[Dnsmasq-discuss] Badly formatted "dhcp-boot=" line crashes dnsmsaq 2.85

Greg Wickham greg.wickham at kaust.edu.sa
Tue Aug 3 10:43:53 UTC 2021


Hi,

I inadvertently left a “tag:” off a “dhcp-boot=“ line which resulted in dnsmasq crashing.

This was the line that caused Dnsmasq to crash:

dhcp-boot=tag:ww3001,UEFI,/ipxe.efi,10.109.0.1,10.109.0.1

The line was supposed to be:

dhcp-boot=tag:ww3001,tag:UEFI,/ipxe.efi,10.109.0.1,10.109.0.1

We are using 2.82 in production where the crash doesn’t happen until a matching packet arrives.

But I did also try 2.85 before submitting this report and it crashes whilst parsing the configuration file:

# /tmp/dnsmasq-2.85/src/dnsmasq -k -p0
Segmentation fault
#

   -greg

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