* [PATCH] drm/ttm: make sure format string cannot leak in
@ 2014-09-11 20:53 Kees Cook
2014-09-12 8:28 ` David Herrmann
0 siblings, 1 reply; 3+ messages in thread
From: Kees Cook @ 2014-09-11 20:53 UTC (permalink / raw)
To: linux-kernel; +Cc: David Airlie, dri-devel
While zone->name is currently hard coded, the call to kobject_init_and_add()
should follow the more defensive argument list usage (as already done in
other places in ttm_memory.c) where "%s" is used instead of directly passing
in a variable as a format string.
Signed-off-by: Kees Cook <keescook@chromium.org>
---
drivers/gpu/drm/ttm/ttm_memory.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/ttm/ttm_memory.c b/drivers/gpu/drm/ttm/ttm_memory.c
index fa53df487875..1e688b603e46 100644
--- a/drivers/gpu/drm/ttm/ttm_memory.c
+++ b/drivers/gpu/drm/ttm/ttm_memory.c
@@ -300,7 +300,8 @@ static int ttm_mem_init_highmem_zone(struct ttm_mem_global *glob,
zone->glob = glob;
glob->zone_highmem = zone;
ret = kobject_init_and_add(
- &zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, zone->name);
+ &zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, "%s",
+ zone->name);
if (unlikely(ret != 0)) {
kobject_put(&zone->kobj);
return ret;
--
1.9.1
--
Kees Cook
Chrome OS Security
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] drm/ttm: make sure format string cannot leak in
2014-09-11 20:53 [PATCH] drm/ttm: make sure format string cannot leak in Kees Cook
@ 2014-09-12 8:28 ` David Herrmann
0 siblings, 0 replies; 3+ messages in thread
From: David Herrmann @ 2014-09-12 8:28 UTC (permalink / raw)
To: Kees Cook; +Cc: linux-kernel, David Airlie, dri-devel
Hi
On Thu, Sep 11, 2014 at 10:53 PM, Kees Cook <keescook@chromium.org> wrote:
> While zone->name is currently hard coded, the call to kobject_init_and_add()
> should follow the more defensive argument list usage (as already done in
> other places in ttm_memory.c) where "%s" is used instead of directly passing
> in a variable as a format string.
>
> Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Thanks
David
> ---
> drivers/gpu/drm/ttm/ttm_memory.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_memory.c b/drivers/gpu/drm/ttm/ttm_memory.c
> index fa53df487875..1e688b603e46 100644
> --- a/drivers/gpu/drm/ttm/ttm_memory.c
> +++ b/drivers/gpu/drm/ttm/ttm_memory.c
> @@ -300,7 +300,8 @@ static int ttm_mem_init_highmem_zone(struct ttm_mem_global *glob,
> zone->glob = glob;
> glob->zone_highmem = zone;
> ret = kobject_init_and_add(
> - &zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, zone->name);
> + &zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, "%s",
> + zone->name);
> if (unlikely(ret != 0)) {
> kobject_put(&zone->kobj);
> return ret;
> --
> 1.9.1
>
>
> --
> Kees Cook
> Chrome OS Security
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] drm/ttm: make sure format string cannot leak in
@ 2014-09-12 8:28 ` David Herrmann
0 siblings, 0 replies; 3+ messages in thread
From: David Herrmann @ 2014-09-12 8:28 UTC (permalink / raw)
To: Kees Cook; +Cc: linux-kernel, dri-devel
Hi
On Thu, Sep 11, 2014 at 10:53 PM, Kees Cook <keescook@chromium.org> wrote:
> While zone->name is currently hard coded, the call to kobject_init_and_add()
> should follow the more defensive argument list usage (as already done in
> other places in ttm_memory.c) where "%s" is used instead of directly passing
> in a variable as a format string.
>
> Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Thanks
David
> ---
> drivers/gpu/drm/ttm/ttm_memory.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_memory.c b/drivers/gpu/drm/ttm/ttm_memory.c
> index fa53df487875..1e688b603e46 100644
> --- a/drivers/gpu/drm/ttm/ttm_memory.c
> +++ b/drivers/gpu/drm/ttm/ttm_memory.c
> @@ -300,7 +300,8 @@ static int ttm_mem_init_highmem_zone(struct ttm_mem_global *glob,
> zone->glob = glob;
> glob->zone_highmem = zone;
> ret = kobject_init_and_add(
> - &zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, zone->name);
> + &zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, "%s",
> + zone->name);
> if (unlikely(ret != 0)) {
> kobject_put(&zone->kobj);
> return ret;
> --
> 1.9.1
>
>
> --
> Kees Cook
> Chrome OS Security
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
^ permalink raw reply [flat|nested] 3+ messages in thread
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