ACK: [SRU Jammy,Kinetic,Lunar,OEM-6.0,OEM-6.1 0/1] CVE-2023-3389

[Tim Gardner]

On 7/4/23 5:51 PM, Thadeu Lima de Souza Cascardo wrote:
> [Impact]
> A race with a linked timeout io_uring OP and poll removal may lead to a
> use-after-free. An unprivileged user can use this to cause a denial of
> service (system crash) or code execution.
> 
> [Backport]
> 5.15 had a backport of its own upstream, which was used for both Jammy and
> Kinetic. The original upstream fix applieds to Lunar, OEM-6.1 and OEM-6.0.
> 
> [Potential regression]
> Poll removal on io-uring can regress.
> 
> Jens Axboe (1):
>    io_uring: hold uring mutex around poll removal
> 
>   io_uring/io_uring.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>
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Tim Gardner
Canonical, Inc