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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B1569C4332F for ; Sat, 17 Dec 2022 15:40:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231484AbiLQPkw (ORCPT ); Sat, 17 Dec 2022 10:40:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49598 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231321AbiLQPjr (ORCPT ); Sat, 17 Dec 2022 10:39:47 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B5485FD28; Sat, 17 Dec 2022 07:30:52 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 5B7E360C16; Sat, 17 Dec 2022 15:30:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 04457C433D2; Sat, 17 Dec 2022 15:30:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1671291043; bh=y+kmgpEiykvKKnDemjnarN7AvnnMPA0u9a6lbU9fUVU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PZfasNxAH19clQwmspfHc0RQX4Gqbc2ttYaigdT/56euZBSBhyK6Vxy29uj0FLIBZ s6yTriSFIZUShexsSHAJRncoHDwMuHjIC08eSJzBb+ShbLcos6gGqN3H41vk32FsPU cNRQIgp6C/AIpLPKNylR3AaAoaUpMd5M+Tt9luTYTxUA+0IEd1Uxq2BvzlAl4ktS+D 9HCpTf/1Sc2WGj8MpcU4xHLhLOdUkH5hz+MPOSHF3ctcDehtJu4X9awsKqaOK4z7Hl 3+bcdcYDLRQXB7SnhoFIJ1fvlyN2d+a9vzy2A6CQs+1WvueqCl2K76BD/2gGUja9Fb 9dhYkHwXIfNaw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jianglei Nie , Baoquan He , Benjamin Herrenschmidt , Chen Lifu , "Eric W . Biederman" , Li Chen , Michael Ellerman , Paul Mackerras , Petr Mladek , Russell King , ye xingchen , Zeal Robot , Andrew Morton , Sasha Levin , kexec@lists.infradead.org, linux-fsdevel@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 5/8] proc/vmcore: fix potential memory leak in vmcore_init() Date: Sat, 17 Dec 2022 10:30:28 -0500 Message-Id: <20221217153033.99394-5-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221217153033.99394-1-sashal@kernel.org> References: <20221217153033.99394-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jianglei Nie [ Upstream commit 12b9d301ff73122aebd78548fa4c04ca69ed78fe ] Patch series "Some minor cleanup patches resent". The first three patches trivial clean up patches. And for the patch "kexec: replace crash_mem_range with range", I got a ibm-p9wr ppc64le system to test, it works well. This patch (of 4): elfcorehdr_alloc() allocates a memory chunk for elfcorehdr_addr with kzalloc(). If is_vmcore_usable() returns false, elfcorehdr_addr is a predefined value. If parse_crash_elf_headers() gets some error and returns a negetive value, the elfcorehdr_addr should be released with elfcorehdr_free(). Fix it by calling elfcorehdr_free() when parse_crash_elf_headers() fails. Link: https://lkml.kernel.org/r/20220929042936.22012-1-bhe@redhat.com Link: https://lkml.kernel.org/r/20220929042936.22012-2-bhe@redhat.com Signed-off-by: Jianglei Nie Signed-off-by: Baoquan He Acked-by: Baoquan He Cc: Benjamin Herrenschmidt Cc: Chen Lifu Cc: "Eric W . Biederman" Cc: Li Chen Cc: Michael Ellerman Cc: Paul Mackerras Cc: Petr Mladek Cc: Russell King Cc: ye xingchen Cc: Zeal Robot Signed-off-by: Andrew Morton Signed-off-by: Sasha Levin --- fs/proc/vmcore.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index 0bfd71bec7f2..2ed309191d91 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -1177,6 +1177,7 @@ static int __init vmcore_init(void) return rc; rc = parse_crash_elf_headers(); if (rc) { + elfcorehdr_free(elfcorehdr_addr); pr_warn("Kdump: vmcore not initialized\n"); return rc; } -- 2.35.1