Package: ifmail Version: 2.14tx8.10-21 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 -Wl,--as-needed -g -O2 -fPIE -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -fPIE -pie -Wl,-z,relro version.o ifmail.o rfcmsg.o message.o mkftnhdr.o ifdbm.o batchrd.o areas.o msgflags.o nlindex.o nodecheck.o msgidbm.o attach.o charconv.o charconv_jp.o charconv_hz.o charconv_utf.o ../iflib/utlib.a -o ifmail -lgdbm -lgdbm_compat -lresolv error: conflicting function declarations "bsyname" old definition in module pktname file pktname.c line 182 char * (struct _faddr *addr, char flavor) new definition in module nodelock file nodelock.c line 21 char * (struct _faddr *) Makefile:88: recipe for target 'ifmail' failed make[2]: *** [ifmail] Error 64 As indeed the calls to bsyname only pass a single argument, stack underflow will necessarily occur here: http://sources.debian.net/src/ifmail/2.14tx8.10-21/iflib/pktname.c?hl=182#L182 Given the useless reads and writes of the parameter "flavor" this may remain without observable consequences in most cases, unless the attempted stack access actually causes an access to invalid memory. Best, Michael
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