Re: bash encountered a coredump issue with stepping on memory

[wang yuhang]

> The initialize_shell_variables function is processing env. When the for 
loop  
> reaches env[16], glibc needs to use the main_arena.top variable. However, 
the  
> value in the address pointed to by the top variable is overwritten by 
env[15],  
> causing a glibc exception and resulting in a coredump  
 
When the for loop reaches env, the values of each env are: 
 
(gdb) p env[0] 
$5 = 0x7ffce3c2e0bc "SHELL=/bin/bash" 
(gdb) p env[1] 
$6 = 0x7ffce3c2e0cc "REPO_PATH=/opt/pub/software" 
(gdb) p env[2] 
$7 = 0x7ffce3c2e0e8 "CURL_ALIAS=/usr/bin/curl" 
(gdb) p env[3] 
$8 = 0x7ffce3c2e101 "FIND_ALIAS=/usr/bin/find" 
(gdb) p env[4] 
$9 = 0x7ffce3c2e11a "IPMC_AGENT_ROOT=/opt/oss/manager/agent/DeployAgent" 
(gdb) p env[5] 
$10 = 0x7ffce3c2e14d "PGREP_ALIAS=/usr/bin/pgrep" 
(gdb) p env[6] 
$11 = 0x7ffce3c2e168 "FSCK_ALIAS=/usr/sbin/fsck.ext4" 
(gdb) p env[7] 
$12 = 0x7ffce3c2e187 "enableServiceIdentity=/uds" 
(gdb) p env[8] 
$13 = 0x7ffce3c2e1a2 "SUPER_ROOT=/opt/sudobin/" 
(gdb) p env[9] 
$14 = 0x7ffce3c2e1bb "HOSTNAME_ALIAS=/bin/hostname" 
(gdb) p env[10] 
$15 = 0x7ffce3c2e1d8 "SUDO_GID=2000" 
(gdb) p env[11] 
$16 = 0x7ffce3c2e1e6 "HISTCONTROL=" 
(gdb) p env[12] 
$17 = 0x7ffce3c2e1f3 "MKFIFO_ALIAS=/usr/bin/mkfifo" 
(gdb) p env[13] 
$18 = 0x7ffce3c2e210 "CHOWN_ALIAS=/bin/chown" 
(gdb) p env[14] 
$19 = 0x7ffce3c2e227 "BASH_ALIAS=/bin/bash" 
(gdb) p env[15] 
$20 = 0x7ffce3c2e23c "PROCESS_NAME=hofsosdfileagent" 
(gdb) p env[16] 
$21 = 0x7ffce3c2e25a "DIRNAME_ALIAS" 
(gdb) p env[17] 
$22 = 0x7ffce3c2e279 "PID="