resolving symbols with FORTIFY_SOURCE?
Hi,
How exactly do you resolve the symbols with crashes caused by software
compiled with FORTIFY_SOURCE=2?
I'm seeing a crash in xsupplicant (from extras) and would like to get
it fixed, but as the program is halted by glibc/kernel, I can't run
gdb on it to backtrace and to get the symbols. Installing debuginfo
doesn't help; debuginfo can be used to find the symbols manually (w/
objdump) but doing so would be a lot of work though.
I googled around quite a bit but couldn't find any automation or help
(akin to old 'ksymoops') in decoding the numbers. There's very
probably something, but I just can't find it. Or if there isn't, we
should certainly merge it.
Any pointers?
................
[root@dhcp-142 tmp]# *** buffer overflow detected ***: xsupplicant terminated
======= Backtrace: =========
/lib/libc.so.6(__chk_fail+0x41)[0xa43c45]
xsupplicant[0x8069a77]
xsupplicant[0x806a189]
xsupplicant[0x806a641]
xsupplicant[0x806a6e6]
xsupplicant[0x806a84e]
xsupplicant[0x806bdfa]
xsupplicant[0x804b0bd]
xsupplicant[0x804b243]
/lib/libc.so.6(__libc_start_main+0xdf)[0x97ad5f]
xsupplicant[0x804a7d1]
======= Memory map: ========
004cb000-004da000 r-xp 00000000 03:01 64194 /lib/libresolv-2.3.5.so
004da000-004db000 r-xp 0000e000 03:01 64194 /lib/libresolv-2.3.5.so
004db000-004dc000 rwxp 0000f000 03:01 64194 /lib/libresolv-2.3.5.so
004dc000-004de000 rwxp 004dc000 00:00 0
004e0000-004e2000 r-xp 00000000 03:01 68214 /lib/libcom_err.so.2.1
004e2000-004e3000 rwxp 00001000 03:01 68214 /lib/libcom_err.so.2.1
004e5000-004fc000 r-xp 00000000 03:01 187614 /usr/lib/libgssapi_krb5.so.2.2
004fc000-004fd000 rwxp 00017000 03:01 187614 /usr/lib/libgssapi_krb5.so.2.2
004ff000-0056e000 r-xp 00000000 03:01 187613 /usr/lib/libkrb5.so.3.2
0056e000-00571000 rwxp 0006e000 03:01 187613 /usr/lib/libkrb5.so.3.2
00573000-00596000 r-xp 00000000 03:01 187612 /usr/lib/libk5crypto.so.3.0
00596000-00597000 rwxp 00023000 03:01 187612 /usr/lib/libk5crypto.so.3.0
00599000-0059b000 r-xp 00000000 03:01 180990 /usr/lib/libkrb5support.so.0.0
0059b000-0059c000 rwxp 00001000 03:01 180990 /usr/lib/libkrb5support.so.0.0
0059e000-005d3000 r-xp 00000000 03:01 68216 /lib/libssl.so.0.9.7f
005d3000-005d6000 rwxp 00035000 03:01 68216 /lib/libssl.so.0.9.7f
005d8000-006d0000 r-xp 00000000 03:01 68215 /lib/libcrypto.so.0.9.7f
006d0000-006e2000 rwxp 000f8000 03:01 68215 /lib/libcrypto.so.0.9.7f
006e2000-006e5000 rwxp 006e2000 00:00 0
006f2000-006fb000 r-xp 00000000 03:01 68212 /lib/libgcc_s-4.0.1-20050727.so.1
006fb000-006fc000 rwxp 00009000 03:01 68212 /lib/libgcc_s-4.0.1-20050727.so.1
00948000-00962000 r-xp 00000000 03:01 68207 /lib/ld-2.3.5.so
00962000-00963000 r-xp 00019000 03:01 68207 /lib/ld-2.3.5.so
00963000-00964000 rwxp 0001a000 03:01 68207 /lib/ld-2.3.5.so
00966000-00a89000 r-xp 00000000 03:01 68208 /lib/libc-2.3.5.so
00a89000-00a8b000 r-xp 00123000 03:01 68208 /lib/libc-2.3.5.so
00a8b000-00a8d000 rwxp 00125000 03:01 68208 /lib/libc-2.3.5.so
00a8d000-00a8f000 rwxp 00a8d000 00:00 0
00ab8000-00aba000 r-xp 00000000 03:01 68210 /lib/libdl-2.3.5.so
00aba000-00abb000 r-xp 00001000 03:01 68210 /lib/libdl-2.3.5.so
00abb000-00abc000 rwxp 00002000 03:01 68210 /lib/libdl-2.3.5.so
00abe000-00ad0000 r-xp 00000000 03:01 173735 /usr/lib/libz.so.1.2.2.2
00ad0000-00ad1000 rwxp 00011000 03:01 173735 /usr/lib/libz.so.1.2.2.2
00fc0000-00fc1000 r-xp 00fc0000 00:00 0 [vdso]
08048000-08083000 r-xp 00000000 03:01 175223 /usr/sbin/xsupplicant
08083000-08084000 rw-p 0003b000 03:01 175223 /usr/sbin/xsupplicant
08084000-08085000 rw-p 08084000 00:00 0
09738000-09759000 rw-p 09738000 00:00 0 [heap]
b7fba000-b7fbe000 rw-p b7fba000 00:00 0
b7fc9000-b7fcc000 rw-p b7fc9000 00:00 0
bfab7000-bfacc000 rw-p bfab7000 00:00 0 [stack]
--
Pekka Savola "You each name yourselves king, yet the
Netcore Oy kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings