Re: [BUG] from x86: Support kmap_local() forced debugging

[Steven Rostedt]

On Wed, 6 Jan 2021 17:03:48 -0800
Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:

> --- a/include/linux/skbuff.h
> +++ b/include/linux/skbuff.h
> @@ -366,7 +366,7 @@ static inline void skb_frag_size_sub(skb_frag_t *frag, int delta)
>  static inline bool skb_frag_must_loop(struct page *p)
>  {
>  #if defined(CONFIG_HIGHMEM)
> -	if (PageHighMem(p))
> +	if (IS_ENABLED(CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP) || PageHighMem(p))
>  		return true;
>  #endif
>  	return false;

I applied this and I haven't been able to crash it again.

Thanks,

-- Steve