Kernel warning: 0010:iov_iter_pipe.cold**

[erikwihlborg76]

Hi! I´ve been running Promox 6.x w/ kernel 5.3.13-1-pve trying out openwrt1907-rc2 but something is causing the kernel to throw a warning, please see attached files for more context.

There´s a lot of wildcards in this mix, the "free" and probably a bit more unstable proxmox repo, an openwrt release. As soon as I disabled the LXC openwrt container I no longer got these kernel warnings. The container is unprivileged

Any ideas why may be causing it?

load_kernel_modules_hook.sh.txt
openwrt.common.conf.txt
proxmox container settings.txt
dmesg.txt

[mikma]

I haven't seen the warning, but I don't run openwrt containers on Proxmox, LXC or 5.3.x kernels.

I'll add a link to the bug report in Proxmox' bugzilla:
Bug 2524: Kernel crash related to lib/iov_iter.c

[DazzyWalkman]

I see that you are loading some kernel modules for sqm. 19.07 is compiled against kernel 4.14, while host is running kernel 5.3.

I did notice in my case, openwrt snapshot compiled against kernel 5.4, running on top on Proxmox VE 6.x w/ kernel 5.3 pve, would triger some sorts of kernel panic and the container was configured with some network interfaces.
All would be fine if the container was running without any network interface. And panics disappeared after host switched to pve kernel 5.4.

Maybe it's caused by a misalignment of kernel functions, for the host and the container.