http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47656
Summary: libgo.so has writable executable stack
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: go
AssignedTo: i...@airs.com
ReportedBy: dirtye...@gentoo.org
For security reasons our package manager scans ELF files being installed for
writable executable stacks using scanelf (pax-utils). libgo.so triggers this
warning.
$ scanelf -qe
/usr/lib/gcc/x86_64-unknown-linux-gnu/4.6.0-pre9999/libgo.so.0.0.0
RWX --- --- /usr/lib/gcc/x86_64-unknown-linux-gnu/4.6.0-pre9999/libgo.so.0.0.0
$ eu-readelf -S
/usr/lib/gcc/x86_64-unknown-linux-gnu/4.6.0-pre9999/libgo.so.0.0.0
There are 31 section headers, starting at offset 0x8975e0:
Section Headers:
[Nr] Name Type Addr Off Size ES
Flags Lk Inf Al
[ 0] NULL 0000000000000000 00000000 00000000 0
0 0 0
[ 1] .hash HASH 0000000000000200 00000200 00014468 4 A
3 0 8
[ 2] .gnu.hash GNU_HASH 0000000000014668 00014668 000181e4 0 A
3 0 8
[ 3] .dynsym DYNSYM 000000000002c850 0002c850 000498a8 24 A
4 3 8
[ 4] .dynstr STRTAB 00000000000760f8 000760f8 000b1074 0 A
0 0 1
[ 5] .gnu.version GNU_versym 000000000012716c 0012716c 0000620e 2 A
3 0 2
[ 6] .gnu.version_r GNU_verneed 000000000012d380 0012d380 000000e0 0 A
4 4 8
[ 7] .rela.dyn RELA 000000000012d460 0012d460 002900b8 24 A
3 0 8
[ 8] .rela.plt RELA 00000000003bd518 003bd518 0000edd8 24 A
3 10 8
[ 9] .init PROGBITS 00000000003cc2f0 003cc2f0 00000018 0 AX
0 0 4
[10] .plt PROGBITS 00000000003cc308 003cc308 00009ea0 16 AX
0 0 4
[11] .text PROGBITS 00000000003d61b0 003d61b0 001c5dbc 0 AX
0 0 16
[12] .fini PROGBITS 000000000059bf6c 0059bf6c 0000000e 0 AX
0 0 4
[13] .rodata PROGBITS 000000000059bf80 0059bf80 000607e2 0 A
0 0 32
[14] .eh_frame_hdr PROGBITS 00000000005fc764 005fc764 0000b44c 0 A
0 0 4
[15] .eh_frame PROGBITS 0000000000607bb0 00607bb0 0003b324 0 A
0 0 8
[16] .gcc_except_table PROGBITS 0000000000642ed4 00642ed4 000027d5 0 A
0 0 4
[17] .tdata PROGBITS 0000000000846020 00646020 00000008 0
WAT 0 0 8
[18] .tbss NOBITS 0000000000846028 00646028 000000d0 0
WAT 0 0 8
[19] .ctors PROGBITS 0000000000846028 00646028 00000020 0 WA
0 0 8
[20] .dtors PROGBITS 0000000000846048 00646048 00000010 0 WA
0 0 8
[21] .jcr PROGBITS 0000000000846058 00646058 00000008 0 WA
0 0 8
[22] .data.rel.ro PROGBITS 0000000000846060 00646060 00122e88 0 WA
0 0 32
[23] .dynamic DYNAMIC 0000000000968ee8 00768ee8 000001e0 16 WA
4 0 8
[24] .got PROGBITS 00000000009690c8 007690c8 00002f10 8 WA
0 0 8
[25] .got.plt PROGBITS 000000000096bfe8 0076bfe8 00004f60 8 WA
0 0 8
[26] .data PROGBITS 0000000000970f60 00770f60 00084390 0 WA
0 0 32
[27] .bss NOBITS 00000000009f5300 007f52f0 00234bb8 0 WA
0 0 32
[28] .go_export PROGBITS 0000000000000000 007f52f0 000a21cf 0
0 0 1
[29] .gnu_debuglink PROGBITS 0000000000000000 008974bf 0000001c 0
0 0 1
[30] .shstrtab STRTAB 0000000000000000 008974db 00000102 0
0 0 1
$ gcc -v
Using built-in specs.
COLLECT_GCC=/usr/x86_64-unknown-linux-gnu/gcc-bin/4.6.0-pre9999/gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0-pre9999/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with:
/var/tmp/portage/sys-devel/gcc-4.6.0_pre9999/work/gcc-4.6.0-9999/configure
--prefix=/usr --bindir=/usr/x86_64-unknown-linux-gnu/gcc-bin/4.6.0-pre9999
--includedir=/usr/lib/gcc/x86_64-unknown-linux-gnu/4.6.0-pre9999/include
--datadir=/usr/share/gcc-data/x86_64-unknown-linux-gnu/4.6.0-pre9999
--mandir=/usr/share/gcc-data/x86_64-unknown-linux-gnu/4.6.0-pre9999/man
--infodir=/usr/share/gcc-data/x86_64-unknown-linux-gnu/4.6.0-pre9999/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-unknown-linux-gnu/4.6.0-pre9999/include/g++-v4
--host=x86_64-unknown-linux-gnu --build=x86_64-unknown-linux-gnu
--disable-altivec --disable-fixed-point --with-ppl --with-cloog
--disable-ppl-version-check --with-cloog-include=/usr/include/cloog-ppl
--enable-lto --disable-nls --with-system-zlib --disable-werror
--enable-secureplt --enable-multilib --disable-libmudflap --disable-libssp
--enable-libgomp --enable-cld
--with-python-dir=/share/gcc-data/x86_64-unknown-linux-gnu/4.6.0-pre9999/python
--enable-checking=release --disable-libgcj --enable-languages=c,c++,go
--enable-shared --enable-threads=posix --enable-__cxa_atexit
--enable-clocale=gnu --with-bugurl=http://bugs.gentoo.org/
--with-pkgversion='Gentoo SVN'
Thread model: posix
gcc version 4.6.0-pre9999 20110209 (experimental) rev. 169960 (Gentoo SVN)
