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From: Johannes Thumshirn <>
To: Dan Carpenter <>
Cc: Greg Kroah-Hartman <>,
	Andreas Werner <>,,
Subject: Re: [PATCH] mcb: fix error handling in mcb_alloc_bus()
Date: Mon, 30 Aug 2021 18:06:43 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <20210830140856.GX7722@kadam>

Am 30.08.21 um 16:08 schrieb Dan Carpenter:
> On Tue, Jun 01, 2021 at 03:23:55PM +0200, Johannes Thumshirn wrote:
>> Am 01.06.21 um 11:18 schrieb Dan Carpenter:
>>> There are two bugs:
>>> 1) If ida_simple_get() fails then this code calls put_device(carrier)
>>>    but we haven't yet called get_device(carrier) and probably that
>>>    leads to a use after free.
>>> 2) After device_initialize() then we need to use put_device() to
>>>    release the bus.  This will free the internal resources tied to the
>>>    device and call mcb_free_bus() which will free the rest.
>>> Fixes: 5d9e2ab9fea4 ("mcb: Implement bus->dev.release callback")
>>> Fixes: 18d288198099 ("mcb: Correctly initialize the bus's device")
>>> Signed-off-by: Dan Carpenter <>
>> Thanks applied
> This is still not in linux-next.
> regards,
> dan carpenter

Hi Dan,

Greg asked me to resend the patch with Cc stable and I totally forgot to
do that, my bad.

I'll do that ASAP once the merge window opens again or earlier if Greg
is OK with it.


      reply	other threads:[~2021-08-30 16:06 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-01  9:18 Dan Carpenter
2021-06-01 13:23 ` Johannes Thumshirn
2021-08-06 13:32   ` Dan Carpenter
2021-08-06 13:37     ` Dan Carpenter
2021-08-30 14:08   ` Dan Carpenter
2021-08-30 16:06     ` Johannes Thumshirn [this message]

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