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can: gs_usb: gs_make_candev(): fix memory leak for devices with extended bit timing configuration

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Some CAN-FD capable devices offer extended bit timing information for
the data bit timing. The information must be read with an USB control
message. The memory for this message is allocated but not free()ed (in
the non error case). This patch adds the missing free.

Fixes: 6679f4c5e5 ("can: gs_usb: add extended bt_const feature")
Link: https://lore.kernel.org/all/20220329193450.659726-1-mkl@pengutronix.de
Reported-by: syzbot+4d0ae90a195b269f102d@syzkaller.appspotmail.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Marc Kleine-Budde 2022-03-29 21:29:43 +02:00
parent 136bed0bfd
commit 50d34a0d15
1 changed files with 2 additions and 0 deletions
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2
drivers/net/can/usb/gs_usb.c
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@ -1092,6 +1092,8 @@ static struct gs_can *gs_make_candev(unsigned int channel,
dev->data_bt_const.brp_inc = le32_to_cpu(bt_const_extended->dbrp_inc);
dev->can.data_bittiming_const = &dev->data_bt_const;
kfree(bt_const_extended);
}
SET_NETDEV_DEV(netdev, &intf->dev);