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=-0.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 5175BC43441 for ; Mon, 19 Nov 2018 21:39:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0F2DB20823 for ; Mon, 19 Nov 2018 21:39:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0F2DB20823 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731215AbeKTIEk (ORCPT ); Tue, 20 Nov 2018 03:04:40 -0500 Received: from mail-io1-f70.google.com ([209.85.166.70]:35799 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731020AbeKTIEj (ORCPT ); Tue, 20 Nov 2018 03:04:39 -0500 Received: by mail-io1-f70.google.com with SMTP id n12-v6so32288900ioh.2 for ; Mon, 19 Nov 2018 13:39:03 -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=BtYGSDO4B1hZmVN2oLANc7KOz+6cCS6gl1gTy5bwZuo=; b=f/vANNMaqqDLJKmWrnUDsN4eIQfnumUQY9HzfyP5cKZVeyGjmj8O6uGPqoCRqx6cFu DRKwhn640glYtw8KfWxlXanMAcFAysiAmNM9/gtEX0tYyYi6G1EliJyDMotcKb0V2A93 smzj7Gwzu0uQ/YHgMAi5p5Rfy/QORABy19RGPBc3iMfLc+yr251TYMqfLiiNoOqBCHc1 cBB5ANVgWyUVBty/oIMgrjLKRtFKlgUJNdCTlNFLsauHmLU+dzRcxxN4EcySGpQG2n4n a0uWDf08BfPiy0yTH4pa7yBniKQKmKqtmEnbnkAZ7C9roo2jP8kLkKGPtFW7speR/hXa wNdw== X-Gm-Message-State: AA+aEWaklzQB8tbxuqM1TD2gh+APEvQANQ8kmhq4LKtKcMRidgwIk6Ls q2+EPlw6jTaQJUa78PoMRWZxs/1iDPXw5TIMRpfSZLSfZrE1 X-Google-Smtp-Source: AFSGD/WDeRMqC06XkOgAMYzmmuU3l2bZhuTewJPgcaPNus9SJIsWAJpxkttc3UyUq2NYQMBZvu81gl1VsR6tYlTkjERqphnRvCNU MIME-Version: 1.0 X-Received: by 2002:a6b:7f08:: with SMTP id l8mr13038797ioq.6.1542663542677; Mon, 19 Nov 2018 13:39:02 -0800 (PST) Date: Mon, 19 Nov 2018 13:39:02 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000007829c8057b0b58ed@google.com> Subject: KASAN: use-after-free Read in tick_sched_handle (3) From: syzbot To: fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de 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: bae4e109837b mlxsw: spectrum: Expose discard counters via .. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=11b5e77b400000 kernel config: https://syzkaller.appspot.com/x/.config?x=d86f24333880b605 dashboard link: https://syzkaller.appspot.com/bug?extid=999bca54de2ee169c021 compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14b7d093400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1487a225400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+999bca54de2ee169c021@syzkaller.appspotmail.com IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 ================================================================== kasan: CONFIG_KASAN_INLINE enabled BUG: KASAN: use-after-free in tick_sched_handle+0x16c/0x180 kernel/time/tick-sched.c:164 Read of size 8 at addr ffff8881c0895a30 by task syz-executor949/6058 kasan: GPF could be caused by NULL-ptr deref or user memory access CPU: 0 PID: 6058 Comm: syz-executor949 Not tainted 4.20.0-rc2+ #303 general protection fault: 0000 [#1] PREEMPT SMP KASAN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 CPU: 1 PID: 2938 Comm: kworker/1:2 Not tainted 4.20.0-rc2+ #303 Call Trace: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ipv6_addrconf addrconf_dad_work __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 RIP: 0010:sk_fullsock include/net/sock.h:2402 [inline] RIP: 0010:skb_set_owner_w+0xb4/0x320 net/core/sock.c:1842 Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 30 02 00 00 49 8d 7c 24 12 4c 89 63 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 cd 01 00 00 RSP: 0018:ffff8881cb9274a8 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffff8881c2cf4bc0 RCX: ffffffff86273988 print_address_description.cold.7+0x9/0x1ff mm/kasan/report.c:256 RDX: 000000000000000e RSI: ffffffff8625bddf RDI: 0000000000000074 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.8+0x242/0x309 mm/kasan/report.c:412 RBP: ffff8881cb9274d0 R08: ffff8881cb98e280 R09: ffffed103701800c R10: ffffed103701800c R11: ffff8881b80c0063 R12: 0000000000000062 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 R13: ffff8881c2cf4bd8 R14: ffff8881c2cf4c20 R15: 0000000000000020 tick_sched_handle+0x16c/0x180 kernel/time/tick-sched.c:164 FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1460 CR2: 00007fff57a32ff8 CR3: 00000001cb905000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ndisc_alloc_skb+0x284/0x340 net/ipv6/ndisc.c:419 ndisc_send_ns+0x194/0x8e0 net/ipv6/ndisc.c:609 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1034 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1059 addrconf_dad_work+0xbf2/0x1310 net/ipv6/addrconf.c:4077 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 Allocated by task 3230256160: worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: BUG: unable to handle kernel paging request at ffffffff8caa3e08 ---[ end trace 6c1017c956f17b9c ]--- PGD 946d067 P4D 946d067 PUD 946e063 PMD 0 Thread overran stack, or stack corrupted Oops: 0000 [#2] PREEMPT SMP KASAN RIP: 0010:sk_fullsock include/net/sock.h:2402 [inline] RIP: 0010:skb_set_owner_w+0xb4/0x320 net/core/sock.c:1842 CPU: 0 PID: 6058 Comm: syz-executor949 Tainted: G D 4.20.0-rc2+ #303 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:depot_fetch_stack+0x10/0x30 lib/stackdepot.c:201 Code: 89 e8 44 96 1c fe e9 87 fd ff ff e8 8a b0 a2 fd 90 90 90 90 90 90 90 90 90 90 89 f8 c1 ef 11 25 ff ff 1f 00 81 e7 f0 3f 00 00 <48> 03 3c c5 00 fa ad 8b 8b 47 0c 48 83 c7 18 c7 46 10 00 00 00 00 Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 30 02 00 00 49 8d 7c 24 12 4c 89 63 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 cd 01 00 00 RSP: 0018:ffff8881dae07a38 EFLAGS: 00010006 RAX: 00000000001f8881 RBX: ffff8881c089cb84 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8881dae07a40 RDI: 0000000000003ff0 RBP: ffff8881dae07a68 R08: ffff8881c1da0080 R09: ffffed103b5c3ef8 R10: ffffed103b5c3ef8 R11: ffff8881dae1f7c7 R12: ffffea0007022400 RSP: 0018:ffff8881cb9274a8 EFLAGS: 00010203 R13: ffff8881c0894b80 R14: ffff8881da802380 R15: ffff8881c089cb80 FS: 000000000137f880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8caa3e08 CR3: 00000001c3bee000 CR4: 00000000001406f0 RAX: dffffc0000000000 RBX: ffff8881c2cf4bc0 RCX: ffffffff86273988 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 RDX: 000000000000000e RSI: ffffffff8625bddf RDI: 0000000000000074 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: describe_object mm/kasan/report.c:243 [inline] print_address_description.cold.7+0x15b/0x1ff mm/kasan/report.c:263 RBP: ffff8881cb9274d0 R08: ffff8881cb98e280 R09: ffffed103701800c kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.8+0x242/0x309 mm/kasan/report.c:412 R10: ffffed103701800c R11: ffff8881b80c0063 R12: 0000000000000062 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 tick_sched_handle+0x16c/0x180 kernel/time/tick-sched.c:164 R13: ffff8881c2cf4bd8 R14: ffff8881c2cf4c20 R15: 0000000000000020 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274 FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1460 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001cb905000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches