Fails to load linprocfs

Hello,

I updated both host and poudriere jail from r367172 to r367418. But
after that `poudriere bulk` fails as following.

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yasu_at_rolling-vm-freebsd1[1014]% uname -a
FreeBSD rolling-vm-freebsd1.home.utahime.org 13.0-CURRENT FreeBSD 13.0-CURRENT #0 r367418: Sat Nov  7 02:00:32 JST 2020     rootz_at_rolling-vm-freebsd1.home.utahime.org:/usr0/freebsd/base/obj/usr0/freebsd/base/head/amd64.amd64/sys/GENERIC  amd64
yasu_at_rolling-vm-freebsd1[1014]% sudo -i poudriere bulk -j curamd64 -z LocalSetting -f /usr/local/etc/ports-list.txt
kldload: an error occurred while loading module linprocfs. Please check dmesg(8) for more details.
[00:00:00] Error: Required kernel module 'linprocfs' not found
yasu_at_rolling-vm-freebsd1[1015]%
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Executing `sudo -i kldload linprocfs.ko` results in same error.

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yasu_at_rolling-vm-freebsd1[1016]% sudo -i kldload linprocfs.ko
kldload: an error occurred while loading module linprocfs.ko. Please check dmesg(8) for more details.
yasu_at_rolling-vm-freebsd1[1017]% 
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dmesg(8) shows following error messages.

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link_elf_obj: symbol sdt_provider_linuxulator undefined
linker_load_file: /boot/kernel/linux_common.ko - unsupported file type
KLD linprocfs.ko: depends on linux_common - not available or version mismatch
linker_load_file: /boot/kernel/linprocfs.ko - unsupported file type
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What's wrong?

Best Regards.

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Yasuhiro KIMURA