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OPERATIONAL DEFECT DATABASE
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- unexpected reload is observed on a NCS 540 router (N540-ACC-SYS running 7.6.2 and 7.7.2) with no reboot history entries seen as well as other NCS models mentioned below. - Kdump file is generated in admin harddisk: RP/0/RP0/CPU0:NCS-540#admin dir harddisk: > 15 -rw-r--r--. 1 1442293346 Jan 19 07:17 kernel.20230119-070918.core.slot0_RP0.kdump <<<< - Key signature is the following kernel BUG traces found: Example for 7.6.2: kernel BUG at /nobackup/hetsoi/satori-r76x.release.20220704/target-n9000-gdb/bitbake_build/tmp/work/n9000_gdb-wrs-linux/linux-windriver/3.14-r0/linux/security/integrity/ima/ima_policy.c:146! Example for 7.7.2: kernel BUG at /nobackup/hetsoi/satori-r77x.release.20220822/target-n9000-gdb/bitbake_build/tmp/work/n9000_gdb-wrs-linux/linux-windriver/3.14-r0/linux/security/integrity/ima/ima_policy.c:146! This can be found in Show tech os > 0_RPO > 0_RP0_host > pstore > dmesg-mtdoops-1( the dmesg file date should correspond to the unexpected reload date): -------------------------------------------------------------- [174092.662755] SELinux: 2048 avtab hash slots, 101069 rules. [174092.669987] SELinux: 6 users, 165 roles, 4427 types, 232 bools, 1 sens, 1024 cats [174092.669991] SELinux: 81 classes, 101069 rules [174092.750143] ------------[ cut here ]------------ [174092.755403] kernel BUG at /nobackup/hetsoi/satori-r76x.release.20220704/target-n9000-gdb/bitbake_build/tmp/work/n9000_gdb-wrs-linux/linux-windriver/3.14-r0/linux/security/integrity/ima/ima_policy.c:146! ...etc
- In some instances there was repetitive admin CLI output pulling by scripts, the more repetitive those polling are, the more reloads occur in a shorter span of time. - Applicable pids: BIOS 1.18 runs on Oldcastle (NCS-55A1-36H-SE-S), OldcastleCR (NCS-55A1-36H-S), Pyke (NCS-55A1-24H), Tortin (N540-24Z8Q2C-M), Bifrost-T (NCS55-A1-48Q6H), and TurinCR (NCS-55A1-24Q6H-S).
- SMU installation for CSCwh04463 has been proven to mitigate the reloads seen.
- DDTS is opened to track the investigation from the CPU side. - The complete fix is an Enhancement delivered via a new Bios integrated into XR FPD code.