Troubleshooting
Problem
Red Hat Enterprise Linux (RHEL) comes with a feature called Security Enhanced Linux (SELinux). Using the default RHEL installation choices and the default SELinux configuration, CS Linux will not start properly.
Symptom
When SELinux is enforcing, you may see entries similar to the following in /var/log/messages:
:
snastart: FATAL: Error inserting streams
(/lib/modules/2.6.9-22.EL/misc/streams.ko): Permission denied
snastart: Error: Could not load streams driver
snastart: Refer to the readme file for further information
snastart: CS Linux cannot start because drivers failed to load
snastart: Refer to the readme file for further information
SELinux: initialized (dev LiS, type LiS), not configured for labeling
Linux Streams Subsystem failed to register its file system (-13). :If you later logon as root and attempt to initiate the /etc/init.d/snastart manually, you will may a kernel oops similar to the following:
:
Linux STREAMS Subsystem loading...
kmem_cache_create: duplicate cache LiS-Atomic-200
kernel BUG at mm/slab.c:1453!
EIP is at kmem_cache_create+0x417/0x48a
Process modprobe (pid: 2561, threadinfo=c4ef6000 task=c4212c70)
vprintk+0x22d/0x29d
lis_mem_init+0x3d/0x58 [streams]
lis_init_module+0x27/0x16c [streams]
sys_init_module+0x1f1/0x2d9
syscall_call+0x7/0xb
:Another symptom seen from when SELinux is set for 'enforcing' could be a failure to start Enterprise Extender (HPR/IP) links. The sna.err log may record:
:
2021-06-08 19:30:14 EDT 4099-15(0-1) E (snalab.ibm.com) PID 3990 (snadaemon)
Failed to open device /dev/sna_HPRIP.
Errno = 6
2021-06-08 19:30:14 EDT 4099-22(0-1) P (snalab.ibm.com) PID 3990 (snadaemon)
Failed to open Streams for DLC IP0, failure code 2
:
[{"Line of Business":{"code":"LOB70","label":"Z TPS"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSKK8Z","label":"Communications Server for Data Center Deployment"},"ARM Category":[{"code":"a8m0z0000001jSmAAI","label":"Comm Server DSD Linux V7"},{"code":"a8m0z0000001jSiAAI","label":"Comm Server Linux Sys Z V6"},{"code":"a8m0z0000001jSrAAI","label":"Comm Server Linx86"},{"code":"a8m0z0000001jSjAAI","label":"Comm Server Linxppc V6"}],"Platform":[{"code":"PF016","label":"Linux"}],"Version":"7.0.0;and future releases","Type":"MASTER"}]
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Document Information
Modified date:
10 June 2021
UID
swg21229399