segfault in objcopy building sbsigntool

[Mathieu Trudel-Lapierre]

objcopy segfaults on i386, with the latest libc6 revisions (see below).

Works with 2.15-0ubuntu10 in a schroot (new precise chroot without updates)
Works with 2.15-0ubuntu10.4 (last sbsigntool backport used that)
Fails with 2.15-0ubuntu10.13 (in precise schroot)
Fails with 2.15-0ubuntu10.14 (in precise schroot).
Fails with 2.15-0ubuntu10.15 (in precise schroot).

Excerpt from the logs on my PPA [1][2]:

make test-x86_64.pecoff test-i386.pecoff test-wrapper.sh \
   private-key.rsa public-cert.pem
make[3]: Entering directory `/«PKGBUILDDIR»/tests'
gcc -m64 -D_FORTIFY_SOURCE=2 -c -o test-x86_64.o test.S
gcc -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -Werror=format-security -nostdlib -T ./test-x86_64.lds -o test-x86_64.elf test-x86_64.o
objcopy -j .text -j .sdata -j .data \
  -j .dynamic -j .dynsym -j .rel \
  -j .rela -j .reloc \
  --target=efi-app-x86-64 test-x86_64.elf test-x86_64.pecoff
make[3]: *** [test-x86_64.pecoff] Segmentation fault (core dumped)
make[3]: *** Deleting file `test-x86_64.pecoff'
rm test-x86_64.elf test-x86_64.o
make[3]: Leaving directory `/«PKGBUILDDIR»/tests'
make[2]: *** [check-am] Error 2
make[2]: Leaving directory `/«PKGBUILDDIR»/tests'
make[1]: *** [check-recursive] Error 1
make[1]: Leaving directory `/«PKGBUILDDIR»'
dh_auto_test: make -j1 check returned exit code 2
make: *** [build] Error 29
dpkg-buildpackage: error: debian/rules build gave error exit status 2

[1] https://launchpad.net/~cyphermox/+archive/ubuntu/efi/+build/9800712
[2] https://launchpadlibrarian.net/261818326/buildlog_ubuntu-precise-i386.sbsigntool_0.6-0ubuntu4~12.04.2_BUILDING.txt.gz

[Mathieu Trudel-Lapierre (cyphermox)]

This is blocking a backport of sbsigntool, which is required by shim-signed; since we're working on backporting all the latest shim/grub Secure Boot magic all the way to precise.