Hello dnsmasq experts, There is a runtime error in the latest version of dnsmasq. If we compile dnsmasq with UBSan. and send it with
``` echo -n 'c97b01000001000000000000047465737403636f6d0000020001' | xxd -r -p | nc -u target_addr target_port ``` And then we'll get a error message: ``` hash-questions.c:168:21: runtime error: left shift of 128 by 24 places cannot be represented in type 'int' #0 0x6f0252 in sha256_transform /root/dnsmasq/src/hash-questions.c:168:21 #1 0x6eea82 in sha256_final /root/dnsmasq/src/hash-questions.c:267:3 #2 0x6eea82 in hash_questions /root/dnsmasq/src/hash-questions.c:127:3 #3 0x56d2e9 in forward_query /root/dnsmasq/src/forward.c:179:16 #4 0x580327 in receive_query /root/dnsmasq/src/forward.c:1877:12 #5 0x5c977f in check_dns_listeners /root/dnsmasq/src/dnsmasq.c:1838:2 #6 0x5c0c95 in main /root/dnsmasq/src/dnsmasq.c:1259:7 #7 0x7f3e2ec1dd8f (/lib/x86_64-linux-gnu/libc.so.6+0x29d8f) #8 0x7f3e2ec1de3f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e3f) #9 0x4206d4 in _start (/root/dnsmasq/src/dnsmasq+0x4206d4) ``` here is my conf and cli args: ``` no-daemon no-resolv interface=lo bind-interfaces no-hosts server=/baidu.com/223.5.5.5 server=/thekelleys.org.uk/114.114.114.114 address=/test.com/233.233.233.233 cache-size=150 ``` ``` dnsmasq -p 5355 -d -N -q -R -h -n -y -C config.conf ``` Kind regards, Feifan Wu _______________________________________________ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss
