[mpich-devel] mpirun fails if there is a void environment variable

[Дмитрий]

Hello,

i've found that on my system mpirun /bin/hostname causes segmentation
fault. Inspecting it in gdb, i've seen the following stack trace:

(gdb) run /bin/hostname
Starting program: /usr/bin/mpirun /bin/hostname
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff69c484a in ?? () from /lib64/libc.so.6
(gdb) bt
#0  0x00007ffff69c484a in ?? () from /lib64/libc.so.6
#1  0x0000000000430455 in HYDTI_bscd_in_env_list (env_name=0x0,
env_list=env_list at entry=0x7fffffffd890) at
tools/bootstrap/external/external_common.c:27
#2  0x0000000000425ae4 in HYDT_bscd_ssh_query_env_inherit
(env_name=<optimized out>, ret=0x7fffffffd8e4) at
tools/bootstrap/external/ssh_env.c:17
#3  0x000000000042557c in HYDT_bsci_query_env_inherit
(env_name=<optimized out>, ret=ret at entry=0x7fffffffd8e4) at
tools/bootstrap/src/bsci_env.c:18
#4  0x00000000004208d3 in HYDU_list_inherited_env
(env_list=env_list at entry=0x66c680 <HYD_server_info+128>) at
utils/env/env.c:55
#5  0x000000000040404c in main (argc=<optimized out>, argv=<optimized
out>) at ui/mpich/mpiexec.c:258

The problem seems to be in strcmp call, which compares NULL (empty
named environment variable) with something. env command shows string
"=" for me.

So, I guess it would be nice to check env_name variable before passing
it to strcmp?

-- 
Regards,
    Dmitriy