fix null pointer dereference for INFORM messages

openwrt / odhcpd

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GNU General Public License v2.0

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Closed robekl closed 1 year ago

robekl commented 1 year ago

The variable a was unset when an INFORM message was received, causing a segfault. This checks a before dereferencing.

Checked by running locally and sending a DHCP INFORM message and verifying that the process does not segfault.

robekl commented 1 year ago

@dedeckeh Please review

dedeckeh commented 1 year ago

Patch pushed to master; thx