ACK: [SRU][F][PATCH v2 0/3] CVE-2024-40967

[Kevin Becker]

On Thu, Nov 14, 2024 at 6:46 PM Yuxuan Luo <yuxuan.luo at canonical.com> wrote:
>
> v2: cherry picked prerequisites instead of backport in a wrong way.
>
> [Impact]
> A potential deadlock might occur if too much time were spent for serial
> IMX subsystem, leading to denial of service.
>
> [Backport]
> There is one conflict that needs to be solved manually when backporting
> the fix commit:
>
> 1. Declaration for usr2 variable: it is introduced by 18ee37e1382a
>    (“serial: drop irq-flags initialisations”) and merely a change of the
>    order of declaration of variables, apply it manually.
>
> Besides, read_poll_timeout_atomic macro is not in the tree yet, include
> it by cherry picking the following two prerequisites:
> 1. 57a29df34146 (“iopoll: Introduce read_poll_timeout_atomic macro”)
> 2. 5f5323a14cad (“iopoll: introduce read_poll_timeout macro”)
>
> [Test]
> Compile and boot tested only due to lack of arm64 hardware.
>
> [Where problems could occur]
> Regression might occur on all IMX CPU users.
>
> Dejin Zheng (1):
>   iopoll: introduce read_poll_timeout macro
>
> Esben Haabendal (1):
>   serial: imx: Introduce timeout when waiting on transmitter empty
>
> Kai-Heng Feng (1):
>   iopoll: Introduce read_poll_timeout_atomic macro
>
>  drivers/tty/serial/imx.c |  7 +--
>  include/linux/iopoll.h   | 92 ++++++++++++++++++++++++++++++++++------
>  2 files changed, 84 insertions(+), 15 deletions(-)
>
> --

Acked-by: Kevin Becker <kevin.becker at canonical.com>