linux-next: manual merge of the mm-stable tree with the kspp tree

linux-next: manual merge of the mm-stable tree with the kspp tree

[Stephen Rothwell]

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Hi all,

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.

-- 
Cheers,
Stephen Rothwell

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,

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Re: linux-next: manual merge of the mm-stable tree with the kspp tree

[Stephen Rothwell]

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Hi all,

On Tue, 4 Oct 2022 20:40:25 +1100 Stephen Rothwell <sfr@canb.auug.org.au> 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.
> 
> 
> 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.

-- 
Cheers,
Stephen Rothwell

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Re: linux-next: manual merge of the mm-stable tree with the kspp tree

[Alexander Potapenko]

On Wed, Oct 5, 2022 at 8:39 AM Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
> Hi all,
>
> On Tue, 4 Oct 2022 20:40:25 +1100 Stephen Rothwell <sfr@canb.auug.org.au> 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



-- 
Alexander Potapenko
Software Engineer

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