ACK: [SRU OEM-5.14/HWE-5.17 0/1] CVE-2022-33743

[Tim Gardner]

On 10/11/22 8:17 PM, Cengiz Can wrote:
> [Impact]
> network backend may cause Linux netfront to use freed SKBs While adding
> logic to support XDP (eXpress Data Path), a code label was moved in a
> way allowing for SKBs having references (pointers) retained for further
> processing to nevertheless be freed.
> 
> [Fix]
> Patch was initially sent to oss-sec mailing list as an attachment.
> 
> It landed to upstream with v5.19-rc6.
> The problematic label seems to be in correct place for xenial, bionic
> and focal. jammy and kinetic already has the fix.
> 
> [Test case]
> Compile and boot tested only.
> 
> [Potential regression]
> Medium potential. Fix is moving an existing __skb_queue_tail call to be
> executed on every iteration of a for loop.
> 
> Jan Beulich (1):
>    xen-netfront: restore __skb_queue_tail() positioning in
>      xennet_get_responses()
> 
>   drivers/net/xen-netfront.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>
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Tim Gardner
Canonical, Inc