From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CD30AC433E1 for ; Sun, 16 Aug 2020 19:23:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A43F82067C for ; Sun, 16 Aug 2020 19:23:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="V8aN4aPG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729529AbgHPTXt (ORCPT ); Sun, 16 Aug 2020 15:23:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45630 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725873AbgHPTXq (ORCPT ); Sun, 16 Aug 2020 15:23:46 -0400 Received: from mail-wr1-x441.google.com (mail-wr1-x441.google.com [IPv6:2a00:1450:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 15D35C061786 for ; Sun, 16 Aug 2020 12:23:46 -0700 (PDT) Received: by mail-wr1-x441.google.com with SMTP id y3so12857384wrl.4 for ; Sun, 16 Aug 2020 12:23:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=EwFJZ7dfAqQ1UBhHBt6LFEw2dpyCC5fZ/uaODPbwQ/k=; b=V8aN4aPGz4W/rhy/Q2gJmxMbjDP4IRKELAm+TZMXVoa0g3IM5sKGSKxAL9WDkdzRdc uX5MQexjBo90N5mP/4jKoS5+JudjMkTKk3qNBvmKoOJ3808ZSsyL0gS0BM9pEUjkjpUa XWBxdX/ZyfepBIe5evz+gbIeF/ppVLyVFOizf3ffAoNVrVagVhIGSVrKp7GQHVy5VgUE jF84GKxPp5e/FBgozBO+6QPKig3WofCX9L+050rUp26G17L8UADyqFy/YVbyAGXzqy70 3w21mQc95ILOXaVw0ukA1NkVVTWtvzAQ6G57LYlI9XYpWjIJ0D59UFkCgvXPKuj6BBw3 BffQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=EwFJZ7dfAqQ1UBhHBt6LFEw2dpyCC5fZ/uaODPbwQ/k=; b=gGZ+qHNFA6wc7/X6jPFwDv9Ro+aIKW4sQUJuIgf93F1FTbqSbuNF+4LwZbDdPH6ToT 89eB6Cof9eJqkWsKstI377H3VF+RM/nBbNZfZYxB+PJQtDBacbwApPcpNB6qgkKM3WNF jnm9K6tntbR9v6sOlAP/Pm7+ST4spc0so/mjhVey7mEN9X4hMgn0qDOSECYoHMMnJHXx 3RfF+Kk5atdvcYytGhzLkgb7+3+/gS5EHhVt9K5iIYq5G3PSSRWxdUQg2t1tjaX6XsVi DFkbMChMXxgkNOUe+CQl7Mdy2FDmvmr/yG4+qGY0ji7O/USv3uNOCjL2MUwXRlGgeFuT hZrA== X-Gm-Message-State: AOAM532UlGqDqfK6vp5vxLvDmBzhaLLfYhJbYAnc/N2WtC5xcJp1PxIe TmULQcwzciYbUL/Z/LNr6H8= X-Google-Smtp-Source: ABdhPJzKVZZ6r6L7ot1ZZO9bdKj1FQQ/74Sm840x6qryXJBgWNNZtbnpDq+zS2ZuU1QSHa5zhMF0vg== X-Received: by 2002:a5d:4144:: with SMTP id c4mr11672695wrq.200.1597605824368; Sun, 16 Aug 2020 12:23:44 -0700 (PDT) Received: from tsnow ([94.159.146.190]) by smtp.gmail.com with ESMTPSA id p17sm30992902wra.81.2020.08.16.12.23.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 16 Aug 2020 12:23:43 -0700 (PDT) Date: Sun, 16 Aug 2020 22:23:25 +0300 From: Tomer Samara To: Greg Kroah-Hartman Cc: Arve =?iso-8859-1?B?SGr4bm5lduVn?= , Riley Andrews , Laura Abbott , Sumit Semwal , Todd Kjos , Martijn Coenen , Joel Fernandes , Christian Brauner , Hridya Valsaraju , Suren Baghdasaryan , devel@driverdev.osuosl.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/4] staging: android: Replace BUG_ON with WARN_ON Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org BUG_ON() is replaced with WARN_ON at ion_page_pool.c Fixes the following issue: Avoid crashing the kernel - try using WARN_ON & recovery code ratherthan BUG() or BUG_ON(). Signed-off-by: Tomer Samara --- drivers/staging/android/ion/ion_page_pool.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/staging/android/ion/ion_page_pool.c b/drivers/staging/android/ion/ion_page_pool.c index 0198b886d906..c1b9eda35c96 100644 --- a/drivers/staging/android/ion/ion_page_pool.c +++ b/drivers/staging/android/ion/ion_page_pool.c @@ -46,11 +46,13 @@ static struct page *ion_page_pool_remove(struct ion_page_pool *pool, bool high) struct page *page; if (high) { - BUG_ON(!pool->high_count); + if (WARN_ON(!pool->high_count)) + return NULL; page = list_first_entry(&pool->high_items, struct page, lru); pool->high_count--; } else { - BUG_ON(!pool->low_count); + if (WARN_ON(!pool->low_count)) + return NULL; page = list_first_entry(&pool->low_items, struct page, lru); pool->low_count--; } @@ -65,7 +67,8 @@ struct page *ion_page_pool_alloc(struct ion_page_pool *pool) { struct page *page = NULL; - BUG_ON(!pool); + if (WARN_ON(!pool)) + return NULL; mutex_lock(&pool->mutex); if (pool->high_count) @@ -82,7 +85,8 @@ struct page *ion_page_pool_alloc(struct ion_page_pool *pool) void ion_page_pool_free(struct ion_page_pool *pool, struct page *page) { - BUG_ON(pool->order != compound_order(page)); + if (WARN_ON(pool->order != compound_order(page))) + return; ion_page_pool_add(pool, page); } -- 2.25.1