From patchwork Fri Jun 21 02:29:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yafang Shao X-Patchwork-Id: 13706773 Received: from mail-pf1-f179.google.com (mail-pf1-f179.google.com [209.85.210.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9EF4F84A3B; Fri, 21 Jun 2024 02:32:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.179 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718937172; cv=none; b=JfUWyuh39EWSOs4uj2dh8hNgyonTX0HwwcAcIWS/liYt0/c/w0JI9sX/U5ViFjxkJejef0mllOEB3gtQvro0wLn3jdTlx7WfCCDC5sY5RrmgY2eKsn5yv9VSZoPR+e5wkxJZVV0ZmfEA6mMtBRsPSpOC8sI9ZYpPWug33kJQdsw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718937172; c=relaxed/simple; bh=TrtFPtQa1k97XzAC7EiU7HM1PNrmylMnQBNN3TI+v6A=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=D1Ht26nTHrabQanIqf50GICzGhA+/jagUnwptKO+jpElIn3/XzGRTPSb352ESzPwYIyLl9eQSyWRb+Qk+hNKRp3VV/TWucebhpJDNDe3aEIg1UjOZE6fEq1H6hApK+tXIoC8IHVtTzakAL5QCO7Q0S/eSVAt+XLStrNM2e/msKQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=AwMGlm/Q; arc=none smtp.client-ip=209.85.210.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="AwMGlm/Q" Received: by mail-pf1-f179.google.com with SMTP id d2e1a72fcca58-706354409e1so1413987b3a.2; Thu, 20 Jun 2024 19:32:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1718937170; x=1719541970; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ByPZqEdQZBBtzQ6Ut5Ro8SR1Vw4SYts83oZvgSR+UR8=; b=AwMGlm/QaSabm+eVByh6dNVRZnCGZIRYMA3RIkMITjLC7GOs7mMvCUR8Sggcb4oTnl T0lDbCJE7LWXeoIjhost5Gt+zbaU5PBeBsXnFimIdQasoJHbIKGnOElO4obmW+zvEdlB jpae5l1gz2xVxL2E3SSS03ubCygdmCf+rrelZydI7RP5CroVPSIa7wZvy8izH6QJNZ4M bV2keBigldkjYs67RBZB7SXVYqgUngL6+gRob4i/i84omfeHlSt80DRJwKWJ4gLX+9xR uSckTWFvIgtnaoK6WB3Kk3qt5SrqacFJXby2nyuu8ZZjUXqjGVLDnofolpu5rXWJ80SY CbMg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718937170; x=1719541970; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ByPZqEdQZBBtzQ6Ut5Ro8SR1Vw4SYts83oZvgSR+UR8=; b=Gn8ABcPjsNFf+usy2XO/qTVV8Y6KrVPcc1s8ku8AhRMvMMGbN9PTgshUZ6YlciOKUe pv0ArKjS1f8Z5p29UEQJptVlTp+iCxjJ0nVBahAWHGthG+ULd43pJ1Ou6HGDSTFf/OFZ T/AtZ4cMO5ef3+TYz0CGO5PIQ9I01rZZEcuJp1gFoArkbM5wjUS37aeNHhBfY17YGl0J PbN/qEb6zYKdxAmWnUFLQOzcEmPGc4ensX/roSbVPSxfnyglzZZ31gB3W4aMc89iUJbK muVRMK/sy6iCvHVJShT+Uj99XUfox7t4upwALMjp/44hNBSj532s6DO7d5QwpwAQDWpS /Pfg== X-Forwarded-Encrypted: i=1; AJvYcCXUUX8c8aBsXY0RmBQijfrHl5m68VII6PU3yLiNXV6FhqTBx30uYvsI2lenhhfYkEo0/2LX97/WsOrrydh71x0zV/e/LjbLcxajWlxMI6Htdsg699KDD3gFnv+UPQhonVIeBHq0GvV3/Wzhwk+6ZxjUVxhWiag2/e6m1bs2KvjrKpzGgvIf1Nk3//hmPd6nEiNzTpfnjqCoKXYwpEiIBztkxyhVM7YTDWF+MaQEurT20C2MqYSSz67341PyzkF8dMkUwo34UFCQ4ufZXiQkYQlIiDvhIYP9kMsIKSOjuO1vp0v/wAzFSTgtZIvcVz9zi0B2FLhG/A== X-Gm-Message-State: AOJu0YyNz3YDYyL++Vdubaj4CY0qVi/vw2Gsz2j6Xnq6SS8kBuX/gfpB tAy2bhFXBhYrJuDri05Rtyv+WOFSxmjzJEv5GSfwD9tgKliOfdxq X-Google-Smtp-Source: AGHT+IHwLzKazOZk9J+TnuaENF2GrO7T5JApXVTdzZDurk6fW60Sg+sw/brS6M3qBlKISuVvI9yc+A== X-Received: by 2002:a05:6a00:4d91:b0:6e7:20a7:9fc0 with SMTP id d2e1a72fcca58-70629d0d58cmr6849890b3a.34.1718937169948; Thu, 20 Jun 2024 19:32:49 -0700 (PDT) Received: from localhost.localdomain ([39.144.105.24]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-706511944d2sm332488b3a.70.2024.06.20.19.32.38 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 20 Jun 2024 19:32:49 -0700 (PDT) From: Yafang Shao To: torvalds@linux-foundation.org Cc: ebiederm@xmission.com, alexei.starovoitov@gmail.com, rostedt@goodmis.org, catalin.marinas@arm.com, akpm@linux-foundation.org, penguin-kernel@i-love.sakura.ne.jp, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, audit@vger.kernel.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org, bpf@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Yafang Shao , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter Subject: [PATCH v3 11/11] drm: Replace strcpy() with __get_task_comm() Date: Fri, 21 Jun 2024 10:29:59 +0800 Message-Id: <20240621022959.9124-12-laoar.shao@gmail.com> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20240621022959.9124-1-laoar.shao@gmail.com> References: <20240621022959.9124-1-laoar.shao@gmail.com> Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Daniel Vetter Acked-by: Daniel Vetter --- 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();