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can: usb: f81604: handle short interrupt urb messages properly

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If an interrupt urb is received that is not the correct length, properly
detect it and don't attempt to treat the data as valid.

Cc: Ji-Ze Hong (Peter Hong) <peter_hong@fintek.com.tw>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Vincent Mailhol <mailhol@kernel.org>
Cc: stable@kernel.org
Assisted-by: gkh_clanker_2000
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://patch.msgid.link/2026022331-opal-evaluator-a928@gregkh
Fixes: 88da174369 ("can: usb: f81604: add Fintek F81604 support")
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Greg Kroah-Hartman 2026-02-23 13:10:30 +01:00 • committed by Marc Kleine-Budde
parent 5eaad4f768
commit 7299b1b39a
1 changed files with 6 additions and 0 deletions
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6
drivers/net/can/usb/f81604.c
View file

@ -620,6 +620,12 @@ static void f81604_read_int_callback(struct urb *urb)
netdev_info(netdev, "%s: Int URB aborted: %pe\n", __func__,
ERR_PTR(urb->status));
if (urb->actual_length < sizeof(*data)) {
netdev_warn(netdev, "%s: short int URB: %u < %zu\n",
__func__, urb->actual_length, sizeof(*data));
goto resubmit_urb;
}
switch (urb->status) {
case 0: /* success */
break;