Re: [PATCH 3/5] xfs_io: init count to stop loop from execution

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On 2024-04-16 09:15:30, Darrick J. Wong wrote:
> On Tue, Apr 16, 2024 at 02:34:25PM +0200, Andrey Albershteyn wrote:
> > jdm_parentpaths() doesn't initialize count. If count happens to be
> > non-zero, following loop can result in access overflow.
> > 
> > Signed-off-by: Andrey Albershteyn <aalbersh@xxxxxxxxxx>
> > ---
> >  io/parent.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/io/parent.c b/io/parent.c
> > index 8f63607ffec2..5750d98a3b75 100644
> > --- a/io/parent.c
> > +++ b/io/parent.c
> > @@ -112,7 +112,7 @@ check_parents(parent_t *parentbuf, size_t *parentbuf_size,
> 
> check_parents is an artifact of the old sgi parent pointers code and
> (apparently) its need to check parent pointer correctness via xfs_io
> commands.  The Linux parent pointers patchset fixed all those
> referential integrity problems (thanks, Allison!) and will blow this
> away, so I think we should ignore this report:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfsprogs-dev.git/commit/io/parent.c?h=pptrs&id=c0854b85c1e8c90ea3eea930a20d1323e61ddb40

I see, thanks, will drop this one

> 
> --D
> 
> >  	     jdm_fshandle_t *fshandlep, struct xfs_bstat *statp)
> >  {
> >  	int error, i;
> > -	__u32 count;
> > +	__u32 count = 0;
> >  	parent_t *entryp;
> >  
> >  	do {
> > -- 
> > 2.42.0
> > 
> > 
> 

-- 
- Andrey





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