5.4-stable review patch. If anyone has any objections, please let me know.
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From: Qasim Ijaz qasdev00@gmail.com
commit 5ae416c5b1e2e816aee7b3fc8347adf70afabb4c upstream.
During wacom_initialize_remotes() a fifo buffer is allocated with kfifo_alloc() and later a cleanup action is registered during devm_add_action_or_reset() to clean it up.
However if the code fails to create a kobject and register it with sysfs the code simply returns -ENOMEM before the cleanup action is registered leading to a memory leak.
Fix this by ensuring the fifo is freed when the kobject creation and registration process fails.
Fixes: 83e6b40e2de6 ("HID: wacom: EKR: have the wacom resources dynamically allocated") Reviewed-by: Ping Cheng ping.cheng@wacom.com Cc: stable@vger.kernel.org Signed-off-by: Qasim Ijaz qasdev00@gmail.com Signed-off-by: Jiri Kosina jkosina@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/hid/wacom_sys.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/hid/wacom_sys.c +++ b/drivers/hid/wacom_sys.c @@ -2020,8 +2020,10 @@ static int wacom_initialize_remotes(stru
remote->remote_dir = kobject_create_and_add("wacom_remote", &wacom->hdev->dev.kobj); - if (!remote->remote_dir) + if (!remote->remote_dir) { + kfifo_free(&remote->remote_fifo); return -ENOMEM; + }
error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);