From: "Dr. H. Nikolaus Schaller" <hns@goldelico.com>
To: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Sebastian Reichel <sre@kernel.org>,
Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>,
David Woodhouse <dwmw2@infradead.org>,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC/RFT v2 0/2] power_supply: Fix NULL pointer dereference from uevent
Date: Tue, 19 May 2015 10:28:39 +0200 [thread overview]
Message-ID: <77C4D085-96E6-4874-BD7A-AC4BDFAC3A58@goldelico.com> (raw)
In-Reply-To: <1432019582-27612-1-git-send-email-k.kozlowski@samsung.com>
Hi,
Am 19.05.2015 um 09:13 schrieb Krzysztof Kozlowski <k.kozlowski@samsung.com>:
> Hi,
>
>
> Changes since v1:
> =================
> 1. Patch 2: fix invalid member used for container_of().
> 2. Patch 2: Replace WARN with pr_warn() in __power_supply_register()
> if parent is missing.
>
>
> Description:
> ============
> This is an idea to fix issue in bq27x00 driver (and probably in others)
> reported by H. Nikolaus Schaller [0].
>
> The fixes are marked RFC/RFT because:
> 1. I do not have bq27x00-like device. I confirmed this and tested on
> modified drivers (max77693, ACPI AC). These drivers are not
> impacted by the issue but one can easily adjust them to reproduce
> the problem.
> 2. The first uevent coming from power_supply_register() is now
> different because it won't contain device properties. I am
> not sure how this impacts userspace.
>
> Comments are welcomed.
appears to work! bq27000 is coming up now without hickups.
What I can’t test is if the uevent is reasonable because we do not
have a specific rule triggered by it in our system.
So from my side we are now happy with the solution.
Thanks and BR,
Nikolaus
>
>
> [0] https://lkml.org/lkml/2015/5/18/152
>
>
> Best regards,
> Krzysztof
>
> Krzysztof Kozlowski (2):
> power_supply: Fix NULL pointer dereference during bq27x00_battery
> probe
> power_supply: Fix possible NULL pointer dereference on early uevent
>
> drivers/power/power_supply_core.c | 61 +++++++++++++++++++++++++++++++++++----
> include/linux/power_supply.h | 1 +
> 2 files changed, 56 insertions(+), 6 deletions(-)
>
> --
> 1.9.1
>
next prev parent reply other threads:[~2015-05-19 8:28 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-19 7:13 [RFC/RFT v2 0/2] power_supply: Fix NULL pointer dereference from uevent Krzysztof Kozlowski
2015-05-19 7:13 ` [RFC/RFT v2 1/2] power_supply: Fix NULL pointer dereference during bq27x00_battery probe Krzysztof Kozlowski
2015-05-19 7:13 ` [RFC/RFT v2 2/2] power_supply: Fix possible NULL pointer dereference on early uevent Krzysztof Kozlowski
2015-05-19 8:28 ` Dr. H. Nikolaus Schaller [this message]
2015-05-20 22:20 ` [RFC/RFT v2 0/2] power_supply: Fix NULL pointer dereference from uevent Sebastian Reichel
2015-05-21 5:39 ` Dr. H. Nikolaus Schaller
2015-05-21 18:03 ` Sebastian Reichel
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