netdev - [PATCH v4 11/11] drm: Replace strcpy() with __get_task

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Message-Id: <20240628090517.17994-11-laoar.shao@gmail.com>
Date: Fri, 28 Jun 2024 17:05:17 +0800
From: Yafang Shao <laoar.shao@...il.com>
To: torvalds@...ux-foundation.org,
	laoar.shao@...il.com
Cc: akpm@...ux-foundation.org,
	alexei.starovoitov@...il.com,
	audit@...r.kernel.org,
	bpf@...r.kernel.org,
	catalin.marinas@....com,
	dri-devel@...ts.freedesktop.org,
	ebiederm@...ssion.com,
	linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org,
	linux-security-module@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	penguin-kernel@...ove.sakura.ne.jp,
	rostedt@...dmis.org,
	selinux@...r.kernel.org,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>
Subject: [PATCH v4 11/11] drm: Replace strcpy() with __get_task_comm()

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@...il.com>
Acked-by: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Cc: Maxime Ripard <mripard@...nel.org>
Cc: Thomas Zimmermann <tzimmermann@...e.de>
Cc: David Airlie <airlied@...il.com>
---
 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();
-- 
2.43.5