[CentOS] Strange Network Bug Locks Up CentOS 7 Laptop

Mon Jun 24 14:24:01 UTC 2019
mark <m.roth at 5-cent.us>

Virgo, Paul E. \(GSFC-610.2\)\[ADNET SYSTEMS INC\] via CentOS wrote:
> All,
> I have a user who has a Dell Precision 7520 laptop, and we're running
> CentOS 7, latest kernel.
> This morning he had two lockup incidents. Nothing in /var/log/messages
> stands out so far, but did get this information when running 'abrt-cli
> list --since 1560891312':
> id c48278a875c27dd4369d971bcfc7db4267766c6d reason:         WARNING: CPU:
> 0 PID: 0 at net/sched/sch_generic.c:356 dev_watchdog+0x248/0x260 time:
> Thu 23 May 2019 07:12:57 PM EDT
> cmdline:        BOOT_IMAGE=/vmlinuz-3.10.0-957.12.1.el7.x86_64
> root=/dev/mapper/SysVG00-ROOT ro crashkernel=auto rd.lvm.lv=SysVG00/ROOT
> rd.luks.uuid=luks-29590e52-c08e-4c11-a784-cf2f3ffd98b2
> rd.lvm.lv=SysVG00/SWAP rhgb quiet LANG=en_US.UTF-8 package:        kernel
> uid:            0 (root)
> count:          4
> Directory:      /var/spool/abrt/oops-2019-05-23-19:12:57-28561-0
> Reported:       cannot be reported
> Has anyone seen this behavior before or this message? Seems like
> something related to network scheduling (?) or something. Any feedback
> would be appreciated. Thanks.
Hi, Paul,

   I just searched on sch_generic.c:356, and found a number of things,
intluding bugs from last year. I looked at the code - not sure if it's
the same version, but it looks to me as though it may possibly be
related to an issue with the network connection. If so, then it's check
the cable, check the port on the router... or look for hardware errors
on the laptop.