NACK/Cmnt: [SRU][N][PATCH 0/1] System hang when using DW5823E WWAN on Arches 15

[Stefan Bader]

On 23.10.24 15:32, En-Wei Wu wrote:
> BugLink: https://bugs.launchpad.net/bugs/2085431
> 
> [Impact]
> When using DW5823E WWAN modem (iosm kernel module) with IPSec (xfrm kernel module), the system will eventually hang after using the network.
> 
> [Fix]
> The upstream fix is still under review here:
> https://lore.kernel.org/netdev/20240912071702.221128-1-en-wei.wu@canonical.com/
> 
> Out of the urgency, we'd apply this patch to be an Ubuntu sauce patch into Noble 6.8.
> 
> [Test Plan]
> 1. Install the latest Ubuntu oem / public image on the system with DW5823e WWAN card
> 2. insert the SIM card into the GSM modem and establish a connection to the GSM network
> 3. setting up an IPSec tunnel (through the XFRM kernel module).
> 4. launching a browser, e.g. Firefox, and running any HTML page on the remote side (i.e. tunnel communication), even a 'ping' through tunnel will cause the issue
> 
> [Where problems could occur]
> May cause regression.
> 
> En-Wei Wu (1):
>    UBUNTU: SAUCE: xfrm: check MAC header is shown with both skb->mac_len
>      and skb_mac_header_was_set()
> 
>   net/xfrm/xfrm_input.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
Rejected for the following reasons:
This has not been accepted upstream for a long time. The discussion 
pointed at sounds a bit like the condition this tries to avoid never 
should happen and it would be the hw driver to be fixed. Also it seems 
that this was not urgent enough anyway to cause any feedback or inquiry 
about it not being present...

-Stefan

-- 
- Stefan
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