ACK: [SRU][Bionic, Focal, Jammy, Kinetic, OEM-5.17, OEM-6.0, OEM-6.1][PATCH v2 0/1] CVE-2023-1859

[Tim Gardner]

On 4/18/23 7:58 AM, John Cabaj wrote:
> [Impact]
> * A use-after-free vulnerability could exist in xen/9pfs, whereupon after removal of a xen_9pfs device, an attempt to service a response could access a struct that has been freed.
> * Perform requisite clean-up upon removal so further requests cannot be serviced.
> 
> [Fix]
> * Clean cherry-picks for all affected kernels
> 
> [Test Case]
> * Compile tested
> * Boot tested
> 
> [Potential regression]
> * Low risk. Potentially could take longer to remove xen_9pfs device as cancel waits for work to finish.
> 
> -v2:
> * Removing oem-5.14 and adding CVE # to patch
> 
> Zheng Wang (1):
>    9p/xen : Fix use after free bug in xen_9pfs_front_remove due to race
>      condition
> 
>   net/9p/trans_xen.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>
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Tim Gardner
Canonical, Inc