below) and can carry the fix as necessary. This
> > is now fixed as far as linux-next is concerned, but any non trivial
> > conflicts should be mentioned to your upstream maintainer when your tree
> > is submitted for merging. You may also want to consider cooperating
> > with the maintainer of the conflicting tree to minimise any particularly
> > complex conflicts.
Looks good, thanks for handling this!
> >
> > diff --cc include/linux/fortify-string.h
> > index b62c90cfafaf,6c8a1a29d0b6..000000000000
> > --- a/include/linux/fortify-string.h
> > +++ b/include/linux/fortify-string.h
> > @@@ -325,11 -282,13 +325,13 @@@ __FORTIFY_INLINE void fortify_memset_ch
> > })
> >
> > /*
> > - * __builtin_object_size() must be captured here to avoid evaluating argument
> > - * side-effects further into the macro layers.
> > + * __struct_size() vs __member_size() must be captured here to avoid
> > + * evaluating argument side-effects further into the macro layers.
> > */
> > + #ifndef CONFIG_KMSAN
> > #define memset(p, c, s) __fortify_memset_chk(p, c, s, \
> > - __builtin_object_size(p, 0), __builtin_object_size(p, 1))
> > + __struct_size(p), __member_size(p))
> > + #endif
> >
> > /*
> > * To make sure the compiler can enforce protection against buffer overflows,
>
> This is now a conflict between the mm-stable tree and Linus' tree.
Anything else we need to do specifically for Linus' tree?
> --
> Cheers,
> Stephen Rothwell
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