Control: found -1 2.37.90.20220123-2 Control: affects -1 src:xen Hi,
this bug is still present in my sbuild chroot (updated about an hour ago) when compiling xen 4.14.3+32-g9de3671772-1 from unstable. I managed to run x86_64-linux-gnu-ld inside gdb to catch the segmentation fault. Please see the output below. I hope this is helpful to somebody tracking down the problem. Please note for the xen case: in https://sources.debian.org/src/xen/4.14.3+32-g9de3671772-1/xen/arch/x86/Makefile/?hl=185#L185 the linker is checked for PE support. If it segfaults during this check the build system will disable building some parts below in this Makefile. So in this case it might never try to call the command from my gdb output below. In my sbuild this check command randomly completes with return code 0 or with a segmentation fault using the following command: $ x86_64-linux-gnu-ld -mi386pep --subsystem=10 --image-base=0x100000000 --stack=0,0 --heap=0,0 --strip-debug --section-alignment=0x200000 --file-alignment=0x20 --major-image-version=4 --minor-image-version=14 --major-os-version=2 --minor-os-version=0 --major-subsystem-version=2 --minor-subsystem-version=0 -o efi/check.efi efi/check.o $ gdb -batch -n -ex 'set pagination off' -ex 'run -mi386pep --subsystem=10 --image-base=0xffff82d040000000 --stack=0,0 --heap=0,0 --strip-debug --section-alignment=0x200000 --file-alignment=0x20 --major-image-version=4 --minor-image-version=14 --major-os-version=2 --minor-os-version=0 --major-subsystem-version=2 --minor-subsystem-version=0 --no-insert-timestamp --build-id=sha1 -T efi.lds -N prelink-efi.o efi/relocs-dummy.o /build/xen-Hf5EN0/xen-4.14.3+32-g9de3671772/xen/common/symbols-dummy.o -b pe-x86-64 efi/buildid.o -o /build/xen-Hf5EN0/xen-4.14.3+32-g9de3671772/xen/.xen.efi.0xffff82d040000000.0 && x86_64-linux-gnu-ld -mi386pep --subsystem=10 --image-base=0xffff82d080000000 --stack=0,0 --heap=0,0 --strip-debug --section-alignment=0x200000 --file-alignment=0x20 --major-image-version=4 --minor-image-version=14 --major-os-version=2 --minor-os-version=0 --major-subsystem-version=2 --minor-subsystem-version=0 --no-insert-timestamp --build-id=sha1 -T efi.lds -N prelink-efi.o efi/relocs-dummy.o /build/xen-Hf5EN0/xen-4.14.3+32-g9de3671772/xen/common/symbols-dummy.o -b pe-x86-64 efi/buildid.o -o /build/xen-Hf5EN0/xen-4.14.3+32-g9de3671772/xen/.xen.efi.0xffff82d080000000.0' -ex bt -ex 'bt full' --args x86_64-linux-gnu-ld Program received signal SIGSEGV, Segmentation fault. __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:120 120 ../sysdeps/x86_64/multiarch/../strlen.S: No such file or directory. #0 __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:120 #1 0x00007ffff7f6bbac in coff_write_auxent_fname.isra.0 (str=0x23527e <error: Cannot access memory at address 0x23527e>, auxent=auxent@entry=0x7fffffffe208, string_size_p=string_size_p@entry=0x7fffffffe2d8, abfd=<optimized out>, abfd=<optimized out>) at ../../bfd/coffgen.c:856 #2 0x00007ffff7f3806d in coff_write_symbol (abfd=0x555555701b20, symbol=0x7ffff7973780, native=native@entry=0x7fffffffe1c0, written=0x7fffffffe2d0, string_size_p=0x7fffffffe2d8, debug_string_section_p=debug_string_section_p@entry=0x0, debug_string_size_p=0x0) at ../../bfd/coffgen.c:1043 #3 0x00007ffff7f3834e in coff_write_alien_symbol (abfd=<optimized out>, symbol=<optimized out>, isym=0x7fffffffe310, iaux=0x7fffffffe2e0, written=<optimized out>, string_size_p=<optimized out>, debug_string_section_p=0x0, debug_string_size_p=0x0) at ../../bfd/coffgen.c:1154 #4 0x00007ffff7f2e74a in _bfd_coff_final_link (abfd=<optimized out>, info=0x5555556fa3c0 <link_info>) at ../../bfd/cofflink.c:928 #5 0x000055555559b53f in ldwrite () at ../../ld/ldwrite.c:545 #6 main (argc=<optimized out>, argv=<optimized out>) at ../../ld/ldmain.c:513 #0 __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:120 No locals. #1 0x00007ffff7f6bbac in coff_write_auxent_fname.isra.0 (str=0x23527e <error: Cannot access memory at address 0x23527e>, auxent=auxent@entry=0x7fffffffe208, string_size_p=string_size_p@entry=0x7fffffffe2d8, abfd=<optimized out>, abfd=<optimized out>) at ../../bfd/coffgen.c:856 str_length = <optimized out> filnmlen = <optimized out> #2 0x00007ffff7f3806d in coff_write_symbol (abfd=0x555555701b20, symbol=0x7ffff7973780, native=native@entry=0x7fffffffe1c0, written=0x7fffffffe2d0, string_size_p=0x7fffffffe2d8, debug_string_section_p=debug_string_section_p@entry=0x0, debug_string_size_p=0x0) at ../../bfd/coffgen.c:1043 auxesz = 18 j = <optimized out> numaux = 1 type = <optimized out> n_sclass = <optimized out> output_section = <optimized out> buf = 0x5555558abf00 symesz = <optimized out> #3 0x00007ffff7f3834e in coff_write_alien_symbol (abfd=<optimized out>, symbol=<optimized out>, isym=0x7fffffffe310, iaux=0x7fffffffe2e0, written=<optimized out>, string_size_p=<optimized out>, debug_string_section_p=0x0, debug_string_size_p=0x0) at ../../bfd/coffgen.c:1154 native = 0x7fffffffe1c0 dummy = {{offset = 1, fix_value = 0, fix_tag = 0, fix_end = 0, fix_scnlen = 0, fix_line = 0, u = {auxent = {x_sym = {x_tagndx = {l = 435610543662, p = 0x656c69662e}, x_misc = {x_lnsz = {x_lnno = 46240, x_size = 63456}, x_fsize = 140737352086688}, x_fcnary = {x_fcn = {x_lnnoptr = 140737350733261, x_endndx = {l = 4294967294, p = 0xfffffffe}}, x_ary = {x_dimen = {3533, 63436, 32767, 0}}}, x_tvndx = 359}, x_file = {x_n = {x_fname = ".file\000\000\000\240\264\340\367\377\177\000\000\315\r\314", <incomplete sequence \367>, x_n = {x_zeroes = 435610543662, x_offset = 140737352086688}}, x_ftype = 254 '\376'}, x_scn = {x_scnlen = 435610543662, x_nreloc = 46240, x_nlinno = 63456, x_checksum = 140737350733261, x_associated = 65534, x_comdat = 255 '\377'}, x_tv = {x_tvfill = 435610543662, x_tvlen = 46240, x_tvran = {63456, 32767}}, x_csect = {x_scnlen = {l = 435610543662, p = 0x656c69662e}, x_parmhash = 140737352086688, x_snhash = 3533, x_smtyp = 204 '\314', x_smclas = 247 '\367', x_stab = 4294967294, x_snstab = 359}, x_sect = {x_scnlen = 435610543662, x_nreloc = 140737352086688}}, syment = {_n = {_n_name = ".file\000\000", _n_n = {_n_zeroes = 435610543662, _n_offset = 140737352086688}, _n_nptr = {0x656c69662e <error: Cannot access memory at address 0x656c69662e>, 0x7ffff7e0b4a0 <_IO_file_jumps> ""}}, n_value = 140737350733261, n_scnum = -2, n_flags = 0, n_type = 0, n_sclass = 103 'g', n_numaux = 1 '\001'}}, is_sym = true, extrap = 0x0}, {offset = 1433813712, fix_value = 1, fix_tag = 0, fix_end = 1, fix_scnlen = 0, fix_line = 1, u = {auxent = {x_sym = {x_tagndx = {l = 7074994964478652259, p = 0x622f6e6f6d6d6f63}, x_misc = {x_lnsz = {x_lnno = 29801, x_size = 24941}, x_fsize = 27917082900132969}, x_fcnary = {x_fcn = {x_lnnoptr = 140737352630272, x_endndx = {l = 140737353778592, p = 0x7ffff7fa85a0 <cache_iovec>}}, x_ary = {x_dimen = {0, 63465, 32767, 0}}}, x_tvndx = 6944}, x_file = {x_n = {x_fname = "common/bitmap.c\000\000\000\351", <incomplete sequence \367>, x_n = {x_zeroes = 7074994964478652259, x_offset = 27917082900132969}}, x_ftype = 160 '\240'}, x_scn = {x_scnlen = 7074994964478652259, x_nreloc = 29801, x_nlinno = 24941, x_checksum = 140737352630272, x_associated = 34208, x_comdat = 250 '\372'}, x_tv = {x_tvfill = 7074994964478652259, x_tvlen = 29801, x_tvran = {24941, 11888}}, x_csect = {x_scnlen = {l = 7074994964478652259, p = 0x622f6e6f6d6d6f63}, x_parmhash = 27917082900132969, x_snhash = 0, x_smtyp = 233 '\351', x_smclas = 247 '\367', x_stab = 140737353778592, x_snstab = 6944}, x_sect = {x_scnlen = 7074994964478652259, x_nreloc = 27917082900132969}}, syment = {_n = {_n_name = "common/b", _n_n = {_n_zeroes = 7074994964478652259, _n_offset = 27917082900132969}, _n_nptr = {0x622f6e6f6d6d6f63 <error: Cannot access memory at address 0x622f6e6f6d6d6f63>, 0x632e70616d7469 <error: Cannot access memory at address 0x632e70616d7469>}}, n_value = 140737352630272, n_scnum = -134576736, n_flags = 32767, n_type = 0, n_sclass = 32 ' ', n_numaux = 27 '\033'}}, is_sym = false, extrap = 0x23527e}} output_section = <optimized out> link_info = <optimized out> ret = <optimized out> #4 0x00007ffff7f2e74a in _bfd_coff_final_link (abfd=<optimized out>, info=0x5555556fa3c0 <link_info>) at ../../bfd/cofflink.c:928 sym = 0x7ffff7973780 isym = {_n = {_n_name = "\000\000\000\000\000\000\000", _n_n = {_n_zeroes = 0, _n_offset = 926}, _n_nptr = {0x0, 0x39e <error: Cannot access memory at address 0x39e>}}, n_value = 32768, n_scnum = 6, n_flags = 0, n_type = 0, n_sclass = 3 '\003', n_numaux = 0 '\000'} string_size = 0 written = 0 hash = <optimized out> pos = 2314878 iaux = {x_sym = {x_tagndx = {l = 122245043283304, p = 0x6f2e64616568}, x_misc = {x_lnsz = {x_lnno = 0, x_size = 0}, x_fsize = 0}, x_fcnary = {x_fcn = {x_lnnoptr = 0, x_endndx = {l = 0, p = 0x0}}, x_ary = {x_dimen = {0, 0, 0, 0}}}, x_tvndx = 0}, x_file = {x_n = {x_fname = "head.o", '\000' <repeats 13 times>, x_n = {x_zeroes = 122245043283304, x_offset = 0}}, x_ftype = 0 '\000'}, x_scn = {x_scnlen = 122245043283304, x_nreloc = 0, x_nlinno = 0, x_checksum = 0, x_associated = 0, x_comdat = 0 '\000'}, x_tv = {x_tvfill = 122245043283304, x_tvlen = 0, x_tvran = {0, 0}}, x_csect = {x_scnlen = {l = 122245043283304, p = 0x6f2e64616568}, x_parmhash = 0, x_snhash = 0, x_smtyp = 0 '\000', x_smclas = 0 '\000', x_stab = 0, x_snstab = 0}, x_sect = {x_scnlen = 122245043283304, x_nreloc = 0}} indx = <optimized out> rewrite = false i = 233 symesz = <optimized out> flaginfo = {info = 0x5555556fa3c0 <link_info>, output_bfd = 0x555555701b20, failed = 32, global_to_static = false, strtab = 0x555555801490, section_info = 0x0, last_file_index = 0, last_file = {_n = {_n_name = ".file\000\000", _n_n = {_n_zeroes = 435610543662, _n_offset = 0}, _n_nptr = {0x656c69662e <error: Cannot access memory at address 0x656c69662e>, 0x0}}, n_value = 0, n_scnum = -2, n_flags = 0, n_type = 0, n_sclass = 103 'g', n_numaux = 1 '\001'}, last_bf_index = -1, last_bf = {x_sym = {x_tagndx = {l = 93824992519136, p = 0x55555559a3e0 <build_link_order>}, x_misc = {x_lnsz = {x_lnno = 41135, x_size = 63466}, x_fsize = 140737352736943}, x_fcnary = {x_fcn = {x_lnnoptr = 93824993998944, x_endndx = {l = 140737352736974, p = 0x7ffff7eaa0ce <bfd_new_link_order+14>}}, x_ary = {x_dimen = {14432, 21872, 21845, 0}}}, x_tvndx = 33048}, x_file = {x_n = {x_fname = "\340\243YUUU\000\000\257\240\352\367\377\177\000\000`8pU", x_n = {x_zeroes = 93824992519136, x_offset = 140737352736943}}, x_ftype = 206 '\316'}, x_scn = {x_scnlen = 93824992519136, x_nreloc = 41135, x_nlinno = 63466, x_checksum = 93824993998944, x_associated = 41166, x_comdat = 234 '\352'}, x_tv = {x_tvfill = 93824992519136, x_tvlen = 41135, x_tvran = {63466, 32767}}, x_csect = {x_scnlen = {l = 93824992519136, p = 0x55555559a3e0 <build_link_order>}, x_parmhash = 140737352736943, x_snhash = 14432, x_smtyp = 112 'p', x_smclas = 85 'U', x_stab = 140737352736974, x_snstab = 33048}, x_sect = {x_scnlen = 93824992519136, x_nreloc = 140737352736943}}, debug_merge = {root = {table = 0x5555558bcae0, newfunc = 0x7ffff7f2cb00 <_bfd_coff_debug_merge_hash_newfunc>, memory = 0x5555557fe4e0, size = 4051, count = 0, entsize = 32, frozen = 0}}, internal_syms = 0x555555701a10, sec_ptrs = 0x5555557fe7e0, sym_indices = 0x555555801890, outsyms = 0x5555557642d0 "", linenos = 0x5555558ac640 "\020\237\340\367\377\177", contents = 0x7ffff7715010 "", external_relocs = 0x5555558c5990 "p\223\022", internal_relocs = 0x7ffff7620010} debug_merge_allocated = true long_section_names = <optimized out> o = <optimized out> p = <optimized out> max_sym_count = <optimized out> max_lineno_count = <optimized out> max_reloc_count = <optimized out> max_output_reloc_count = <optimized out> max_contents_size = <optimized out> rel_filepos = <optimized out> relsz = <optimized out> line_filepos = <optimized out> linesz = <optimized out> sub = 0x555555703f30 external_relocs = 0x0 strbuf = "\000\000\000" amt = <optimized out> error_return = <optimized out> #5 0x000055555559b53f in ldwrite () at ../../ld/ldwrite.c:545 No locals. #6 main (argc=<optimized out>, argv=<optimized out>) at ../../ld/ldmain.c:513 emulation = <optimized out> start_time = 1382 Thanks
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