[PATCH net v3 0/2] team: fix header_ops type confusion and add selftest

[Jiayuan Chen <jiayuan.chen@linux.dev>]

Hi,

This patch series fixes a panic reported by syzkaller in the team/bond/gre
stacked non-Ethernet configuration:
https://syzkaller.appspot.com/bug?extid=3d8bc31c45e11450f24c

The first patch fixes the header_ops type confusion / parse recursion
context issue in team. The second patch adds a selftest to reproduce the
reported scenario and prevent regressions in the future.

Thanks.

---
Changes in v3:
- Clarify syzbot crash path in commit message
- Fix shellcheck warnings in selftest
- Fix config entry sorting order
- Update comment per AI review feedback

Changes in v2:
- The same fix approach was applied to bonding first, but could cause
  infinite recursion in bond_header_parse(). Eric spotted the issue and
  fixed it in:
  b7405dcf7385 ("bonding: prevent potential infinite loop in bond_header_parse()")
  After that fix landed, we continue with the same approach to fix team.

v1: https://lore.kernel.org/netdev/20260314062306.212765-1-jiayuan.chen@linux.dev/
v2: https://lore.kernel.org/netdev/20260317124606.157035-1-jiayuan.chen@linux.dev/

Jiayuan Chen (2):
  team: fix header_ops type confusion with non-Ethernet ports
  selftests: team: add non-Ethernet header_ops reproducer

 drivers/net/team/team_core.c                  | 65 ++++++++++++++++++-
 .../selftests/drivers/net/team/Makefile       |  1 +
 .../testing/selftests/drivers/net/team/config |  2 +
 .../drivers/net/team/non_ether_header_ops.sh  | 41 ++++++++++++
 4 files changed, 108 insertions(+), 1 deletion(-)
 create mode 100755 tools/testing/selftests/drivers/net/team/non_ether_header_ops.sh

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2.43.0