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 4D998C77B7D for ; Mon, 15 May 2023 17:24:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244197AbjEORYO (ORCPT ); Mon, 15 May 2023 13:24:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39958 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244105AbjEORXp (ORCPT ); Mon, 15 May 2023 13:23:45 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 79BBAD06C for ; Mon, 15 May 2023 10:22:22 -0700 (PDT) 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 1751B62C77 for ; Mon, 15 May 2023 17:22:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 218BFC4339B; Mon, 15 May 2023 17:22:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1684171341; bh=q4w0+U513VitpwFD4lMi/QpdKyHY0TOfvVAnetzZqeU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pN2WpQjRknv8bswUL1QNwlqyQC4KkdcymPYuvWYVLhtPSkqpb8Ju33sSfNrlD8BgR dO/7ytzxdfn8QbBWVQtlwznKzug+ajFauB/sSqTVknH9cj0HX6CPWW8oBYMuJBcQr1 X3t9QIO6js6f90SBYMqsoEpE9MOfEOpIEpr17bu4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chao Yu , Jaegeuk Kim Subject: [PATCH 6.2 179/242] f2fs: fix null pointer panic in tracepoint in __replace_atomic_write_block Date: Mon, 15 May 2023 18:28:25 +0200 Message-Id: <20230515161727.245402905@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230515161721.802179972@linuxfoundation.org> References: <20230515161721.802179972@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jaegeuk Kim commit da6ea0b050fa720302b56fbb59307e7c7531a342 upstream. We got a kernel panic if old_addr is NULL. https://bugzilla.kernel.org/show_bug.cgi?id=217266 BUG: kernel NULL pointer dereference, address: 0000000000000000 Call Trace: f2fs_commit_atomic_write+0x619/0x990 [f2fs a1b985b80f5babd6f3ea778384908880812bfa43] __f2fs_ioctl+0xd8e/0x4080 [f2fs a1b985b80f5babd6f3ea778384908880812bfa43] ? vfs_write+0x2ae/0x3f0 ? vfs_write+0x2ae/0x3f0 __x64_sys_ioctl+0x91/0xd0 do_syscall_64+0x5c/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f69095fe53f Fixes: 2f3a9ae990a7 ("f2fs: introduce trace_f2fs_replace_atomic_write_block") Cc: Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Greg Kroah-Hartman --- fs/f2fs/segment.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -263,7 +263,7 @@ retry: f2fs_put_dnode(&dn); trace_f2fs_replace_atomic_write_block(inode, F2FS_I(inode)->cow_inode, - index, *old_addr, new_addr, recover); + index, old_addr ? *old_addr : 0, new_addr, recover); return 0; }