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

[Yuxuan Luo]

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(-)

-- 
2.43.0