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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, 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 A54E5C43387 for ; Mon, 7 Jan 2019 09:53:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7380620859 for ; Mon, 7 Jan 2019 09:53:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726765AbfAGJxJ (ORCPT ); Mon, 7 Jan 2019 04:53:09 -0500 Received: from mail-io1-f70.google.com ([209.85.166.70]:46147 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726540AbfAGJxF (ORCPT ); Mon, 7 Jan 2019 04:53:05 -0500 Received: by mail-io1-f70.google.com with SMTP id o22so48917515iob.13 for ; Mon, 07 Jan 2019 01:53:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=8jXAiCovYH+RMKtzoCCq7iDBPVKBkP0pEeDTbUP1ET0=; b=GAyBhn3hF+Ai875ym3ocEAXM43MRUfTJaoX4+RT7n7JjGfHZcA18+IFTkFRgfDBERx V435M5a8eOZVfSxPMgbtTmswfomSyasf8T3sF5/2C8BWO+NTAlXMoXVCSAtxPIl66Yyd cPAMC14pbNLOgS1P/Gx5oyQXWPD3xmn5CWbRlyB/Zs1V0EEJmpCWod9qoCp2UFDmN10q FC43gfIqXlxygKTKQAgDd3p6/VqJWQlbvcITVioaP9axjebwEyFFdOQP7sYVZnup7V/F wxUgN94rTa+lscnU80UFya7qCWqMj0281ZHZXl9WFTaQNxqmeHuJS/7vFsoAsxwqGdbv uSug== X-Gm-Message-State: AJcUukeYny3I4pff1PWoe+i3GwNeUlKfyE5HTiTTDy1bAEHK7OP/AG+x I1E6VjvqrTeStG4opi/3K6jskUxnaEQ0EKpOO+RP+3pmHr8f X-Google-Smtp-Source: ALg8bN66d8FmUeHYamNimSyOR93nrgWiPOZDYJafc5bxoRStHX+5HfsTmxJfkauVdgt2pWJsSEeG2iRhAr8WwqF4e/aTu9Fct/kx MIME-Version: 1.0 X-Received: by 2002:a5e:a913:: with SMTP id c19mr13609576iod.32.1546854784150; Mon, 07 Jan 2019 01:53:04 -0800 (PST) Date: Mon, 07 Jan 2019 01:53:04 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000edb77b057edb31d9@google.com> Subject: KASAN: use-after-free Read in xfrm_migrate From: syzbot To: davem@davemloft.net, herbert@gondor.apana.org.au, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, steffen.klassert@secunet.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: b71acb0e3721 Merge branch 'linus' of git://git.kernel.org/.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=1755f9bb400000 kernel config: https://syzkaller.appspot.com/x/.config?x=b03c5892bb940c76 dashboard link: https://syzkaller.appspot.com/bug?extid=efd77299e1e802fe8f8f compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+efd77299e1e802fe8f8f@syzkaller.appspotmail.com netlink: 'syz-executor0': attribute type 1 has an invalid length. ================================================================== BUG: KASAN: use-after-free in xfrm_migrate_policy_find net/xfrm/xfrm_policy.c:4055 [inline] BUG: KASAN: use-after-free in xfrm_migrate+0x178f/0x1a30 net/xfrm/xfrm_policy.c:4193 Read of size 4 at addr ffff888063d41bf4 by task syz-executor5/17251 CPU: 1 PID: 17251 Comm: syz-executor5 Not tainted 4.20.0+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 netlink: 4 bytes leftover after parsing attributes in process `syz-executor1'. print_address_description.cold+0x7c/0x20d mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 xfrm_migrate_policy_find net/xfrm/xfrm_policy.c:4055 [inline] xfrm_migrate+0x178f/0x1a30 net/xfrm/xfrm_policy.c:4193 xfrm_do_migrate+0x9e5/0xd90 net/xfrm/xfrm_user.c:2380 xfrm_user_rcv_msg+0x458/0x8d0 net/xfrm/xfrm_user.c:2663 netlink_rcv_skb+0x17d/0x410 net/netlink/af_netlink.c:2477 xfrm_netlink_rcv+0x70/0x90 net/xfrm/xfrm_user.c:2671 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x574/0x770 net/netlink/af_netlink.c:1336 netlink_sendmsg+0xa05/0xf90 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:631 ___sys_sendmsg+0x7ec/0x910 net/socket.c:2116 kobject: 'phy44' (000000002305d5de): kobject_uevent_env kobject: 'phy44' (000000002305d5de): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim43/ieee80211/phy44' __sys_sendmsg+0x112/0x270 net/socket.c:2154 kobject: 'rfkill45' (00000000c83ac774): kobject_add_internal: parent: 'phy44', set: 'devices' __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg net/socket.c:2161 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 kobject: 'rfkill45' (00000000c83ac774): kobject_uevent_env entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe250302c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe2503036d4 R13: 00000000004c5394 R14: 00000000004d8e30 R15: 00000000ffffffff Allocated by task 17077: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531 __do_kmalloc_node mm/slab.c:3684 [inline] __kmalloc_node_track_caller+0x51/0x80 mm/slab.c:3698 __kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:140 __alloc_skb+0x12d/0x730 net/core/skbuff.c:208 alloc_skb include/linux/skbuff.h:1011 [inline] new_skb+0x28/0x1d0 drivers/block/aoe/aoecmd.c:67 kobject: 'rfkill45' (00000000c83ac774): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim43/ieee80211/phy44/rfkill45' aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:426 [inline] aoecmd_cfg+0x299/0x810 drivers/block/aoe/aoecmd.c:1381 discover_timer+0x4e/0x60 drivers/block/aoe/aoemain.c:24 call_timer_fn+0x254/0x900 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers+0x6fc/0xd50 kernel/time/timer.c:1681 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694 __do_softirq+0x30b/0xb11 kernel/softirq.c:292 Freed by task 2690: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3817 skb_free_head+0x93/0xb0 net/core/skbuff.c:553 skb_release_data+0x6ea/0x970 net/core/skbuff.c:573 skb_release_all+0x4d/0x60 net/core/skbuff.c:627 __kfree_skb net/core/skbuff.c:641 [inline] consume_skb net/core/skbuff.c:701 [inline] consume_skb+0x18c/0x550 net/core/skbuff.c:695 aoenet_rcv+0xa3/0x560 drivers/block/aoe/aoenet.c:190 __netif_receive_skb_one_core+0x160/0x210 net/core/dev.c:4973 __netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083 ieee80211 phy44: Selected rate control algorithm 'minstrel_ht' process_backlog+0x206/0x750 net/core/dev.c:5923 napi_poll net/core/dev.c:6346 [inline] net_rx_action+0x76d/0x1930 net/core/dev.c:6412 __do_softirq+0x30b/0xb11 kernel/softirq.c:292 The buggy address belongs to the object at ffff888063d41b40 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 180 bytes inside of 1024-byte region [ffff888063d41b40, ffff888063d41f40) The buggy address belongs to the page: kobject: 'net' (000000009ee70099): kobject_add_internal: parent: 'hwsim43', set: '(null)' page:ffffea00018f5000 count:1 mapcount:0 mapping:ffff88812c3f0ac0 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea0002418f88 ffffea0002536a08 ffff88812c3f0ac0 raw: 0000000000000000 ffff888063d40040 0000000100000007 0000000000000000 page dumped because: kasan: bad access detected kobject: 'wlan13' (000000005b6395aa): kobject_add_internal: parent: 'net', set: 'devices' Memory state around the buggy address: ffff888063d41a80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888063d41b00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb > ffff888063d41b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888063d41c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888063d41c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot.