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Mon, 12 Oct 2026 09:42:17 -0700 (PDT) From: Gustavo Luiz Duarte Subject: [PATCH net v3 0/2] netconsole: fix target enable race and configfs read locking Date: Mon, 12 Oct 2026 17:41:56 +0100 Message-Id: <20261012-netcons-fixes-v3-0-1aac85ed7665@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/12Nyw7CIBBFf6VhLYZHIa0r/8O4ADq0GC0GKtE0/ XcpGhO7vDPn3DujCMFBRIdqRgGSi86POfBdhcygxh6w63JGjDBJWibwCJPxY8TWPSHilisOtOZ MaoGycw9QHlk5oYyi8+cYH/oCZlqbVmxwcfLhVVYTLfB3oNkMJIoJ1lpYCwJk26hjf1Puujf+V roT+9mUELm1WbaNkoJ1Qtiu/rOXZXkDwmhShP8AAAA= X-Change-ID: 20260925-netcons-fixes-93a3e14326b5 To: Breno Leitao , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Stephen Hemminger Cc: Gustavo Luiz Duarte , netdev@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.15.2 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 --- 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 To: Andrew Lunn To: "David S. Miller" To: Eric Dumazet To: Jakub Kicinski To: Paolo Abeni To: Stephen Hemminger 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