Connectrix B-series: Switch DS_6630B rebooted unexpectedly
Summary: Switch DS_6630B rebooted unexpectedly.
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Symptoms
Switch running on v8.2.0b rebooted due to Kernel panic:
errdump :
[HAM-1004], 1028, CHASSIS, INFO, DS_6630B, Processor rebooted - Software Fault:Kernel Panic.
pdshow :
SWD: SWD:swd_scan_timer:fcp(2494) failed to refresh (1868538494:1868
SWD: SWD:swd_scan_timer:ts(2513) failed to refresh (1868538512:18685
SWD: SWD:swd_close_proc:Detected termination of tsd0:2513 (1)
SWD: SWD:swd_close_proc:exit code:134, exit sig:17, parent sig:0
Unable to handle kernel paging request for data at address 0x0bf39198
Faulting instruction address: 0xc22cdd3c
Oops taken on: 2019-09-22 at 18:08:12:216599
Oops: Kernel access of bad area, sig: 11 [#1]
PREEMPT SMP NR_CPUS=4 LTT NESTING LEVEL : 0
SILKWORM_EMBEDDED
NIP: c22cdd3c LR: c22cdc88 CTR: c22cdf30
REGS: 85157970 TRAP: 0300 Tainted: P (2.6.34.6)
MSR: 00029002 <EE,ME,CE> CR: 22004442 XER: 00000000
DEAR: 0bf39198, ESR: 00800000
TASK = 88b00000[2513] 'tsd0' THREAD: 85154000
Last syscall: -1 CPU: 1
GPR00: 4c738fd8 85157a20 88b00000 bf980000 00000000 bf800000 85157a68 05e40160
GPR08: 00000000 4e800435 0592a2c1 bf8001c0 00030d26 10bec040 418004fc 85157f50
GPR16: c2cdecbc c2ce0000 c2cdf928 c2cdece0 c3dddc0c 96922b00 ffffffff 00000001
GPR24: 0000021e 00000005 7f64db79 00000041 85157a68 bf980000 0bf39198 85157a20
NIP [c22cdd3c] trace_store_lvl+0x124/0x318 [trace_module]
LR [c22cdc88] trace_store_lvl+0x70/0x318 [trace_module]
Call Trace:
STACK MAGIC 0x57ac6e9d
[85157a20] [c22cdc88] trace_store_lvl+0x70/0x318 [trace_module] (unreliable)
[85157a50] [c22cdf5c] trace_store+0x2c/0x44 [trace_module]
[85157a60] [c3dda130] rliq_enqueue+0x54/0x3ac [raslog_module]
[85157b50] [c3ddc314] rasevt_log2+0x334/0x4a0 [raslog_module]
[85157bc0] [c2cdcb80] swd_close_proc+0x34c/0x6a4 [hasm_module]
[85157cc0] [c2cdcfa0] swd_close+0x84/0xa0 [hasm_module]
[85157d10] [40126e80] __fput+0x100/0x200
[85157d30] [40126fc8] fput+0x48/0x60
[85157d40] [4012244c] filp_close+0x7c/0xb8
[85157d60] [40052690] put_files_struct+0x134/0x170
[85157d90] [40052720] exit_files+0x54/0x6c
[85157db0] [4005459c] do_exit+0x1d4/0x74c
[85157e00] [40054b6c] do_group_exit+0x58/0xb8
[85157e20] [4006b8e4] get_signal_to_deliver+0x2e4/0x430
[85157e70] [4000a6f0] do_signal+0x8c/0x274
[85157f40] [40013a74] do_user_signal+0x74/0xc4
Instruction dump:
7d4a5b78 7f9a3840 7d265378 419d010c 817d0010 381affff 81250004 7c005838
39290014 396501c0 7c0049d6 7fcb0214 <7eeb012e> b37e0008 b31e000a 933e0004
last sysfs file: /sys/kernel/slab/kmalloc_dma-4096/trace
PowerPC Book-E Watchdog Shutdown soft timer
PD start
[panic_dump_save]: collecting panicdump
OOM_DUMP
PDTRACE
Start WM tracedump
End WM tracedump; Wmem 0x3054639501:65536 addr=bf995000:bf995004 Magic=0x3054639501:65536
reboot_reason
PLATFORM
sysmodPanicdump size=1440
MLT
MLT_KL
MLT_VM
PD_MISC
CONSOLE_LOG
pdex failed on /core_files/panic/core.pd20190922183814 for MTRACER \(0\)
Cause
Brocade Engineering have advised the backtrace in panic dump looks similar to a known trace module corruption issue.
There is a preventive fix that went in 8.2.1c (FOS-803011).
Defect details: FOS-803011
Symptom: Switch panic due to kernel trace module corruption. It also prevents the user daemon generate proper core file during the daemon coredump.
Condition: It happens when the user daemon coredumps, and FFDC triggers to log a trace.
Closed in Releases: FOS8.1.2h(Implemented), FOS8.2.1c(Implemented), FOS8.2.2(Implemented)
Resolution
Upgrade the switch to a fixed version.
Affected Products
Connectrix DS-6630BProducts
Connectrix DS-6630BArticle Properties
Article Number: 000055631
Article Type: Solution
Last Modified: 23 May 2025
Version: 4
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