ipxe package build is crashing in rawhide on an ld step. We use cross-binutils to ensure the package is buildable on every arch. Editing the package spec to use make -j1, the failure looks like: ... x86_64-linux-gnu-objdump -ht bin/ipxe.lkrn.tmp | perl ./util/sortobjdump.pl >> bin/ipxe.lkrn.tmp.map x86_64-linux-gnu-objcopy -O binary -R .zinfo bin/ipxe.lkrn.tmp bin/ipxe.lkrn.bin x86_64-linux-gnu-objcopy -O binary -j .zinfo bin/ipxe.lkrn.tmp bin/ipxe.lkrn.zinfo ./util/zbin bin/ipxe.lkrn.bin bin/ipxe.lkrn.zinfo > bin/ipxe.lkrn.zbin cp bin/ipxe.lkrn.zbin bin/ipxe.lkrn ISOLINUX_BIN=/usr/share/syslinux/isolinux.bin LDLINUX_C32=/usr/share/syslinux/ldlinux.c32 \ VERSION="1.0.0+" bash util/geniso -o bin/ipxe.iso bin/ipxe.lkrn x86_64-linux-gnu-ld -m elf_i386 -N --no-check-sections --section-start=.prefix=0 --gc-sections -static -o bin/usbdisk.bin --oformat binary -e 0 bin/usbdisk.o make: *** [arch/x86/Makefile.pcbios:116: bin/usbdisk.bin] Segmentation fault (core dumped) This doesn't crash on latest f26. I confirmed the issue is present with the latest cross-gcc/cross-binutils packages from koji: # rpm -qa | grep linux-gnu binutils-x86_64-linux-gnu-2.29-3.fc27.x86_64 gcc-x86_64-linux-gnu-7.1.1-4.fc27.x86_64
Created attachment 1310112 [details] Test data This data can be decompressed and then passed through the linker like so: x86_64-linux-gnu-ld -m elf_i386 -N --no-check-sections --section-start=.prefix=0 --gc-sections -static -o bin/usbdisk.bin --oformat binary -e 0 usbdisk.o
Program received signal SIGSEGV, Segmentation fault. 0x000000000042e3a4 in gldelf_i386_place_orphan (s=0x82cea0, secname=0x82c692 ".prefix", constraint=382) at eelf_i386.c:1978 1978 && (elf_section_data (os->bfd_section)->this_hdr.sh_info (gdb) bt #0 0x000000000042e3a4 in gldelf_i386_place_orphan (s=0x82cea0, secname=0x82c692 ".prefix", constraint=382) at eelf_i386.c:1978 #1 0x0000000000412bfa in lang_place_orphans () at ../../binutils-2.29/ld/ldlang.c:6396 #2 0x0000000000416f21 in lang_process () at ../../binutils-2.29/ld/ldlang.c:7198 #3 0x0000000000403ee0 in main (argc=<optimized out>, argv=<optimized out>) at ../../binutils-2.29/ld/ldmain.c:413 The fault apparently occurs on line 1978 in the following: 1977 if (os->bfd_section != NULL 1978 && (elf_section_data (os->bfd_section)->this_hdr.sh_info 1979 == elf_section_data (s)->this_hdr.sh_info) 1980 && (os->bfd_section->flags == 0 1981 || ((!bfd_link_relocatable (&link_info) 1982 || (iself && (((elf_section_flags (s) 1983 ^ elf_section_flags (os->bfd_section)) 1984 & SHF_EXCLUDE) == 0))) (gdb) p os $1 = (lang_output_section_statement_type *) 0x81e168 (gdb) p os->bfd_section $2 = (asection *) 0x820720 (gdb) p s $3 = (asection *) 0x82cea0 Looking at the disassembly, line 1977 starts here: 0x000000000042e386 <+822>: mov 0x38(%rbx),%rsi 0x000000000042e38a <+826>: test %rsi,%rsi 0x000000000042e38d <+829>: je 0x42e448 <gldelf_i386_place_orphan+1016> 0x000000000042e393 <+835>: mov 0xe0(%rsi),%rax 0x000000000042e39a <+842>: mov 0xe0(%rbp),%rdx 0x000000000042e3a1 <+849>: mov 0x2c(%rdx),%ecx => 0x000000000042e3a4 <+852>: cmp %ecx,0x2c(%rax) So %rbx holds 'os', %rsi holds 'os->bfd_section' and %rbp holds 's'. (gdb) p/x *(long*)($rsi+0xe0) $13 = 0x0 (gdb) p/x *(long*)($rbp+0xe0) $14 = 0x82f170 So elf_section_data (os->bfd_section) returns NULL and a SEGV occurs when we try and dereference it.
This bug appears to have been reported against 'rawhide' during the Fedora 27 development cycle. Changing version to '27'.
I think the following commits fix the problem. https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=a388b7afeffad6411686d39dc1c62294da48a814 https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=36088682f447540fd8666a2c437fa232064044a7
Any timeline on getting this fixed with fedora packages? I still can't build ipxe on f27/rawhide. Not urgent I just don't want it to be forgotten
cross-binutils-2.29.1-1.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2017-4ac0ead391
cross-binutils-2.29.1-1.fc27 has been submitted as an update to Fedora 27. https://bodhi.fedoraproject.org/updates/FEDORA-2017-06c4b02fd7
cross-binutils-2.29.1-1.fc27 has been pushed to the Fedora 27 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-06c4b02fd7
cross-binutils-2.29.1-1.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-4ac0ead391
cross-binutils-2.29.1-1.fc27 has been pushed to the Fedora 27 stable repository. If problems still persist, please make note of it in this bug report.
cross-binutils-2.29.1-1.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.