Re: [PATCH] mm: debug: Fix a width vs precision bug in printk

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On Fri, Nov 23, 2018 at 10:01:25AM +0100, Michal Hocko wrote:
> On Fri 23-11-18 10:21:35, Dan Carpenter wrote:
> > We had intended to only print dentry->d_name.len characters but there is
> > a width vs precision typo so if the name isn't NUL terminated it will
> > read past the end of the buffer.
> 
> OK, it took me quite some time to grasp what you mean here. The code
> works as expected because d_name.len and dname.name are in sync so there
> no spacing going to happen. Anyway what you propose is formally more
> correct I guess.
>  

Yeah.  If we are sure that the name has a NUL terminator then this
change has no effect.

regards,
dan carpenter




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