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SA6400 Kernel-5.10 Bulid TCP_BBR Module Encounter Unknown symbol Error

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Dmesg Show Unknown symbol error, ask for help

tcp_bbr: Unknown symbol __ubsan_handle_divrem_overflow (err -2)
tcp_bbr: Unknown symbol __ubsan_handle_shift_out_of_bounds (err -2)
tcp_bbr: Unknown symbol __ubsan_handle_type_mismatch_v1 (err -2)
tcp_bbr: Unknown symbol __ubsan_handle_load_invalid_value (err -2)


This is the operation process:

Download ToolChain

wget https://cndl.synology.cn/download/ToolChain/toolchain/7.2-63134/AMD%20x86%20Linux%20Linux%205.10.55%20%28epyc7002%29/epyc7002-gcc1220_glibc236_x86_64-GPL.txz
tar -Jxf epyc7002-gcc1220_glibc236_x86_64-GPL.txz


Download Linux-5.10.55 src

wget https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/linux-5.10.55.tar.gz
tar -xzvf linux-5.10.55.tar.gz



Prepare for cross compilation

export ARCH=amd64
export CROSS_COMPILE=/home/parallels/synology/x86_64-pc-linux-gnu/bin/x86_64-pc-linux-gnu-
make menuconfig
make prepare
make scripts


Compile a single module

make  M=net/ipv4/ CONFIG_TCP_CONG_BBR=m clean
make  M=net/ipv4/ CONFIG_TCP_CONG_BBR=m modules


Install module

sudo cp /volume1/Exchange/tcp_bbr.ko /lib/modules/
sudo chmod 644 /lib/modules/tcp_bbr.ko
sudo insmod /lib/modules/tcp_bbr.ko


Encounter Error

Version Magic Error


tcp_bbr: version magic '5.10.55 SMP mod_unload modversions ' should be '5.10.55+ SMP mod_unload '

Edit File /linux-5.10.55/include/generated/utsrelease.h

#define UTS_RELEASE "5.10.55+"


-fstack-protector-strong Error


tcp_bbr: Unknown symbol __stack_chk_fail (err -2)

Edit File /linux-5.10.55/Makefile

stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := 



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