[Uclinux-h8-devel] [PATCH 3/6] [v2] hexagon: use generic strncpy/strnlen from_user

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Christoph Hellwig hch****@lst*****
2021年 5月 17日 (月) 15:16:35 JST


On Sat, May 15, 2021 at 12:18:00PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd****@arndb*****>
> 
> Most per-architecture versions of these functions are broken in some form,
> and they are almost certainly slower than the generic code as well.
> 
> Remove the ones for hexagon and instead use the generic version.
> This custom version reads the data twice for strncpy() by doing an extra
> strnlen(), and it apparently lacks a check for user_addr_max().

I'd be tempted to just remove the first paragraph and reword the second
as:

Remove the hexagon implementation of strncpy/strnlen and instead use the
generic versions.  The hexago version of strncpy reads the data twice by
doing an extra strnlen(), and it apparently lacks a check for
user_addr_max().



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