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=-10.3 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 14F79C433E0 for ; Mon, 3 Aug 2020 17:12:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DEB6420A8B for ; Mon, 3 Aug 2020 17:12:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="kqFYnOVq" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728384AbgHCRMo (ORCPT ); Mon, 3 Aug 2020 13:12:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58392 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726878AbgHCRMo (ORCPT ); Mon, 3 Aug 2020 13:12:44 -0400 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:32c8:5054:ff:fe00:142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A36C9C06174A; Mon, 3 Aug 2020 10:12:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=a4yiFZSXRsBVbohmfx7FDLAnp12OJjyh0v7RJM5PeaY=; b=kqFYnOVq8dafpmcb5NQmBTY+1 5hfwe97tAx/9KZ5EiuTchyF8GoIZ1wN79lbFH1lIhlZvD4jNBgKskJ+daV8eTPugKgbs5tKq122rt RIyQR+dhA8CMoNn8zWCawbDQf+uzkWT0l5NI+2svvtLhqnTrUt6QetR2MKlUsplSutiT0Raa1Pe9x rCBfBUDY1iWQdE8D+gpgT0RT6r3mAhwNdXzsy3Hp8X0Bj9T2g28TL3wZ3UAylAm7r73aYbGy1rxMf 22NtpeWKTRo9YpSh7HPMSyXce0YLOF5wPFRLnQNsLffCEdzEKCt+GtM1ZkBBYe+GocrTfilvgAgIz zapLSHZiQ==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:47878) by pandora.armlinux.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1k2e0q-0001mF-To; Mon, 03 Aug 2020 18:12:36 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1k2e0n-0003GQ-1C; Mon, 03 Aug 2020 18:12:33 +0100 Date: Mon, 3 Aug 2020 18:12:33 +0100 From: Russell King - ARM Linux admin To: syzbot Cc: davem@davemloft.net, johan.hedberg@gmail.com, kuba@kernel.org, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, marcel@holtmann.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: KASAN: slab-out-of-bounds Read in hci_le_meta_evt Message-ID: <20200803171232.GR1551@shell.armlinux.org.uk> References: <000000000000a876b805abfa77e0@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000a876b805abfa77e0@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dear syzbot, Please explain why you are spamming me with all these reports - four so far. I don't understand why you think I should be doing anything with these. Thanks. On Mon, Aug 03, 2020 at 08:05:21AM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 5a30a789 Merge tag 'x86-urgent-2020-08-02' of git://git.ke.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=11cd21cc900000 > kernel config: https://syzkaller.appspot.com/x/.config?x=c0cfcf935bcc94d2 > dashboard link: https://syzkaller.appspot.com/bug?extid=24ebd650e20bd263ca01 > compiler: gcc (GCC) 10.1.0-syz 20200507 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10fd4504900000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14aa36a4900000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+24ebd650e20bd263ca01@syzkaller.appspotmail.com > > Bluetooth: hci0: unknown advertising packet type: 0x2b > ================================================================== > BUG: KASAN: slab-out-of-bounds in hci_le_direct_adv_report_evt net/bluetooth/hci_event.c:5850 [inline] > BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x380c/0x3eb0 net/bluetooth/hci_event.c:5914 > Read of size 1 at addr ffff8880a727de0c by task kworker/u5:0/1535 > > CPU: 1 PID: 1535 Comm: kworker/u5:0 Not tainted 5.8.0-rc7-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Workqueue: hci0 hci_rx_work > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x18f/0x20d lib/dump_stack.c:118 > print_address_description.constprop.0.cold+0xae/0x436 mm/kasan/report.c:383 > __kasan_report mm/kasan/report.c:513 [inline] > kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 > hci_le_direct_adv_report_evt net/bluetooth/hci_event.c:5850 [inline] > hci_le_meta_evt+0x380c/0x3eb0 net/bluetooth/hci_event.c:5914 > hci_event_packet+0x245a/0x86f5 net/bluetooth/hci_event.c:6167 > hci_rx_work+0x22e/0xb10 net/bluetooth/hci_core.c:4705 > process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 > worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 > kthread+0x3b5/0x4a0 kernel/kthread.c:291 > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 > > Allocated by task 6834: > save_stack+0x1b/0x40 mm/kasan/common.c:48 > set_track mm/kasan/common.c:56 [inline] > __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494 > __kmalloc_reserve net/core/skbuff.c:142 [inline] > __alloc_skb+0xae/0x550 net/core/skbuff.c:210 > alloc_skb include/linux/skbuff.h:1083 [inline] > bt_skb_alloc include/net/bluetooth/bluetooth.h:377 [inline] > vhci_get_user drivers/bluetooth/hci_vhci.c:165 [inline] > vhci_write+0xbd/0x450 drivers/bluetooth/hci_vhci.c:285 > call_write_iter include/linux/fs.h:1908 [inline] > new_sync_write+0x422/0x650 fs/read_write.c:503 > vfs_write+0x59d/0x6b0 fs/read_write.c:578 > ksys_write+0x12d/0x250 fs/read_write.c:631 > do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 > entry_SYSCALL_64_after_hwframe+0x44/0xa9 > > Freed by task 6627: > save_stack+0x1b/0x40 mm/kasan/common.c:48 > set_track mm/kasan/common.c:56 [inline] > kasan_set_free_info mm/kasan/common.c:316 [inline] > __kasan_slab_free+0xf5/0x140 mm/kasan/common.c:455 > __cache_free mm/slab.c:3426 [inline] > kfree+0x103/0x2c0 mm/slab.c:3757 > tomoyo_find_next_domain+0x81d/0x1f77 security/tomoyo/domain.c:885 > tomoyo_bprm_check_security security/tomoyo/tomoyo.c:101 [inline] > tomoyo_bprm_check_security+0x121/0x1a0 security/tomoyo/tomoyo.c:91 > security_bprm_check+0x45/0xa0 security/security.c:840 > search_binary_handler fs/exec.c:1737 [inline] > exec_binprm fs/exec.c:1790 [inline] > __do_execve_file+0x1577/0x2ee0 fs/exec.c:1926 > do_execveat_common fs/exec.c:1980 [inline] > do_execve+0x35/0x50 fs/exec.c:1997 > __do_sys_execve fs/exec.c:2073 [inline] > __se_sys_execve fs/exec.c:2068 [inline] > __x64_sys_execve+0x7c/0xa0 fs/exec.c:2068 > do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 > entry_SYSCALL_64_after_hwframe+0x44/0xa9 > > The buggy address belongs to the object at ffff8880a727dc00 > which belongs to the cache kmalloc-512 of size 512 > The buggy address is located 12 bytes to the right of > 512-byte region [ffff8880a727dc00, ffff8880a727de00) > The buggy address belongs to the page: > page:ffffea00029c9f40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 > flags: 0xfffe0000000200(slab) > raw: 00fffe0000000200 ffffea00029e3848 ffffea0002731b88 ffff8880aa000a80 > raw: 0000000000000000 ffff8880a727d000 0000000100000004 0000000000000000 > page dumped because: kasan: bad access detected > > Memory state around the buggy address: > ffff8880a727dd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ffff8880a727dd80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > >ffff8880a727de00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ^ > ffff8880a727de80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8880a727df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ================================================================== > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@googlegroups.com. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > syzbot can test patches for this issue, for details see: > https://goo.gl/tpsmEJ#testing-patches > -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!