6.6-stable review patch. If anyone has any objections, please let me know.
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From: Fedor Pchelkin pchelkin@ispras.ru
commit 9bd24927e3eeb85642c7baa3b28be8bea6c2a078 upstream.
If skb allocation fails, the pointer to struct can_frame is NULL. This is actually handled everywhere inside ctucan_err_interrupt() except for the only place.
Add the missed NULL check.
Found by Linux Verification Center (linuxtesting.org) with SVACE static analysis tool.
Fixes: 2dcb8e8782d8 ("can: ctucanfd: add support for CTU CAN FD open-source IP core - bus independent part.") Cc: stable@vger.kernel.org Signed-off-by: Fedor Pchelkin pchelkin@ispras.ru Acked-by: Pavel Pisa pisa@cmp.felk.cvut.cz Reviewed-by: Vincent Mailhol mailhol.vincent@wanadoo.fr Link: https://patch.msgid.link/20250114152138.139580-1-pchelkin@ispras.ru Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/can/ctucanfd/ctucanfd_base.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
--- a/drivers/net/can/ctucanfd/ctucanfd_base.c +++ b/drivers/net/can/ctucanfd/ctucanfd_base.c @@ -867,10 +867,12 @@ static void ctucan_err_interrupt(struct } break; case CAN_STATE_ERROR_ACTIVE: - cf->can_id |= CAN_ERR_CNT; - cf->data[1] = CAN_ERR_CRTL_ACTIVE; - cf->data[6] = bec.txerr; - cf->data[7] = bec.rxerr; + if (skb) { + cf->can_id |= CAN_ERR_CNT; + cf->data[1] = CAN_ERR_CRTL_ACTIVE; + cf->data[6] = bec.txerr; + cf->data[7] = bec.rxerr; + } break; default: netdev_warn(ndev, "unhandled error state (%d:%s)!\n",