[PATCH net v3 0/2] netconsole: fix target enable race and configfs read locking

[Gustavo Luiz Duarte <gustavold@gmail.com>]

While looking into the sashiko report about local_ip_show() and
remote_ip_show() missing proper locking [1], I noticed a couple other
places that need locking: patch 1/2 fixes a null-ptr-deref when enabling
a target races against a NETDEV_UNREGISTER event, and patch 2/2 fixes a
use-after-free when the local_mac_show() callback races against a
NETDEV_UNREGISTER event.

[1] https://netdev-ai.bots.linux.dev/sashiko/#/patchset/20260814-netcons_ipv6-v3-7-bc0915e8c75f@gmail.com

Signed-off-by: Gustavo Luiz Duarte <gustavold@gmail.com>
---
Changes in v3:
- Use target_list_lock instead of RTNL in local_mac_show.
- Link to v2: https://patch.msgid.link/20261006-netcons-fixes-v2-0-ca652d55fd4a@gmail.com

Changes in v2:
- Resending for the 'net' tree.
- Link to v1: https://patch.msgid.link/20260928-netcons-fixes-v1-0-bb5ffe5e698a@gmail.com

To: Breno Leitao <leitao@debian.org>
To: Andrew Lunn <andrew+netdev@lunn.ch>
To: "David S. Miller" <davem@davemloft.net>
To: Eric Dumazet <edumazet@kernel.org>
To: Jakub Kicinski <kuba@kernel.org>
To: Paolo Abeni <pabeni@redhat.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org

---
Gustavo Luiz Duarte (2):
      netconsole: finish enabling the target before releasing RTNL
      netconsole: read np.dev under target_list_lock in local_mac_show()

 drivers/net/netconsole.c | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)
---
base-commit: af32da41b0327b9c6a37856ba82b6760d6c8d10e
change-id: 20260925-netcons-fixes-93a3e14326b5

Best regards,
--  
Gustavo Luiz Duarte <gustavold@gmail.com>