ACK: [UBUNTU OEM-5.17,OEM-6.0 0/5] CVE-2023-0468

[Andrei Gherzan]

On 23/04/04 09:08PM, Thadeu Lima de Souza Cascardo wrote:
> [Impact]
>  Lin Ma discovered a race condition in the io_uring subsystem in the Linux
>  kernel, leading to a null pointer dereference vulnerability. A local
>  attacker could use this to cause a denial of service (system crash).
> 
> [Fix/Backport]
> 5.15 version of these were applied to 5.17. 6.0 were clean upstream
> cherry-picks.
> 
> [Potential regression]
> io_uring users could regress.
> 
> Lin Ma (1):
>   io_uring/poll: fix poll_refs race with cancelation
> 
> Pavel Begunkov (4):
>   io_uring: update res mask in io_poll_check_events
>   io_uring: fix tw losing poll events
>   io_uring: cmpxchg for poll arm refs release
>   io_uring: make poll refs more robust
> 
>  fs/io_uring.c | 57 ++++++++++++++++++++++++++++++++++++++++++++-------
>  1 file changed, 50 insertions(+), 7 deletions(-)
> 
> -- 
> 2.34.1

Acked-by: Andrei Gherzan <andrei.gherzan at canonical.com>

-- 
Andrei Gherzan
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