Re: [PATCH v3 09/19] unwind: Introduce sframe user space unwinding

[Josh Poimboeuf]

On Wed, Nov 13, 2024 at 03:50:40PM -0500, Steven Rostedt wrote:
> On Thu, 7 Nov 2024 17:59:08 +0100
> Jens Remus <jremus@xxxxxxxxxxxxx> wrote:
> 
> > On 28.10.2024 22:47, Josh Poimboeuf wrote:
> > ...
> > > diff --git a/kernel/unwind/sframe.c b/kernel/unwind/sframe.c  
> > ...
> > > +static int find_fde(struct sframe_section *sec, unsigned long ip,
> > > +		    struct sframe_fde *fde)
> > > +{
> > > +	struct sframe_fde __user *first, *last, *found = NULL;
> > > +	u32 ip_off, func_off_low = 0, func_off_high = -1;
> > > +
> > > +	ip_off = ip - sec->sframe_addr;
> > > +
> > > +	first = (void __user *)sec->fdes_addr;
> > > +	last = first + sec->fdes_nr;  
> > 
> > Could it be that this needs to be:
> > 
> > 	last = first + sec->fdes_nr - 1;
> 
> Yep, I discovered the same issue.

Indeed, thanks.

-- 
Josh