Re: [PATCH 6.1 000/982] 6.1.189-rc1 review

Re: [PATCH 6.1 000/982] 6.1.189-rc1 review

[jungwon park]

 > This is the start of the stable review cycle for the 6.1.189 release.
 > There are 982 patches in this series, all will be posted as a response
 > to this one.  If anyone has any issues with these being applied, please
 > let me know.
 >
 > Responses should be made by Fri, 02 Oct 2026 15:23:04 +0000.
 > Anything received after that time might be too late.
 >
 > The whole patch series can be found in one patch at:
 > 
  https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.1.189-rc1.gz
 > or in the git tree and branch at:
 > 
  git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git 
linux-6.1.y
 > and the diffstat can be found below.
 >
 > thanks,
 >
 > greg k-h

Hi!

VXLAN stops working after applying patch-6.1.189-rc1.

all VXLAN packets are dropped (only the "dropped" counter keeps increasing).
This appears to be caused by the patch titled "vxlan: Pull inner IP 
header in vxlan_xmit_one()" - 667b5d5945e8947868fef8d75bf3ce4accb81b30.

It seems likely that this patch was written before the change to 
skb_vlan_inet_prepare() (net: tunnel: make skb_vlan_inet_prepare() 
return drop reasons) was implemented - 
6dedc8c2a4bfc64ef07410634e944c0506eb98c1).

Best regards,

Jungwon

Re: [PATCH 6.1 000/982] 6.1.189-rc1 review

[Greg KH]

On Fri, Oct 02, 2026 at 02:16:50PM +0900, jungwon park wrote:
> > This is the start of the stable review cycle for the 6.1.189 release.
> > There are 982 patches in this series, all will be posted as a response
> > to this one.  If anyone has any issues with these being applied, please
> > let me know.
> >
> > Responses should be made by Fri, 02 Oct 2026 15:23:04 +0000.
> > Anything received after that time might be too late.
> >
> > The whole patch series can be found in one patch at:
> >  https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.1.189-rc1.gz
> > or in the git tree and branch at:
> >  git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
> linux-6.1.y
> > and the diffstat can be found below.
> >
> > thanks,
> >
> > greg k-h
> 
> Hi!
> 
> VXLAN stops working after applying patch-6.1.189-rc1.
> 
> all VXLAN packets are dropped (only the "dropped" counter keeps increasing).
> This appears to be caused by the patch titled "vxlan: Pull inner IP header
> in vxlan_xmit_one()" - 667b5d5945e8947868fef8d75bf3ce4accb81b30.
> 
> It seems likely that this patch was written before the change to
> skb_vlan_inet_prepare() (net: tunnel: make skb_vlan_inet_prepare() return
> drop reasons) was implemented - 6dedc8c2a4bfc64ef07410634e944c0506eb98c1).

Thanks, I'll go drop this from 6.1.y, 5.15.y, and 5.10.y

greg k-h

Re: [PATCH 6.1 000/982] 6.1.189-rc1 review

[Sasha Levin]

> > This appears to be caused by the patch titled "vxlan: Pull inner IP header
> > in vxlan_xmit_one()" - 667b5d5945e8947868fef8d75bf3ce4accb81b30.
>
> Thanks, I'll go drop this from 6.1.y, 5.15.y, and 5.10.y

The drop took out the wrong vxlan patch. "vxlan: Pull inner IP header in
vxlan_xmit_one()" was already out of the 6.1 queue (I dropped it on 10-01,
after rc1 was cut) and was never queued for 5.15 or 5.10.

What came out of 6.1, 5.15 and 5.10 instead was 481506a756dc ("vxlan: use one
headroom snapshot for neighbour replies"). It only touches vxlan_na_create()
and fixes a KASAN-confirmed out-of-bounds write there, so it can't cause the
dropped packets reported here. I've re-queued it for 6.1, 5.15 and 5.10.

-- 
Thanks,
Sasha