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Re: ld.elf_so core dump: NULL ehdr in _rtld_init
On Sat, Jul 27, 2024 at 08:45:37AM +0200, Martin Husemann wrote:
> On Sat, Jul 27, 2024 at 07:19:58AM +0200, Thomas Klausner wrote:
> > Hi!
> >
> > I've filed a bug report because backtrace-rs (the backtrace support in
> > rust) has a self test that dumps core.
>
> Can you objdump the headers of the binary (not sure if objdump -ph is enough,
> but it should be a start)?
Sure:
target/debug/deps/current_exe_mismatch-e7ad37dd6f4cbaa7: file format elf64-x86-64
Program Header:
PHDR off 0x0000000000000040 vaddr 0x0000000000000040 paddr 0x0000000000000040 align 2**3
filesz 0x00000000000002a0 memsz 0x00000000000002a0 flags r--
INTERP off 0x00000000000002e0 vaddr 0x00000000000002e0 paddr 0x00000000000002e0 align 2**0
filesz 0x0000000000000017 memsz 0x0000000000000017 flags r--
LOAD off 0x0000000000000000 vaddr 0x0000000000000000 paddr 0x0000000000000000 align 2**12
filesz 0x000000000001a268 memsz 0x000000000001a268 flags r--
LOAD off 0x000000000001b000 vaddr 0x000000000001b000 paddr 0x000000000001b000 align 2**12
filesz 0x000000000012edce memsz 0x000000000012edce flags r-x
LOAD off 0x000000000014a000 vaddr 0x000000000014a000 paddr 0x000000000014a000 align 2**12
filesz 0x000000000003e5f4 memsz 0x000000000003e5f4 flags r--
LOAD off 0x0000000000188e10 vaddr 0x0000000000189e10 paddr 0x0000000000189e10 align 2**12
filesz 0x00000000000102c9 memsz 0x0000000000010438 flags rw-
DYNAMIC off 0x0000000000195240 vaddr 0x0000000000196240 paddr 0x0000000000196240 align 2**3
filesz 0x00000000000001e0 memsz 0x00000000000001e0 flags rw-
NOTE off 0x00000000000002f8 vaddr 0x00000000000002f8 paddr 0x00000000000002f8 align 2**2
filesz 0x000000000000002c memsz 0x000000000000002c flags r--
TLS off 0x0000000000188e10 vaddr 0x0000000000189e10 paddr 0x0000000000189e10 align 2**3
filesz 0x0000000000000000 memsz 0x0000000000000050 flags r--
EH_FRAME off 0x000000000015906c vaddr 0x000000000015906c paddr 0x000000000015906c align 2**2
filesz 0x0000000000008e9c memsz 0x0000000000008e9c flags r--
STACK off 0x0000000000000000 vaddr 0x0000000000000000 paddr 0x0000000000000000 align 2**4
filesz 0x0000000000000000 memsz 0x0000000000000000 flags rw-
RELRO off 0x0000000000188e10 vaddr 0x0000000000189e10 paddr 0x0000000000189e10 align 2**0
filesz 0x00000000000101f0 memsz 0x00000000000101f0 flags r--
Dynamic Section:
NEEDED libc.so.12
NEEDED libpthread.so.1
NEEDED libgcc_s.so.1
RPATH /usr/pkg/lib/libatomic
INIT 0x000000000001b000
FINI 0x0000000000149dc0
HASH 0x0000000000000328
STRTAB 0x0000000000000ed8
SYMTAB 0x00000000000005c0
STRSZ 0x0000000000000524
SYMENT 0x0000000000000018
DEBUG 0x0000000000000000
PLTGOT 0x0000000000196420
PLTRELSZ 0x0000000000000078
PLTREL 0x0000000000000007
JMPREL 0x000000000001a1f0
RELA 0x0000000000001500
RELASZ 0x0000000000018cf0
RELAENT 0x0000000000000018
BIND_NOW 0x0000000000000000
FLAGS_1 0x0000000008000001
VERNEED 0x00000000000014c0
VERNEEDNUM 0x0000000000000001
VERSYM 0x00000000000013fc
RELACOUNT 0x0000000000001035
Version References:
required from libgcc_s.so.1:
0x09276060 0x00 04 GCC_4.2.0
0x0b792650 0x00 03 GCC_3.0
0x0b792653 0x00 02 GCC_3.3
Sections:
Idx Name Size VMA LMA File off Algn
0 .interp 00000017 00000000000002e0 00000000000002e0 000002e0 2**0
CONTENTS, ALLOC, LOAD, READONLY, DATA
1 .note.netbsd.ident 00000018 00000000000002f8 00000000000002f8 000002f8 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
2 .note.netbsd.pax 00000014 0000000000000310 0000000000000310 00000310 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
3 .hash 00000298 0000000000000328 0000000000000328 00000328 2**3
CONTENTS, ALLOC, LOAD, READONLY, DATA
4 .dynsym 00000918 00000000000005c0 00000000000005c0 000005c0 2**3
CONTENTS, ALLOC, LOAD, READONLY, DATA
5 .dynstr 00000524 0000000000000ed8 0000000000000ed8 00000ed8 2**0
CONTENTS, ALLOC, LOAD, READONLY, DATA
6 .gnu.version 000000c2 00000000000013fc 00000000000013fc 000013fc 2**1
CONTENTS, ALLOC, LOAD, READONLY, DATA
7 .gnu.version_r 00000040 00000000000014c0 00000000000014c0 000014c0 2**3
CONTENTS, ALLOC, LOAD, READONLY, DATA
8 .rela.dyn 00018cf0 0000000000001500 0000000000001500 00001500 2**3
CONTENTS, ALLOC, LOAD, READONLY, DATA
9 .rela.plt 00000078 000000000001a1f0 000000000001a1f0 0001a1f0 2**3
CONTENTS, ALLOC, LOAD, READONLY, DATA
10 .init 0000000e 000000000001b000 000000000001b000 0001b000 2**4
CONTENTS, ALLOC, LOAD, READONLY, CODE
11 .plt 00000060 000000000001b010 000000000001b010 0001b010 2**4
CONTENTS, ALLOC, LOAD, READONLY, CODE
12 .plt.got 00000038 000000000001b070 000000000001b070 0001b070 2**3
CONTENTS, ALLOC, LOAD, READONLY, CODE
13 .text 0012ed0b 000000000001b0b0 000000000001b0b0 0001b0b0 2**4
CONTENTS, ALLOC, LOAD, READONLY, CODE
14 .fini 0000000e 0000000000149dc0 0000000000149dc0 00149dc0 2**4
CONTENTS, ALLOC, LOAD, READONLY, CODE
15 .rodata 0000f049 000000000014a000 000000000014a000 0014a000 2**4
CONTENTS, ALLOC, LOAD, READONLY, DATA
16 .debug_gdb_scripts 00000022 0000000000159049 0000000000159049 00159049 2**0
CONTENTS, ALLOC, LOAD, READONLY, DATA
17 .eh_frame_hdr 00008e9c 000000000015906c 000000000015906c 0015906c 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
18 .eh_frame 0001ff4c 0000000000161f08 0000000000161f08 00161f08 2**3
CONTENTS, ALLOC, LOAD, READONLY, DATA
19 .gcc_except_table 000067a0 0000000000181e54 0000000000181e54 00181e54 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
20 .tbss 00000050 0000000000189e10 0000000000189e10 00188e10 2**3
ALLOC, THREAD_LOCAL
21 .ctors 00000010 0000000000189e10 0000000000189e10 00188e10 2**3
CONTENTS, ALLOC, LOAD, DATA
22 .dtors 00000010 0000000000189e20 0000000000189e20 00188e20 2**3
CONTENTS, ALLOC, LOAD, DATA
23 .jcr 00000008 0000000000189e30 0000000000189e30 00188e30 2**3
CONTENTS, ALLOC, LOAD, DATA
24 .data.rel.ro 0000c408 0000000000189e38 0000000000189e38 00188e38 2**3
CONTENTS, ALLOC, LOAD, DATA
25 .dynamic 000001e0 0000000000196240 0000000000196240 00195240 2**3
CONTENTS, ALLOC, LOAD, DATA
26 .got 00003be0 0000000000196420 0000000000196420 00195420 2**3
CONTENTS, ALLOC, LOAD, DATA
27 .data 000000d9 000000000019a000 000000000019a000 00199000 2**3
CONTENTS, ALLOC, LOAD, DATA
28 .bss 00000148 000000000019a100 000000000019a100 001990d9 2**6
ALLOC
29 .comment 0000006c 0000000000000000 0000000000000000 001990d9 2**0
CONTENTS, READONLY
30 .ident 00000155 0000000000000000 0000000000000000 00199145 2**0
CONTENTS, READONLY
31 .SUNW_ctf 00000047 0000000000000000 0000000000000000 0019929c 2**2
CONTENTS, READONLY
32 .debug_aranges 00015f30 0000000000000000 0000000000000000 001992e3 2**0
CONTENTS, READONLY, DEBUGGING, OCTETS
33 .debug_info 00297985 0000000000000000 0000000000000000 001af213 2**0
CONTENTS, READONLY, DEBUGGING, OCTETS
34 .debug_abbrev 0001a5f4 0000000000000000 0000000000000000 00446b98 2**0
CONTENTS, READONLY, DEBUGGING, OCTETS
35 .debug_line 000921ac 0000000000000000 0000000000000000 0046118c 2**0
CONTENTS, READONLY, DEBUGGING, OCTETS
36 .debug_str 001b7976 0000000000000000 0000000000000000 004f3338 2**0
CONTENTS, READONLY, DEBUGGING, OCTETS
37 .debug_loc 0000b47f 0000000000000000 0000000000000000 006aacae 2**0
CONTENTS, READONLY, DEBUGGING, OCTETS
38 .debug_ranges 00068180 0000000000000000 0000000000000000 006b612d 2**0
CONTENTS, READONLY, DEBUGGING, OCTETS
> Or provide the binary?
http://www.netbsd.org/~wiz/current_exe_mismatch.tar.gz
If you have rust installed, you can probably reproduce this by running
git clone git%github.com@localhost:rust-lang/backtrace-rs.git
cd backtrace-rs
cargo test
Cheers,
Thomas
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