rooter

[root@APASRV5 tmp]# gdb searchd core-searchd-11-497-498-64707-1447938252
GNU gdb (GDB) Red Hat Enterprise Linux (7.2-75.el6)
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/searchd...Reading symbols from /usr/lib/debug/usr/bin/searchd.debug...done.
done.
[New Thread 64707]
[New Thread 64708]
[New Thread 64710]
[New Thread 64714]
[New Thread 64711]
[New Thread 64709]
[New Thread 64712]
Reading symbols from /usr/lib64/mysql/libmysqlclient.so.18...done.
.......
Core was generated by `/usr/bin/searchd --config /etc/sphinx/sphinx.conf'.
Program terminated with signal 11, Segmentation fault.
#0  0x0000000000420c12 in CheckFlush () at searchd.cpp:18828
18828		if ( g_pFlush->m_bFlushing )

(gdb) disas
Dump of assembler code for function CheckFlush():
   0x0000000000420c00 <+0>:	push   rbp
   0x0000000000420c01 <+1>:	mov    rbp,rsp
   0x0000000000420c04 <+4>:	push   r12
   0x0000000000420c06 <+6>:	push   rbx
   0x0000000000420c07 <+7>:	sub    rsp,0x40
   0x0000000000420c0b <+11>:	mov    rax,QWORD PTR [rip+0x593ace]        # 0x9b46e0
=> 0x0000000000420c12 <+18>:	mov    edx,DWORD PTR [rax]

(gdb) info register
rax            0x7f8435f48000	140205817626624
rbx            0x0	0

(gdb) x/x $rax
0x7f8435f48000:	Cannot access memory at address 0x7f8435f48000



Source

void CheckFlush ()
{
	if ( g_pFlush->m_bFlushing ) <==== NULL
		return;