6.6-stable review patch. If anyone has any objections, please let me know.
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From: Frank Li Frank.Li@nxp.com
[ Upstream commit 9d4f219807d5ac11fb1d596e4ddb09336b040067 ]
In `i3c_master_register`, a possible refcount inconsistency has been identified, causing possible resource leak.
Function `of_node_get` increases the refcount of `parent->of_node`. If function `i3c_bus_init` fails, the function returns immediately without a corresponding decrease, resulting in an inconsistent refcounter.
Move call i3c_bus_init() after device_initialize() to let callback i3c_masterdev_release() release of_node.
Reported-by: Shuhao Fu sfual@cse.ust.hk Closes: https://lore.kernel.org/linux-i3c/aO2tjp_FsV_WohPG@osx.local/T/#m2c05a982bee... Fixes: 3a379bbcea0a ("i3c: Add core I3C infrastructure") Signed-off-by: Frank Li Frank.Li@nxp.com Link: https://patch.msgid.link/20251016143814.2551256-1-Frank.Li@nxp.com Signed-off-by: Alexandre Belloni alexandre.belloni@bootlin.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/i3c/master.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index 29e591bcc0646..060f70e4d52d7 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -2768,10 +2768,6 @@ int i3c_master_register(struct i3c_master_controller *master, INIT_LIST_HEAD(&master->boardinfo.i2c); INIT_LIST_HEAD(&master->boardinfo.i3c);
- ret = i3c_bus_init(i3cbus, master->dev.of_node); - if (ret) - return ret; - device_initialize(&master->dev); dev_set_name(&master->dev, "i3c-%d", i3cbus->id);
@@ -2779,6 +2775,10 @@ int i3c_master_register(struct i3c_master_controller *master, master->dev.coherent_dma_mask = parent->coherent_dma_mask; master->dev.dma_parms = parent->dma_parms;
+ ret = i3c_bus_init(i3cbus, master->dev.of_node); + if (ret) + goto err_put_dev; + ret = of_populate_i3c_bus(master); if (ret) goto err_put_dev;