libcrypto.so.111 linked binaries SIGSEGV (in bhyve guest)

[Harry Schmalzbauer]

Am 21.02.2019 um 10:36 schrieb Konstantin Belousov:
…
>>
>> ELF Header:
>>     Magic:   7f 45 4c 46 02 01 01 09 00 00 00 00 00 00 00 00
>>     Class:                             ELF64
>>     Data:                              2's complement, little endian
>>     Version:                           1 (current)
>>     OS/ABI:                            FreeBSD
>>     ABI Version:                       0
>>     Type:                              DYN (Shared object file)
>>     Machine:                           Advanced Micro Devices x86-64
>>     Version:                           0x1
>>     Entry point address:               0x116000
>>     Start of program headers:          64 (bytes into file)
>>     Start of section headers:          3090864 (bytes into file)
>>     Flags:                             0
>>     Size of this header:               64 (bytes)
>>     Size of program headers:           56 (bytes)
>>     Number of program headers:         8
>>     Size of section headers:           64 (bytes)
>>     Number of section headers:         29
>>     Section header string table index: 28
>>
>> Elf file type is DYN (Shared object file)
>> Entry point 0x116000
>> There are 8 program headers, starting at offset 64
>>
>> Program Headers:
>>     Type           Offset             VirtAddr           PhysAddr
>>                    FileSiz            MemSiz              Flg    Align
>>     PHDR           0x0000000000000040 0x0000000000000040 0x0000000000000040
>>                    0x00000000000001c0 0x00000000000001c0  R      0x8
>>     LOAD           0x0000000000000000 0x0000000000000000 0x0000000000000000
>>                    0x0000000000115a7c 0x0000000000115a7c  R      0x1000
>>     LOAD           0x0000000000116000 0x0000000000116000 0x0000000000116000
>>                    0x00000000001acb20 0x00000000001acb20  R E    0x1000
>>     LOAD           0x00000000002c3000 0x00000000002c3000 0x00000000002c3000
>>                    0x000000000002f790 0x00000000000325e0  RW     0x1000
>>     DYNAMIC        0x00000000002f1a80 0x00000000002f1a80 0x00000000002f1a80
>>                    0x0000000000000190 0x0000000000000190  RW     0x8
>>     GNU_RELRO      0x00000000002c9000 0x00000000002c9000 0x00000000002c9000
>>                    0x0000000000029790 0x0000000000029790  R      0x1
>>     GNU_EH_FRAME   0x00000000000d0050 0x00000000000d0050 0x00000000000d0050
>>                    0x000000000000bc74 0x000000000000bc74  R      0x4
>>     GNU_STACK      0x0000000000000000 0x0000000000000000 0x0000000000000000
>>                    0x0000000000000000 0x0000000000000000  RW     0
>>
>>    Section to Segment mapping:
>>     Segment Sections...
>>      00
>>      01     (null) (null) (null) (null) (null) (null) (null) (null)
>> (null) (null) (null) (null) (null) (null) (null) (null) (null) (null)
>> (null) (null) (null) (null) (null) (null) (null) (null) (null) (null)
>>      02
>>      03
>>      04
>>      05
>>      06
>>      07     (null) (null) (null) (null) (null) (null) (null) (null)
>> (null) (null) (null) (null) (null) (null) (null) (null) (null) (null)
>> (null) (null) (null) (null) (null) (null) (null) (null) (null) (null)
>> There are 29 section headers, starting at offset 0x2f29b0:
>>

…

> The object is clearly corrupted.

Thanks to your hint to readelf, I found out that it gets corrupted 
during dump(8) (or resotore, not yet analyzed).
The obj tree contains the good version, the dump archive not.
The dump archive is used as source for the ISO, hence the described errors.
Now I have to dig in 10 years old deployment scripts to track down and 
reproduce the corruption.  No explanation so far, but for sure no 
rtld-elf problem :-)
And also not a problem in the FreeBSD make chain, building stable/12 on 
stable/11 works as intended and doesn't produce the mutilated 
libcrypto.so.111!

Thanks,

-harry