can: dev: __can_get_echo_skb(): Don't crash the kernel if can_priv::echo_skb is accessed out of bounds

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commit e7a6994d04 upstream.

If the "struct can_priv::echo_skb" is accessed out of bounds would lead
to a kernel crash. Better print a sensible warning message instead and
try to recover.

Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Marc Kleine-Budde 2018-10-31 14:05:26 +01:00 • committed by Greg Kroah-Hartman

parent cfc8ed9103

commit e3b8d98e37

1 changed files with 5 additions and 1 deletions

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drivers/net/can/dev.c

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