Package: bootp Version: 2.4.3-18 Usertags: goto-cc During a rebuild of all Debian packages in a clean sid chroot (using cowbuilder and pbuilder) the build failed with the following error. Please note that we use our research compiler tool-chain (using tools from the cbmc package), which permits extended reporting on type inconsistencies at link time.
[...] cc -o bootpd bootpd.o dovend.o readfile.o hash.o dumptab.o lookup.o getif.o hwaddr.o tzone.o report.o error: conflicting function declarations "insert_ip" old definition in module bootpd file dovend.h line 12 signed int (signed int, struct in_addr_list *, unsigned char **, signed int *) new definition in module dovend file dovend.c line 292 signed int (unsigned char tag, struct in_addr_list *iplist, unsigned char **dest, signed int *bytesleft) Makefile:145: recipe for target 'bootpd' failed make[1]: *** [bootpd] Error 64 Observe the type difference on the first parameter - this will result in undefined behaviour as only one of the bytes of an int will be used. Even if all values fit into the range of a single byte, at least big endian systems will pick from the wrong end of the byte range, resulting in arbitrary values being passed. Best, Michael
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