[PATCH v3 11/11] drm: Replace strcpy() with __get_task_comm()

Yafang Shao
2024-06-21T02:32:50Z

To prevent erros from occurring when the src string is longer than the
dst string in strcpy(), we should use __get_task_comm() instead. This
approach also facilitates future extensions to the task comm.

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: David Airlie <airlied@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
---
drivers/gpu/drm/drm_framebuffer.c | 2 +-
drivers/gpu/drm/i915/i915_gpu_error.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c
index 888aadb6a4ac..25262b07ffaf 100644
--- a/drivers/gpu/drm/drm_framebuffer.c
+++ b/drivers/gpu/drm/drm_framebuffer.c
@@ -868,7 +868,7 @@ int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
INIT_LIST_HEAD(&fb->filp_head);

fb->funcs = funcs;
- strcpy(fb->comm, current->comm);
+ __get_task_comm(fb->comm, sizeof(fb->comm), current);

ret = __drm_mode_object_add(dev, &fb->base, DRM_MODE_OBJECT_FB,
false, drm_framebuffer_free);
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 625b3c024540..b2c16a53bd24 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1411,7 +1411,7 @@ static bool record_context(struct i915_gem_context_coredump *e,
rcu_read_lock();
task = pid_task(ctx->pid, PIDTYPE_PID);
if (task) {
- strcpy(e->comm, task->comm);
+ __get_task_comm(e->comm, sizeof(e->comm), task);
e->pid = task->pid;
}
rcu_read_unlock();
--
2.39.1