==9591== Memcheck, a memory error detector
==9591== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==9591== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==9591== Command: ./gssproxy -i -s /usr/src/RPM/BUILD/gssproxy-0.8.0/testdir/gssproxy/gp.sock -c /usr/src/RPM/BUILD/gssproxy-0.8.0/testdir/gssproxy/gp.conf
==9591== 
[2018/03/19 07:35:51]: Debug Enabled (level: 3)
==9591== 
==9591== Process terminating with default action of signal 11 (SIGSEGV)
==9591==  General Protection Fault
==9591==    at 0x805910B: gp_strerror (gp_util.c:100)
==9591==    by 0x804E071: write_pid (gp_init.c:197)
==9591==    by 0x804BE04: main (gssproxy.c:238)
==9591== 
==9591== HEAP SUMMARY:
==9591==     in use at exit: 3,948 bytes in 120 blocks
==9591==   total heap usage: 1,156 allocs, 1,036 frees, 108,201 bytes allocated
==9591== 
==9591== LEAK SUMMARY:
==9591==    definitely lost: 0 bytes in 0 blocks
==9591==    indirectly lost: 0 bytes in 0 blocks
==9591==      possibly lost: 0 bytes in 0 blocks
==9591==    still reachable: 3,948 bytes in 120 blocks
==9591==         suppressed: 0 bytes in 0 blocks
==9591== Rerun with --leak-check=full to see details of leaked memory
==9591== 
==9591== For counts of detected and suppressed errors, rerun with: -v
==9591== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

(gdb) bt
#0  gp_strerror (errnum=<optimized out>) at src/gp_util.c:100
#1  0x0804e072 in write_pid () at src/gp_init.c:197
#2  0x0804be05 in main (argc=<optimized out>, argv=<optimized out>) at src/gssproxy.c:238
   │97          } else if (ret != buf) {                                                      │
   │98              memset(buf, 0, MAX_GP_STRERROR);                                          │
   │99              strncpy(buf, ret, MAX_GP_STRERROR);                                       │
  >│100             buf[MAX_GP_STRERROR -1] = '\0';
(gdb) disassemble
Dump of assembler code for function gp_strerror:
   0x08059090 <+0>:     push   %ebp
   0x08059091 <+1>:     push   %edi
   0x08059092 <+2>:     push   %esi
   0x08059093 <+3>:     push   %ebx
   0x08059094 <+4>:     mov    %gs:0x0,%ebp
   0x0805909b <+11>:    sub    $0x1c,%esp
   0x0805909e <+14>:    call   0x804ac70 <__errno_location@plt>
   0x080590a3 <+19>:    mov    %eax,%esi
   0x080590a5 <+21>:    mov    (%eax),%eax
   0x080590a7 <+23>:    lea    -0x400(%ebp),%ebx
   0x080590ad <+29>:    sub    $0x4,%esp
   0x080590b0 <+32>:    mov    %eax,0x10(%esp)
   0x080590b4 <+36>:    push   $0x400
   0x080590b9 <+41>:    push   %ebx
   0x080590ba <+42>:    pushl  0x3c(%esp)
   0x080590be <+46>:    call   0x804b0c0 <strerror_r@plt>
   0x080590c3 <+51>:    add    $0x10,%esp
   0x080590c6 <+54>:    test   %eax,%eax
   0x080590c8 <+56>:    mov    %eax,%edx
   0x080590ca <+58>:    je     0x8059130 <gp_strerror+160>
   0x080590cc <+60>:    cmp    %ebx,%eax
   0x080590ce <+62>:    je     0x8059116 <gp_strerror+134>
   0x080590d0 <+64>:    lea    0x4(%ebx),%edi
   0x080590d3 <+67>:    mov    %ebx,%ecx
   0x080590d5 <+69>:    xor    %eax,%eax
   0x080590d7 <+71>:    movl   $0x0,%gs:0xfffffc00
   0x080590e2 <+82>:    movl   $0x0,0x3fc(%ebx)
   0x080590ec <+92>:    sub    $0x4,%esp
   0x080590ef <+95>:    and    $0xfffffffc,%edi
   0x080590f2 <+98>:    sub    %edi,%ecx
   0x080590f4 <+100>:   add    $0x400,%ecx
   0x080590fa <+106>:   shr    $0x2,%ecx
   0x080590fd <+109>:   rep stos %eax,%es:(%edi)
   0x080590ff <+111>:   push   $0x400
   0x08059104 <+116>:   push   %edx
   0x08059105 <+117>:   push   %ebx
   0x08059106 <+118>:   call   0x804aee0 <strncpy@plt>
   0x0805910b <+123>:   movb   $0x0,%gs:0xffffffff
   0x08059113 <+131>:   add    $0x10,%esp
   0x08059116 <+134>:   mov    0xc(%esp),%eax
   0x0805911a <+138>:   mov    %eax,(%esi)
   0x0805911c <+140>:   add    $0x1c,%esp
   0x0805911f <+143>:   lea    -0x400(%ebp),%eax
   0x08059125 <+149>:   pop    %ebx
   0x08059126 <+150>:   pop    %esi
   0x08059127 <+151>:   pop    %edi
   0x08059128 <+152>:   pop    %ebp
   0x08059129 <+153>:   ret
   0x0805912a <+154>:   lea    0x0(%esi),%esi
   0x08059130 <+160>:   lea    0x4(%ebx),%edi
   0x08059133 <+163>:   mov    %ebx,%ecx
   0x08059135 <+165>:   movl   $0x0,%gs:0xfffffc00
   0x08059140 <+176>:   movl   $0x0,0x3fc(%ebx)
   0x0805914a <+186>:   sub    $0x4,%esp
   0x0805914d <+189>:   and    $0xfffffffc,%edi
   0x08059150 <+192>:   sub    %edi,%ecx
   0x08059152 <+194>:   add    $0x400,%ecx
   0x08059158 <+200>:   shr    $0x2,%ecx
   0x0805915b <+203>:   rep stos %eax,%es:(%edi)
   0x08059140 <+176>:   movl   $0x0,0x3fc(%ebx)
   0x0805914a <+186>:   sub    $0x4,%esp
   0x0805914d <+189>:   and    $0xfffffffc,%edi
   0x08059150 <+192>:   sub    %edi,%ecx
   0x08059152 <+194>:   add    $0x400,%ecx
   0x08059158 <+200>:   shr    $0x2,%ecx
   0x0805915b <+203>:   rep stos %eax,%es:(%edi)
   0x0805915d <+205>:   push   $0x400
   0x08059162 <+210>:   push   $0x805d790
   0x08059167 <+215>:   push   %ebx
   0x08059168 <+216>:   call   0x804aee0 <strncpy@plt>
   0x0805916d <+221>:   movb   $0x0,%gs:0xffffffff
   0x08059175 <+229>:   add    $0x10,%esp
   0x08059178 <+232>:   jmp    0x8059116 <gp_strerror+134>
End of assembler dump.
[builder@localhost .in]$ gcc --version
i586-alt-linux-gcc (GCC) 7.3.1 20180130 (ALT 7.3.1-alt3)