6.6-stable review patch. If anyone has any objections, please let me know.
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From: Victoria Votokina Victoria.Votokina@kaspersky.com
commit a8cc9e5fcb0e2eef21513a4fec888f5712cb8162 upstream.
The early error path in hdm_probe() can jump to err_free_mdev before &mdev->dev has been initialized with device_initialize(). Calling put_device(&mdev->dev) there triggers a device core WARN and ends up invoking kref_put(&kobj->kref, kobject_release) on an uninitialized kobject.
In this path the private struct was only kmalloc'ed and the intended release is effectively kfree(mdev) anyway, so free it directly instead of calling put_device() on an uninitialized device.
This removes the WARNING and fixes the pre-initialization error path.
Fixes: 97a6f772f36b ("drivers: most: add USB adapter driver") Cc: stable stable@kernel.org Signed-off-by: Victoria Votokina Victoria.Votokina@kaspersky.com Link: https://patch.msgid.link/20251010105241.4087114-3-Victoria.Votokina@kaspersk... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/most/most_usb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/most/most_usb.c +++ b/drivers/most/most_usb.c @@ -1097,7 +1097,7 @@ err_free_cap: err_free_conf: kfree(mdev->conf); err_free_mdev: - put_device(&mdev->dev); + kfree(mdev); return ret; }