can: fix handling of unmodifiable configuration options fix
With upstream commit bb208f144c
(can: fix handling of unmodifiable
configuration options) a new can_validate() function was introduced.
When invoking 'ip link set can0 type can' without any configuration data
can_validate() tries to validate the content without taking into account that
there's totally no content. This patch adds a check for missing content.
Reported-by: ajneu <ajneu1@gmail.com>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
parent
acd43fe85b
commit
bce271f255
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@ -798,6 +798,9 @@ static int can_validate(struct nlattr *tb[], struct nlattr *data[])
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* - control mode with CAN_CTRLMODE_FD set
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*/
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if (!data)
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return 0;
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if (data[IFLA_CAN_CTRLMODE]) {
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struct can_ctrlmode *cm = nla_data(data[IFLA_CAN_CTRLMODE]);
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