+++ This bug was initially created as a clone of Bug #484672 +++ When I ran "make check" for glibc in CVS as of 2009-02-09, I saw many random failures ranging from segmentation fault to illegal instruction under kernel 2.6.27.12-170.2.5.fc10.x86_64 on Fedora 10/Intel Q6700. I have no problems with kernel 2.6.27.9-73.fc9.x86_64 on Fedora 9.
Booting kernel 2.6.27.9-159.fc10.x86_64 fixes random failures in "make check".
Can you post some of the errors?
/bin/sh: line 1: 22524 Segmentation fault GCONV_PATH=/export/build/gnu/glibc/build-x86_64-linux/iconvdata LC_ALL=C /export/build/gnu/glibc/build-x86_64-linux/elf/ld-linux-x86-64.so.2 --library-path /export/build/gnu/glibc/build-x86_64-linux:/export/build/gnu/glibc/build-x86_64-linux/math:/export/build/gnu/glibc/build-x86_64-linux/elf:/export/build/gnu/glibc/build-x86_64-linux/dlfcn:/export/build/gnu/glibc/build-x86_64-linux/nss:/export/build/gnu/glibc/build-x86_64-linux/nis:/export/build/gnu/glibc/build-x86_64-linux/rt:/export/build/gnu/glibc/build-x86_64-linux/resolv:/export/build/gnu/glibc/build-x86_64-linux/crypt:/export/build/gnu/glibc/build-x86_64-linux/nptl /export/build/gnu/glibc/build-x86_64-linux/iconv/tst-iconv2 > /export/build/gnu/glibc/build-x86_64-linux/iconv/tst-iconv2.out /bin/sh: line 1: 22670 Illegal instruction GCONV_PATH=/export/build/gnu/glibc/build-x86_64-linux/iconvdata LC_ALL=C /export/build/gnu/glibc/build-x86_64-linux/elf/ld-linux-x86-64.so.2 --library-path /export/build/gnu/glibc/build-x86_64-linux:/export/build/gnu/glibc/build-x86_64-linux/math:/export/build/gnu/glibc/build-x86_64-linux/elf:/export/build/gnu/glibc/build-x86_64-linux/dlfcn:/export/build/gnu/glibc/build-x86_64-linux/nss:/export/build/gnu/glibc/build-x86_64-linux/nis:/export/build/gnu/glibc/build-x86_64-linux/rt:/export/build/gnu/glibc/build-x86_64-linux/resolv:/export/build/gnu/glibc/build-x86_64-linux/crypt:/export/build/gnu/glibc/build-x86_64-linux/nptl /export/build/gnu/glibc/build-x86_64-linux/locale/tst-C-locale > /export/build/gnu/glibc/build-x86_64-linux/locale/tst-C-locale.out /bin/sh: line 1: 30632 Segmentation fault GCONV_PATH=/export/build/gnu/glibc/build-x86_64-linux/iconvdata LC_ALL=C /export/build/gnu/glibc/build-x86_64-linux/elf/ld-linux-x86-64.so.2 --library-path /export/build/gnu/glibc/build-x86_64-linux:/export/build/gnu/glibc/build-x86_64-linux/math:/export/build/gnu/glibc/build-x86_64-linux/elf:/export/build/gnu/glibc/build-x86_64-linux/dlfcn:/export/build/gnu/glibc/build-x86_64-linux/nss:/export/build/gnu/glibc/build-x86_64-linux/nis:/export/build/gnu/glibc/build-x86_64-linux/rt:/export/build/gnu/glibc/build-x86_64-linux/resolv:/export/build/gnu/glibc/build-x86_64-linux/crypt:/export/build/gnu/glibc/build-x86_64-linux/nptl /export/build/gnu/glibc/build-x86_64-linux/math/test-ildoubl > /export/build/gnu/glibc/build-x86_64-linux/math/test-ildoubl.out /bin/sh: line 1: 30692 Segmentation fault GCONV_PATH=/export/build/gnu/glibc/build-x86_64-linux/iconvdata LC_ALL=C /export/build/gnu/glibc/build-x86_64-linux/elf/ld-linux-x86-64.so.2 --library-path /export/build/gnu/glibc/build-x86_64-linux:/export/build/gnu/glibc/build-x86_64-linux/math:/export/build/gnu/glibc/build-x86_64-linux/elf:/export/build/gnu/glibc/build-x86_64-linux/dlfcn:/export/build/gnu/glibc/build-x86_64-linux/nss:/export/build/gnu/glibc/build-x86_64-linux/nis:/export/build/gnu/glibc/build-x86_64-linux/rt:/export/build/gnu/glibc/build-x86_64-linux/resolv:/export/build/gnu/glibc/build-x86_64-linux/crypt:/export/build/gnu/glibc/build-x86_64-linux/nptl /export/build/gnu/glibc/build-x86_64-linux/setjmp/tst-setjmp > /export/build/gnu/glibc/build-x86_64-linux/setjmp/tst-setjmp.out /bin/sh: line 1: 5647 Segmentation fault GCONV_PATH=/export/build/gnu/glibc/build-x86_64-linux/iconvdata LC_ALL=C /export/build/gnu/glibc/build-x86_64-linux/elf/ld-linux-x86-64.so.2 --library-path /export/build/gnu/glibc/build-x86_64-linux:/export/build/gnu/glibc/build-x86_64-linux/math:/export/build/gnu/glibc/build-x86_64-linux/elf:/export/build/gnu/glibc/build-x86_64-linux/dlfcn:/export/build/gnu/glibc/build-x86_64-linux/nss:/export/build/gnu/glibc/build-x86_64-linux/nis:/export/build/gnu/glibc/build-x86_64-linux/rt:/export/build/gnu/glibc/build-x86_64-linux/resolv:/export/build/gnu/glibc/build-x86_64-linux/crypt:/export/build/gnu/glibc/build-x86_64-linux/nptl /export/build/gnu/glibc/build-x86_64-linux/io/test-stat2 Makefile . /export/build/gnu/glibc/build-x86_64-linux/io/test-stat2 > /export/build/gnu/glibc/build-x86_64-linux/io/test-stat2.out /bin/sh: line 1: 8971 Segmentation fault GCONV_PATH=/export/build/gnu/glibc/build-x86_64-linux/iconvdata LC_ALL=C /export/build/gnu/glibc/build-x86_64-linux/elf/ld-linux-x86-64.so.2 --library-path /export/build/gnu/glibc/build-x86_64-linux:/export/build/gnu/glibc/build-x86_64-linux/math:/export/build/gnu/glibc/build-x86_64-linux/elf:/export/build/gnu/glibc/build-x86_64-linux/dlfcn:/export/build/gnu/glibc/build-x86_64-linux/nss:/export/build/gnu/glibc/build-x86_64-linux/nis:/export/build/gnu/glibc/build-x86_64-linux/rt:/export/build/gnu/glibc/build-x86_64-linux/resolv:/export/build/gnu/glibc/build-x86_64-linux/crypt:/export/build/gnu/glibc/build-x86_64-linux/nptl /export/build/gnu/glibc/build-x86_64-linux/nptl/tst-cond19 > /export/build/gnu/glibc/build-x86_64-linux/nptl/tst-cond19.out /bin/sh: line 1: 13057 Segmentation fault GCONV_PATH=/export/build/gnu/glibc/build-x86_64-linux/iconvdata LC_ALL=C /export/build/gnu/glibc/build-x86_64-linux/elf/ld-linux-x86-64.so.2 --library-path /export/build/gnu/glibc/build-x86_64-linux:/export/build/gnu/glibc/build-x86_64-linux/math:/export/build/gnu/glibc/build-x86_64-linux/elf:/export/build/gnu/glibc/build-x86_64-linux/dlfcn:/export/build/gnu/glibc/build-x86_64-linux/nss:/export/build/gnu/glibc/build-x86_64-linux/nis:/export/build/gnu/glibc/build-x86_64-linux/rt:/export/build/gnu/glibc/build-x86_64-linux/resolv:/export/build/gnu/glibc/build-x86_64-linux/crypt:/export/build/gnu/glibc/build-x86_64-linux/nptl /export/build/gnu/glibc/build-x86_64-linux/nptl/tst-tls3 > /export/build/gnu/glibc/build-x86_64-linux/nptl/tst-tls3.out /bin/sh: line 1: 15909 Segmentation fault GCONV_PATH=/export/build/gnu/glibc/build-x86_64-linux/iconvdata LC_ALL=C /export/build/gnu/glibc/build-x86_64-linux/elf/ld-linux-x86-64.so.2 --library-path /export/build/gnu/glibc/build-x86_64-linux:/export/build/gnu/glibc/build-x86_64-linux/math:/export/build/gnu/glibc/build-x86_64-linux/elf:/export/build/gnu/glibc/build-x86_64-linux/dlfcn:/export/build/gnu/glibc/build-x86_64-linux/nss:/export/build/gnu/glibc/build-x86_64-linux/nis:/export/build/gnu/glibc/build-x86_64-linux/rt:/export/build/gnu/glibc/build-x86_64-linux/resolv:/export/build/gnu/glibc/build-x86_64-linux/crypt:/export/build/gnu/glibc/build-x86_64-linux/nptl /export/build/gnu/glibc/build-x86_64-linux/inet/test-inet6_opt > /export/build/gnu/glibc/build-x86_64-linux/inet/test-inet6_opt.out /bin/sh: line 1: 21941 Segmentation fault GCONV_PATH=/export/build/gnu/glibc/build-x86_64-linux/iconvdata LC_ALL=C /export/build/gnu/glibc/build-x86_64-linux/elf/ld-linux-x86-64.so.2 --library-path /export/build/gnu/glibc/build-x86_64-linux:/export/build/gnu/glibc/build-x86_64-linux/math:/export/build/gnu/glibc/build-x86_64-linux/elf:/export/build/gnu/glibc/build-x86_64-linux/dlfcn:/export/build/gnu/glibc/build-x86_64-linux/nss:/export/build/gnu/glibc/build-x86_64-linux/nis:/export/build/gnu/glibc/build-x86_64-linux/rt:/export/build/gnu/glibc/build-x86_64-linux/resolv:/export/build/gnu/glibc/build-x86_64-linux/crypt:/export/build/gnu/glibc/build-x86_64-linux/nptl /export/build/gnu/glibc/build-x86_64-linux/elf/tst-global1 > /export/build/gnu/glibc/build-x86_64-linux/elf/tst-global1.out
FWIW, the i686 kernel is OK.
This regression was introduced by execshield change: * Mon Jan 19 2009 Kyle McMartin <kyle> - execshield fixes: should no longer generate spurious handled GPFs, fixes randomization of executables. also some clean ups.
This may be caused by the fix for bug 473254.
Uh? Execshield is i386 only... I'm curious how this could be breaking on x86_64?
Created attachment 334715 [details] The diff between working and non-working kernels Here is the diff between working and non-working kernels. Is there anything which doesn't belong to x86-64 kernel?
My guess is the shlib randomization bits of execshield are horking up glibc... Those /would/ get applied on x86_64... I'm doing a build commenting those out now, and I'll post the URL when they're ready. cheers, Kyle
Build is here: http://koji.fedoraproject.org/koji/taskinfo?taskID=1235716 Hopefully it will succeed... It will at least narrow the failure down.
I applied this patch: --- linux-2.6.27.x86_64/mm/mmap.c.execshield 2009-03-10 14:47:03.000000000 -0 700 +++ linux-2.6.27.x86_64/mm/mmap.c 2009-03-10 14:45:13.000000000 -0700 @@ -1499,8 +1499,7 @@ arch_get_unmapped_exec_area(struct file if (!addr) addr = randomize_range(SHLIB_BASE, 0x01000000, len); - - if (addr) { + else { addr = PAGE_ALIGN(addr); vma = find_vma(mm, addr); if (TASK_SIZE - len >= addr && and kernel works fine on Linux/x86-64. Since arch_get_unmapped_exec_area only works for 32bit address space, I don't think arch_pick_mmap_layout in arch/x86/mm/mmap.c should do mm->get_unmapped_exec_area = arch_get_unmapped_exec_area; for 64bit processes. It should fix the problem and shorten 64bit programs load time.
Yeah, I agree, I'll take a closer look at the changes. The build I posted above has the assignment stubbed out on x86_64, so it should resolve the issue as well.
Created attachment 334733 [details] A patch I am testing this patch against kernel-2_6_27_19-170_2_44_fc10.
(In reply to comment #13) > Created an attachment (id=334733) [details] > A patch > > I am testing this patch against kernel-2_6_27_19-170_2_44_fc10. This patch works for me.
kernel-2.6.27.19-78.2.31.fc9.x86_64 has the same bug. My patch for Fedora 10 kernel works on Fedora 9 kernel.
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