Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751634AbaDAIBa (ORCPT ); Tue, 1 Apr 2014 04:01:30 -0400 Received: from smtp.codeaurora.org ([198.145.11.231]:56015 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751061AbaDAIB2 (ORCPT ); Tue, 1 Apr 2014 04:01:28 -0400 From: Tanya Brokhman To: dedekind1@gmail.com Cc: linux-mtd@lists.infradead.org, Tanya Brokhman , linux-kernel@vger.kernel.org (open list) Subject: [RFC/PATCH] mtd: ubi: Test return value of __wl_get_peb Date: Tue, 1 Apr 2014 11:01:12 +0300 Message-Id: <1396339273-15904-1-git-send-email-tlinder@codeaurora.org> X-Mailer: git-send-email 1.7.6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In case of an error (if there are not free PEB's for example), __wl_get_peb will return a negative value. In order to prevent access violation we need to test the returned value prior to using it later on. Signed-off-by: Tatyana Brokhman diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c index 02317c1..457ead3 100644 --- a/drivers/mtd/ubi/wl.c +++ b/drivers/mtd/ubi/wl.c @@ -684,6 +684,9 @@ int ubi_wl_get_peb(struct ubi_device *ubi) peb = __wl_get_peb(ubi); spin_unlock(&ubi->wl_lock); + if (peb < 0) + return peb; + err = ubi_self_check_all_ff(ubi, peb, ubi->vid_hdr_aloffset, ubi->peb_size - ubi->vid_hdr_aloffset); if (err) { -- 1.7.6 -- QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/