From: Jakub Kicinski <kuba@kernel.org>
To: M Chetan Kumar <m.chetan.kumar@intel.com>
Cc: Samuel Wein PhD <sam@samwein.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
Intel Corporation <linuxwwan@intel.com>
Subject: Re: NULL pointer dereference when removing xmm7360 PCI device
Date: Thu, 27 Apr 2023 14:08:19 -0700 [thread overview]
Message-ID: <20230427140819.1310f4bd@kernel.org> (raw)
In-Reply-To: <Yhw4a065te-PH2rfqCYhLt4RZwLJLek2VsfLDrc8TLjfPqxbw6QKbd7L2PwjA81XlBhUr04Nm8-FjfdSsTlkKnIJCcjqHenPx4cbpRLym-U=@samwein.com>
On Thu, 27 Apr 2023 10:31:29 +0000 Samuel Wein PhD wrote:
> Hi Folks,
> I've been trying to get the xmm7360 working with IOSM and the ModemManager. This has been what my highschool advisor would call a "learning process".
> When trying `echo 1 > /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/remove` I get a variety of errors. One of these is a kernel error
> `2023-04-27T12:23:38.937223+02:00 Nase kernel: [ 587.997430] BUG: kernel NULL pointer dereference, address: 0000000000000048
> 2023-04-27T12:23:38.937237+02:00 Nase kernel: [ 587.997447] #PF: supervisor read access in kernel mode
> 2023-04-27T12:23:38.937238+02:00 Nase kernel: [ 587.997455] #PF: error_code(0x0000) - not-present page
> 2023-04-27T12:23:38.937241+02:00 Nase kernel: [ 587.997463] PGD 0 P4D 0
> 2023-04-27T12:23:38.937242+02:00 Nase kernel: [ 587.997476] Oops: 0000 [#1] PREEMPT SMP NOPTI
> 2023-04-27T12:23:38.937242+02:00 Nase kernel: [ 587.997489] CPU: 1 PID: 4767 Comm: bash Not tainted 6.3.0-060300-generic #202304232030
> ...
> `
> the full log is available at https://gist.github.com/poshul/0c5ffbde6106a71adcbc132d828dbcd7
>
> Steps to reproduce: Boot device with xmm7360 installed and in PCI mode, place into suspend. Resume, and start issuing reset/remove commands to the PCI interface (without properly unloading the IOSM module first).
>
> I'm not sure how widely applicable this is but wanted to at least report it.
Intel folks, PTAL.
next prev parent reply other threads:[~2023-04-27 21:08 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-27 10:31 NULL pointer dereference when removing xmm7360 PCI device Samuel Wein PhD
2023-04-27 21:08 ` Jakub Kicinski [this message]
2023-04-28 9:21 ` Kumar, M Chetan
2023-04-28 9:47 ` Samuel Wein PhD
2023-04-28 14:24 ` Kumar, M Chetan
2023-05-01 16:00 ` Samuel Wein PhD
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