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From: "wanghai (M)" <wanghai26@huawei.com>
To: syzbot <syzbot+6024817a931b2830bc93@syzkaller.appspotmail.com>,
	<alexander.h.duyck@intel.com>, <amritha.nambiar@intel.com>,
	<andriy.shevchenko@linux.intel.com>, <davem@davemloft.net>,
	<dmitry.torokhov@gmail.com>, <f.fainelli@gmail.com>,
	<idosch@mellanox.com>, <joe@perches.com>,
	<linux-kernel@vger.kernel.org>, <netdev@vger.kernel.org>,
	<stephen@networkplumber.org>, <syzkaller-bugs@googlegroups.com>,
	<tyhicks@canonical.com>, <yuehaibing@huawei.com>,
	<gregkh@linuxfoundation.org>
Subject: Re: kernel BUG at net/core/net-sysfs.c:LINE!
Date: Thu, 4 Apr 2019 11:19:03 +0800	[thread overview]
Message-ID: <79eff7ec-4127-e58c-bf11-ade3b482fb43@huawei.com> (raw)
In-Reply-To: <000000000000e644ba0584bdf7e8@google.com>

Can someone fix this issue? Thanks.

在 2019/3/23 15:32, syzbot 写道:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit:    e382d91f Add linux-next specific files for 20190322
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=1737671b200000
> kernel config: https://syzkaller.appspot.com/x/.config?x=3d850e8b394c7a19
> dashboard link: 
> https://syzkaller.appspot.com/bug?extid=6024817a931b2830bc93
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1795613b200000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10f5a437200000
>
> The bug was bisected to:
>
> commit 6b70fc94afd165342876e53fc4b2f7d085009945
> Author: Wang Hai <wanghai26@huawei.com>
> Date:   Wed Mar 20 18:25:05 2019 +0000
>
>     net-sysfs: Fix memory leak in netdev_register_kobject
>
> bisection log: 
> https://syzkaller.appspot.com/x/bisect.txt?x=1522556d200000
> final crash: https://syzkaller.appspot.com/x/report.txt?x=1722556d200000
> console output: https://syzkaller.appspot.com/x/log.txt?x=1322556d200000
>
> IMPORTANT: if you fix the bug, please add the following tag to the 
> commit:
> Reported-by: syzbot+6024817a931b2830bc93@syzkaller.appspotmail.com
> Fixes: 6b70fc94afd1 ("net-sysfs: Fix memory leak in 
> netdev_register_kobject")
>
> RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441399
> RDX: 0000000020000080 RSI: 00000000000089f1 RDI: 0000000000000006
> RBP: 00007ffcd20666d0 R08: 0000000000000001 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
> R13: 0000000000000007 R14: 0000000000000000 R15: 0000000000000000
> ------------[ cut here ]------------
> kernel BUG at net/core/net-sysfs.c:1631!
> invalid opcode: 0000 [#1] PREEMPT SMP KASAN
> CPU: 1 PID: 8035 Comm: syz-executor344 Not tainted 
> 5.1.0-rc1-next-20190322 #9
> Hardware name: Google Google Compute Engine/Google Compute Engine, 
> BIOS Google 01/01/2011
> RIP: 0010:netdev_release net/core/net-sysfs.c:1631 [inline]
> RIP: 0010:netdev_release+0x92/0xb0 net/core/net-sysfs.c:1627
> Code: 48 c1 ea 03 80 3c 02 00 75 29 48 8b bb 80 fa ff ff e8 12 77 20 
> fc 4c 89 ef e8 7a cc f5 ff 5b 41 5c 41 5d 5d c3 e8 9e 9b e8 fb <0f> 0b 
> e8 27 b1 20 fc eb 9c e8 80 b1 20 fc eb d0 0f 1f 40 00 66 2e
> RSP: 0018:ffff88808d6af718 EFLAGS: 00010293
> RAX: ffff8880a87902c0 RBX: ffff88808e3612a0 RCX: ffffffff8587fc89
> RDX: 0000000000000000 RSI: ffffffff8587fcd2 RDI: 0000000000000001
> RBP: ffff88808d6af730 R08: ffff8880a87902c0 R09: ffff8880a8790b60
> R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
> R13: ffff88808e360d00 R14: 0000000000000000 R15: 0000000000000000
> FS:  0000000001752880(0000) GS:ffff8880ae900000(0000) 
> knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000000000000 CR3: 0000000098da2000 CR4: 00000000001406e0
> Call Trace:
>  device_release+0x7d/0x210 drivers/base/core.c:1064
>  kobject_cleanup lib/kobject.c:662 [inline]
>  kobject_release lib/kobject.c:691 [inline]
>  kref_put include/linux/kref.h:67 [inline]
>  kobject_put.cold+0x28f/0x2ec lib/kobject.c:708
>  put_device+0x20/0x30 drivers/base/core.c:2205
>  netdev_register_kobject+0x1a1/0x3c0 net/core/net-sysfs.c:1763
>  register_netdevice+0x878/0xff0 net/core/dev.c:8709
>  ip6_tnl_create2+0x1c2/0x350 net/ipv6/ip6_tunnel.c:269
>  ip6_tnl_create net/ipv6/ip6_tunnel.c:320 [inline]
>  ip6_tnl_locate+0x63f/0x8d0 net/ipv6/ip6_tunnel.c:368
>  ip6_tnl_ioctl+0x490/0xab0 net/ipv6/ip6_tunnel.c:1634
>  dev_ifsioc+0x257/0x990 net/core/dev_ioctl.c:322
>  dev_ioctl+0x286/0xc90 net/core/dev_ioctl.c:513
>  sock_ioctl+0x48b/0x610 net/socket.c:1102
>  vfs_ioctl fs/ioctl.c:46 [inline]
>  file_ioctl fs/ioctl.c:509 [inline]
>  do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696
>  ksys_ioctl+0xab/0xd0 fs/ioctl.c:713
>  __do_sys_ioctl fs/ioctl.c:720 [inline]
>  __se_sys_ioctl fs/ioctl.c:718 [inline]
>  __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
>  do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
>  entry_SYSCALL_64_after_hwframe+0x49/0xbe
> RIP: 0033:0x441399
> Code: e8 5c ae 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 bb 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
> RSP: 002b:00007ffcd20666b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441399
> RDX: 0000000020000080 RSI: 00000000000089f1 RDI: 0000000000000006
> RBP: 00007ffcd20666d0 R08: 0000000000000001 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
> R13: 0000000000000007 R14: 0000000000000000 R15: 0000000000000000
> Modules linked in:
> ---[ end trace 0dbf190846958075 ]---
> RIP: 0010:netdev_release net/core/net-sysfs.c:1631 [inline]
> RIP: 0010:netdev_release+0x92/0xb0 net/core/net-sysfs.c:1627
> Code: 48 c1 ea 03 80 3c 02 00 75 29 48 8b bb 80 fa ff ff e8 12 77 20 
> fc 4c 89 ef e8 7a cc f5 ff 5b 41 5c 41 5d 5d c3 e8 9e 9b e8 fb <0f> 0b 
> e8 27 b1 20 fc eb 9c e8 80 b1 20 fc eb d0 0f 1f 40 00 66 2e
> RSP: 0018:ffff88808d6af718 EFLAGS: 00010293
> RAX: ffff8880a87902c0 RBX: ffff88808e3612a0 RCX: ffffffff8587fc89
> RDX: 0000000000000000 RSI: ffffffff8587fcd2 RDI: 0000000000000001
> RBP: ffff88808d6af730 R08: ffff8880a87902c0 R09: ffff8880a8790b60
> R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
> R13: ffff88808e360d00 R14: 0000000000000000 R15: 0000000000000000
> FS:  0000000001752880(0000) GS:ffff8880ae900000(0000) 
> knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000000000000 CR3: 0000000098da2000 CR4: 00000000001406e0
>
>
> ---
> 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#status for how to communicate with syzbot.
> For information about bisection process see: 
> https://goo.gl/tpsmEJ#bisection
> syzbot can test patches for this bug, for details see:
> https://goo.gl/tpsmEJ#testing-patches
>
> .
>


  parent reply	other threads:[~2019-04-04  3:19 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-23  7:32 kernel BUG at net/core/net-sysfs.c:LINE! syzbot
2019-03-23 17:16 ` Andy Shevchenko
2019-03-25 15:20   ` wanghai (M)
2019-03-25 16:10     ` Andy Shevchenko
2019-03-25 18:55       ` Dmitry Torokhov
2019-03-25 19:18         ` Dmitry Torokhov
2019-04-04  3:19 ` wanghai (M) [this message]
2019-04-04  3:53   ` Eric Dumazet
2019-04-05  2:55   ` Al Viro

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