Merge branch 'net-x25-fix-overflow-and-double-free'

Martin Schiller says:

====================
net/x25: Fix overflow and double free

This patch set includes 2 fixes:

The first removes a potential double free of received skb
The second fixes an overflow when accumulating packets with the more-bit
set.

Signed-off-by: Martin Schiller <ms@dev.tdt.de>
====================

Link: https://patch.msgid.link/20260331-x25_fraglen-v4-0-3e69f18464b4@dev.tdt.de
Signed-off-by: Paolo Abeni <pabeni@redhat.com>