Re: [PATCH net v2] net: reduce XMIT_RECURSION_LIMIT under KASAN

On Sat, 11 Jul 2026 20:47:00 +0000 Tristan Madani wrote:

Virtual network devices (ipvlan, macvlan, bonding) can enter legitimate
transmit recursion when combined with packet forwarding configurations
such as IPVS NAT.  The existing XMIT_RECURSION_LIMIT (8) in
__dev_queue_xmit() detects and breaks these loops, but the allowed
depth is too high for KASAN-instrumented kernels: each recursion level
consumes significantly more stack due to KASAN inline instrumentation,
and the cumulative usage overflows the kernel stack before the limit
fires.

This patch was marked as changes requested, I'm not sure why.
If it is still valid please repost (please start a new thread,
please add a link to the previous posting under --- like this:

v3:
 - no changes
v2: https://lore.kernel.org/20260711204700.1760374-1-tristmd@gmail.com (local)