diff options
| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2023-05-29 07:58:36 +0200 |
|---|---|---|
| committer | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2023-07-19 12:57:47 +0200 |
| commit | ea9ef6c2e001c5dc94bee35ebd1c8a98621cf7b8 (patch) | |
| tree | f50709feec7fbe95ab14e7f38834dc33d287a8d1 /drivers/media/usb | |
| parent | fae4280ece942b7c02be6d9bcce2873cdea32fe7 (diff) | |
media: dvb-usb: m920x: Fix a potential memory leak in m920x_i2c_xfer()
'read' is freed when it is known to be NULL, but not when a read error
occurs.
Revert the logic to avoid a small leak, should a m920x_read() call fail.
Fixes: a2ab06d7c4d6 ("media: m920x: don't use stack on USB reads")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Diffstat (limited to 'drivers/media/usb')
| -rw-r--r-- | drivers/media/usb/dvb-usb/m920x.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/media/usb/dvb-usb/m920x.c b/drivers/media/usb/dvb-usb/m920x.c index fea5bcf72a31..c88a202daf5f 100644 --- a/drivers/media/usb/dvb-usb/m920x.c +++ b/drivers/media/usb/dvb-usb/m920x.c @@ -277,7 +277,6 @@ static int m920x_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[], int nu char *read = kmalloc(1, GFP_KERNEL); if (!read) { ret = -ENOMEM; - kfree(read); goto unlock; } @@ -288,8 +287,10 @@ static int m920x_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[], int nu if ((ret = m920x_read(d->udev, M9206_I2C, 0x0, 0x20 | stop, - read, 1)) != 0) + read, 1)) != 0) { + kfree(read); goto unlock; + } msg[i].buf[j] = read[0]; } |