net: lwip: check if network device is available in do_dhcp

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eth_get_dev() returns NULL if no network device is available.
Not checking the return value leads to a crash when the device
pointer is dereferenced.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
(cherry picked from commit d701c6ab42)

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This commit is contained in:

Heinrich Schuchardt

2024-12-05 20:17:36 +01:00

committed by Simon Glass

parent 7afa4e9a30

commit e1bf38e096

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