Patch "i3c: Fix potential refcount leak in i3c_master_register_new_i3c_devs" has been added to the 6.6-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    i3c: Fix potential refcount leak in i3c_master_register_new_i3c_devs

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     i3c-fix-potential-refcount-leak-in-i3c_master_regist.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 90e6974e93c3eb58afd81fbe2e048e203c811ae1
Author: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
Date:   Thu Sep 21 16:24:10 2023 +0800

    i3c: Fix potential refcount leak in i3c_master_register_new_i3c_devs
    
    [ Upstream commit cab63f64887616e3c4e31cfd8103320be6ebc8d3 ]
    
    put_device() needs to be called on failure of device_register()
    to give up the reference initialized in it to avoid refcount leak.
    
    Fixes: 3a379bbcea0a ("i3c: Add core I3C infrastructure")
    Signed-off-by: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230921082410.25548-1-dinghao.liu@xxxxxxxxxx
    Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index 87283e4a46076..0e9ff5500a777 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -1525,9 +1525,11 @@ i3c_master_register_new_i3c_devs(struct i3c_master_controller *master)
 			desc->dev->dev.of_node = desc->boardinfo->of_node;
 
 		ret = device_register(&desc->dev->dev);
-		if (ret)
+		if (ret) {
 			dev_err(&master->dev,
 				"Failed to add I3C device (err = %d)\n", ret);
+			put_device(&desc->dev->dev);
+		}
 	}
 }