This is a note to let you know that I've just added the patch titled media: si470x-i2c: fix possible memory leak in si470x_i2c_probe() to the 5.4-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: media-si470x-i2c-fix-possible-memory-leak-in-si470x_.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 578b63ccd7bd4f04b2953b7a02351d36a8fec00e Author: Yang Yingliang <yangyingliang@xxxxxxxxxx> Date: Fri Oct 15 11:58:55 2021 +0200 media: si470x-i2c: fix possible memory leak in si470x_i2c_probe() [ Upstream commit ef054e345ed8c79ce1121a3599b5a2dfd78e57a0 ] n the 'radio->hdl.error' error handling, ctrl handler allocated by v4l2_ctrl_new_std() does not released, and caused memory leak as follows: unreferenced object 0xffff888033d54200 (size 256): comm "i2c-si470x-19", pid 909, jiffies 4294914203 (age 8.072s) hex dump (first 32 bytes): e8 69 11 03 80 88 ff ff 00 46 d5 33 80 88 ff ff .i.......F.3.... 10 42 d5 33 80 88 ff ff 10 42 d5 33 80 88 ff ff .B.3.....B.3.... backtrace: [<00000000086bd4ed>] __kmalloc_node+0x1eb/0x360 [<00000000bdb68871>] kvmalloc_node+0x66/0x120 [<00000000fac74e4c>] v4l2_ctrl_new+0x7b9/0x1c60 [videodev] [<00000000693bf940>] v4l2_ctrl_new_std+0x19b/0x270 [videodev] [<00000000c0cb91bc>] si470x_i2c_probe+0x2d3/0x9a0 [radio_si470x_i2c] [<0000000056a6f01f>] i2c_device_probe+0x4d8/0xbe0 Fix the error handling path to avoid memory leak. Reported-by: Hulk Robot <hulkci@xxxxxxxxxx> Fixes: 8c081b6f9a9b ("media: radio: Critical v4l2 registration...") Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx> Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/media/radio/si470x/radio-si470x-i2c.c b/drivers/media/radio/si470x/radio-si470x-i2c.c index a972c0705ac79..76d39e2e87706 100644 --- a/drivers/media/radio/si470x/radio-si470x-i2c.c +++ b/drivers/media/radio/si470x/radio-si470x-i2c.c @@ -368,7 +368,7 @@ static int si470x_i2c_probe(struct i2c_client *client) if (radio->hdl.error) { retval = radio->hdl.error; dev_err(&client->dev, "couldn't register control\n"); - goto err_dev; + goto err_all; } /* video device initialization */ @@ -463,7 +463,6 @@ static int si470x_i2c_probe(struct i2c_client *client) return 0; err_all: v4l2_ctrl_handler_free(&radio->hdl); -err_dev: v4l2_device_unregister(&radio->v4l2_dev); err_initial: return retval;