+ rapidio-fix-an-api-misues-when-rio_add_net-fails.patch added to mm-hotfixes-unstable branch

+ rapidio-fix-an-api-misues-when-rio_add_net-fails.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: rapidio: fix an API misues when rio_add_net() fails
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     rapidio-fix-an-api-misues-when-rio_add_net-fails.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/rapidio-fix-an-api-misues-when-rio_add_net-fails.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Haoxiang Li <haoxiang_li2024@163.com>
Subject: rapidio: fix an API misues when rio_add_net() fails
Date: Thu, 27 Feb 2025 15:34:09 +0800

rio_add_net() calls device_register() and fails when device_register()
fails.  Thus, put_device() should be used rather than kfree().  Add
"mport->net = NULL;" to avoid a use after free issue.

Link: https://lkml.kernel.org/r/20250227073409.3696854-1-haoxiang_li2024@163.com
Fixes: e8de370188d0 ("rapidio: add mport char device driver")
Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/rapidio/devices/rio_mport_cdev.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/rapidio/devices/rio_mport_cdev.c~rapidio-fix-an-api-misues-when-rio_add_net-fails
+++ a/drivers/rapidio/devices/rio_mport_cdev.c
@@ -1742,7 +1742,8 @@ static int rio_mport_add_riodev(struct m
 		err = rio_add_net(net);
 		if (err) {
 			rmcd_debug(RDEV, "failed to register net, err=%d", err);
-			kfree(net);
+			put_device(&net->dev);
+			mport->net = NULL;
 			goto cleanup;
 		}
 	}
_

Patches currently in -mm which might be from haoxiang_li2024@163.com are

m68k-sun3-add-check-for-__pgd_alloc.patch
rapidio-fix-an-api-misues-when-rio_add_net-fails.patch