Re: [PATCH] checkpolicy: avoid passing NULL pointer to memset()

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On Mon, Aug 29, 2022 at 2:50 PM James Carter <jwcart2@xxxxxxxxx> wrote:
>
> On Mon, Aug 29, 2022 at 8:49 AM Juraj Marcin <juraj@xxxxxxxxxxxxxxx> wrote:
> >
> > Function `class_perm_node_init()` is called with `dest_perms` before it
> > is checked that its allocation succeeded. If the allocation fails, then
> > a NULL pointer is passed to `memset()` inside the
> > `class_perm_node_init()` function.
> >
> > Signed-off-by: Juraj Marcin <juraj@xxxxxxxxxxxxxxx>
>
> Acked-by: James Carter <jwcart2@xxxxxxxxx>
>

Merged.
Thanks,
Jim


> > ---
> >  checkpolicy/policy_define.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/checkpolicy/policy_define.c b/checkpolicy/policy_define.c
> > index f3b48870..54bb304b 100644
> > --- a/checkpolicy/policy_define.c
> > +++ b/checkpolicy/policy_define.c
> > @@ -2371,11 +2371,12 @@ static int avrule_cpy(avrule_t *dest, const avrule_t *src)
> >         src_perms = src->perms;
> >         while (src_perms) {
> >                 dest_perms = (class_perm_node_t *) calloc(1, sizeof(class_perm_node_t));
> > -               class_perm_node_init(dest_perms);
> >                 if (!dest_perms) {
> >                         yyerror("out of memory");
> >                         return -1;
> >                 }
> > +               class_perm_node_init(dest_perms);
> > +
> >                 if (!dest->perms)
> >                         dest->perms = dest_perms;
> >                 else
> > --
> > 2.37.1
> >



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