Prompted by recent security advisories I did a 'make buildworld'
on a fresh svn checkout, only to find out that it seems the 'exec'
mount flag on /usr/src is still required for a successful build.
This wasn't so for 10.2, and I hope it won't become a requirement
in 10.3 - or at least it should be clearly documented in release notes.
Mark
On 2015-12-07 16:35, Mark Martinec wrote:
So, is this a new state of affairs that /usr/src file system
needs to be mounted exec in order for buildworld to succeed,
or is this an unintended change and I should file a bug report?
Mark
On 2015-11-26 19:44, Miroslav Lachman wrote:
Mark Martinec wrote on 11/26/2015 19:31:
Up to about a week ago building world on FreeBSD 10.2-STABLE went
just fine. Today after svn update the build fails:
# make buildworld
[...]
CC='cc ' mkdep -f .depend.getprotoent_test -a
-I/usr/src/lib/libc/tests/net -I/usr/src/lib/libnetbsd
-I/usr/src/contrib/netbsd-tests -std=gnu99
/usr/src/contrib/netbsd-tests/lib/libc/net/t_getprotoent.c
echo getprotoent_test: /usr/obj/usr/src/tmp/usr/lib/libc.a
/usr/obj/usr/src/tmp/usr/lib/private/libatf-c.a >>
.depend.getprotoent_test
(cd /usr/src/lib/libc/tests/net && make -f
/usr/src/lib/libc/tests/net/Makefile _RECURSING_PROGS= SUBDIR=
PROG=ether_aton_test DEPENDFILE=.depend.ether_aton_test
.MAKE.DEPENDFILE=.depend.ether_aton_test depend)
/usr/src/contrib/netbsd-tests/lib/libc/net/gen_ether_subr
/usr/src/sys/net/if_ethersubr.c aton_ether_subr.c
make[7]:
exec(/usr/src/contrib/netbsd-tests/lib/libc/net/gen_ether_subr)
failed (Permission denied)
*** Error code 1
Stop.
make[7]: stopped in /usr/src/lib/libc/tests/net
*** Error code 1
It turns out that our file system /usr/src had an "exec" flag
turned off, so now running a command:
/usr/src/contrib/netbsd-tests/lib/libc/net/gen_ether_subr
fails with "Permission denied".
It would be valuable if building a system on an exec-protected
src file system would continue to be possible.
Not sure if the
/usr/src/contrib/netbsd-tests/lib/libc/net/gen_ether_subr
is the only such new command breaking the build. Anyway, a simple
workaround is to run shell from a command line instead of as a
shebang, i.e.:
# /bin/sh
/usr/src/contrib/netbsd-tests/lib/libc/net/gen_ether_subr
instead of:
# /usr/src/contrib/netbsd-tests/lib/libc/net/gen_ether_subr
I was puzzled by similar thing years ago. I was using /var/db and /tmp
mounted with noexec. And then there was some changes. Ports need
/var/db with exec because of some script in /var/db/pkg and /tmp must
have exec too for buildworld or installworld (I don't remember it
well, now I always do mount -u -o current,exec /tmp before build +
install world and kernel)
Anyway - it would be better to not have these partitions mounted with
exec.
Miroslav Lachman
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