| Message ID | 1881e72f963ec25e35b34f3a0b4f3962681eb7ca.1685339897.git.christophe.jaillet@wanadoo.fr (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | media: dvb-usb: m920x: Fix a potential memory leak in m920x_i2c_xfer() | expand |
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]; }
'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> --- drivers/media/usb/dvb-usb/m920x.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)