From: Pablo Neira Ayuso <pablo@netfilter.org>
To: wenxu@ucloud.cn
Cc: davem@davemloft.net, netfilter-devel@vger.kernel.org,
netdev@vger.kernel.org
Subject: Re: [PATCH net-next] net/sched: Fix kernel NULL pointer dereference
Date: Thu, 11 Jul 2019 00:03:37 +0200 [thread overview]
Message-ID: <20190710220337.tbflwdku4332ewo5@salvia> (raw)
In-Reply-To: <1562766304-20272-1-git-send-email-wenxu@ucloud.cn>
On Wed, Jul 10, 2019 at 09:45:04PM +0800, wenxu@ucloud.cn wrote:
> From: wenxu <wenxu@ucloud.cn>
>
> [ 697.665184] BUG: kernel NULL pointer dereference, address: 0000000000000030
> [ 697.665550] #PF: supervisor read access in kernel mode
> [ 697.665906] #PF: error_code(0x0000) - not-present page
> [ 697.666297] PGD 800000104e636067 P4D 800000104e636067 PUD ff4b02067 PMD 0
> [ 697.666710] Oops: 0000 [#1] SMP PTI
> [ 697.667115] CPU: 31 PID: 24466 Comm: modprobe Kdump: loaded Tainted: G O 5.2.0-rc6+ #1
> [ 697.667867] Hardware name: Huawei Technologies Co., Ltd. RH1288 V3/BC11HGSC0, BIOS 3.57 02/26/2017
> [ 697.668620] RIP: 0010:tc_indr_block_ing_cmd.isra.52+0x4c/0xb0
> [ 697.669029] Code: 83 ec 40 65 48 8b 04 25 28 00 00 00 48 89 45 e8 31 c0 f3 48 ab 48 8b 06 49 8b b3 e8 04 00 00 44 89 45 b0 c7 45 b4 01 00 00 00 <8b> 48 30 48 89 75 c0 85 c9 48 8d 4d b0 0f 95 45 b8 48 85 c0 4c 8d
> [ 697.670132] RSP: 0018:ffffc90007bf7958 EFLAGS: 00010246
> [ 697.670537] RAX: 0000000000000000 RBX: ffff88905e2cbae8 RCX: 0000000000000000
> [ 697.670938] RDX: ffff88905e2cbcd8 RSI: ffffffff823a8480 RDI: ffffc90007bf7990
> [ 697.671352] RBP: ffffc90007bf79a8 R08: 0000000000000000 R09: ffff88905e2cbcc0
> [ 697.671761] R10: ffff888107c07780 R11: ffff88902c249000 R12: ffff88905e2cbcd0
> [ 697.672173] R13: ffff88905e2cbac0 R14: ffff88885596bc00 R15: ffff88905e2cbcc0
> [ 697.672582] FS: 00007fe0b4095740(0000) GS:ffff88905fbc0000(0000) knlGS:0000000000000000
> [ 697.673335] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 697.673746] CR2: 0000000000000030 CR3: 0000000ff46b4005 CR4: 00000000001606e0
> [ 697.674156] Call Trace:
> [ 697.674563] __tc_indr_block_cb_register+0x11e/0x3c0
> [ 697.674998] mlx5e_nic_rep_netdevice_event+0x9e/0x110 [mlx5_core]
> [ 697.675411] notifier_call_chain+0x53/0xa0
> [ 697.675812] raw_notifier_call_chain+0x16/0x20
> [ 697.676223] call_netdevice_notifiers_info+0x2d/0x60
> [ 697.676633] register_netdevice+0x3fa/0x500
>
> get indr_dev->block after check it.
>
> Fixes: 955bcb6ea0df ("drivers: net: use flow block API")
> Signed-off-by: wenxu <wenxu@ucloud.cn>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
next prev parent reply other threads:[~2019-07-10 22:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-10 13:45 [PATCH net-next] net/sched: Fix kernel NULL pointer dereference wenxu
2019-07-10 22:03 ` Pablo Neira Ayuso [this message]
2019-07-10 23:13 ` Pablo Neira Ayuso
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