* [PATCH] drm/atomic: fix memory leak when fetching format name
@ 2016-11-11 16:26 Colin King
2016-11-11 17:17 ` Eric Engestrom
0 siblings, 1 reply; 3+ messages in thread
From: Colin King @ 2016-11-11 16:26 UTC (permalink / raw)
To: David Airlie, dri-devel; +Cc: linux-kernel
From: Colin Ian King <colin.king@canonical.com>
drm_get_format_name allocates memory that is not currently free'd
when printing the state. Fix this by kfree'ing the memory after
use.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/gpu/drm/drm_atomic.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index f5ea7db..1d5e86a 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -917,9 +917,10 @@ static void drm_atomic_plane_print_state(struct drm_printer *p,
if (state->fb) {
struct drm_framebuffer *fb = state->fb;
int i, n = drm_format_num_planes(fb->pixel_format);
+ char *format_name = drm_get_format_name(fb->pixel_format);
- drm_printf(p, "\t\tformat=%s\n",
- drm_get_format_name(fb->pixel_format));
+ drm_printf(p, "\t\tformat=%s\n", format_name);
+ kfree(format_name);
drm_printf(p, "\t\tsize=%dx%d\n", fb->width, fb->height);
drm_printf(p, "\t\tlayers:\n");
for (i = 0; i < n; i++) {
--
2.10.2
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] drm/atomic: fix memory leak when fetching format name
2016-11-11 16:26 [PATCH] drm/atomic: fix memory leak when fetching format name Colin King
@ 2016-11-11 17:17 ` Eric Engestrom
0 siblings, 0 replies; 3+ messages in thread
From: Eric Engestrom @ 2016-11-11 17:17 UTC (permalink / raw)
To: Colin King; +Cc: linux-kernel, dri-devel
On Friday, 2016-11-11 16:26:22 +0000, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> drm_get_format_name allocates memory that is not currently free'd
> when printing the state. Fix this by kfree'ing the memory after
> use.
You are correct, but there are more cases of this, and another fix
has been chosen. See this patch [1] for the fix and the rest of that
thread [2] for the discussion.
I'll send v4 (rebase and a missed `const`) as soon as I have the time,
but the usage will remain the same as in v3.
Cheers,
Eric
[1] https://lists.freedesktop.org/archives/dri-devel/2016-November/123250.html
[2] https://lists.freedesktop.org/archives/dri-devel/2016-November/thread.html#122845
>
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> drivers/gpu/drm/drm_atomic.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index f5ea7db..1d5e86a 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -917,9 +917,10 @@ static void drm_atomic_plane_print_state(struct drm_printer *p,
> if (state->fb) {
> struct drm_framebuffer *fb = state->fb;
> int i, n = drm_format_num_planes(fb->pixel_format);
> + char *format_name = drm_get_format_name(fb->pixel_format);
>
> - drm_printf(p, "\t\tformat=%s\n",
> - drm_get_format_name(fb->pixel_format));
> + drm_printf(p, "\t\tformat=%s\n", format_name);
> + kfree(format_name);
> drm_printf(p, "\t\tsize=%dx%d\n", fb->width, fb->height);
> drm_printf(p, "\t\tlayers:\n");
> for (i = 0; i < n; i++) {
> --
> 2.10.2
>
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] drm/atomic: fix memory leak when fetching format name
@ 2016-11-11 17:17 ` Eric Engestrom
0 siblings, 0 replies; 3+ messages in thread
From: Eric Engestrom @ 2016-11-11 17:17 UTC (permalink / raw)
To: Colin King; +Cc: David Airlie, dri-devel, linux-kernel
On Friday, 2016-11-11 16:26:22 +0000, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> drm_get_format_name allocates memory that is not currently free'd
> when printing the state. Fix this by kfree'ing the memory after
> use.
You are correct, but there are more cases of this, and another fix
has been chosen. See this patch [1] for the fix and the rest of that
thread [2] for the discussion.
I'll send v4 (rebase and a missed `const`) as soon as I have the time,
but the usage will remain the same as in v3.
Cheers,
Eric
[1] https://lists.freedesktop.org/archives/dri-devel/2016-November/123250.html
[2] https://lists.freedesktop.org/archives/dri-devel/2016-November/thread.html#122845
>
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> drivers/gpu/drm/drm_atomic.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index f5ea7db..1d5e86a 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -917,9 +917,10 @@ static void drm_atomic_plane_print_state(struct drm_printer *p,
> if (state->fb) {
> struct drm_framebuffer *fb = state->fb;
> int i, n = drm_format_num_planes(fb->pixel_format);
> + char *format_name = drm_get_format_name(fb->pixel_format);
>
> - drm_printf(p, "\t\tformat=%s\n",
> - drm_get_format_name(fb->pixel_format));
> + drm_printf(p, "\t\tformat=%s\n", format_name);
> + kfree(format_name);
> drm_printf(p, "\t\tsize=%dx%d\n", fb->width, fb->height);
> drm_printf(p, "\t\tlayers:\n");
> for (i = 0; i < n; i++) {
> --
> 2.10.2
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2016-11-11 16:26 [PATCH] drm/atomic: fix memory leak when fetching format name Colin King
2016-11-11 17:17 ` Eric Engestrom
2016-11-11 17:17 ` Eric Engestrom
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