Failed to load module [veeamsnap] on Oracle Linux 8 with UEK R7 kernel
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Challenge
When running Oracle Linux 8 with UEK R7 kernel (5.15+):
[root@localhost ~]# cat /etc/oracle-release Oracle Linux Server release 8.7 [root@localhost ~]# uname -r 5.15.0-4.70.5.2.el8uek.x86_64
Veeam Agent for Linux backup job fails with "Failed to load module [veeamsnap] error":
[error] Failed to load module [veeamsnap] with parameters [zerosnapdata=1 debuglogging=0 snapstore_block_size_pow=14 change_tracking_block_size_pow=18 logdir=/var/lo... [error] Processing finished with errors
Cause
UEK R7 is built with GCC 11, while Oracle Linux 8 ships GCC 8.5. This causes veeamsnap kernel module build failure because DKMS uses GCC 8.5:
make.log DKMS make.log for veeamsnap-5.0.2.4619 for kernel 5.15.0-4.70.5.2.el8uek.x86_64 (x86_64) make: Entering directory '/usr/src/kernels/5.15.0-4.70.5.2.el8uek.x86_64' warning: the compiler differs from the one used to build the kernel The kernel was built by: gcc (GCC) 11.2.1 20220127 (Red Hat 11.2.1-9.1.0.2) You are using: gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-15.0.1) CC [M] /var/lib/dkms/veeamsnap/5.0.2.4619/build/log.o gcc: error: unrecognized command line option ‘-ftrivial-auto-var-init=zero’ gcc: error: unrecognized command line option ‘-fzero-call-used-regs=used-gpr’ make[1]: *** [scripts/Makefile.build:288: /var/lib/dkms/veeamsnap/5.0.2.4619/build/log.o] Error 1 make: *** [Makefile:1974: /var/lib/dkms/veeamsnap/5.0.2.4619/build] Error 2 make: Leaving directory '/usr/src/kernels/5.15.0-4.70.5.2.el8uek.x86_64'
Solution
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You must rebuild the veeamsnap module using Software Collection (SCL) for GCC 11. SCL for GCC 11 is shipped with UEK R7 kernel.
- Contact Veeam Technical Support for Veeam Agent for Linux build 5.0.2.4619.
- Remove Veeam Agent for Linux 5.0.2.4567.
- Install veeam-5.0.2.4619-1.el8.x86_64.rpm and veeamsnap-5.0.2.4619-1.noarch.rpm packages
- Make sure that kernel-uek-devel package matching your running kernel is installed:
[root@localhost ~]# rpm -qa | grep kernel-uek-devel-$(uname -r) kernel-uek-devel-5.15.0-4.70.5.2.el8uek.x86_64
- Check dkms status output. veeamsnap/5.0.2.4619 must have added status:
[root@localhost ~]# dkms status veeamsnap/5.0.2.4619: added
- Build veeamsnap/5.0.2.4619 with dkms using GCC 11 SCL:
[root@localhost ~]# scl enable gcc-toolset-11 -- dkms install -m veeamsnap/5.0.2.4619 --force Sign command: /lib/modules/5.15.0-4.70.5.2.el8uek.x86_64/build/scripts/sign-file Signing key: /var/lib/dkms/mok.key Public certificate (MOK): /var/lib/dkms/mok.pub Deprecated feature: REMAKE_INITRD Running the pre_build script: Real System.map was found in '/lib/modules/5.15.0-4.70.5.2.el8uek.x86_64/System.map' Generate "/var/lib/dkms/veeamsnap/5.0.2.4619/build/config.h" for kernel "5.15.0-4.70.5.2.el8uek.x86_64". System map "/lib/modules/5.15.0-4.70.5.2.el8uek.x86_64/System.map". Exported function "blk_mq_make_request" not found Exported function "blk_alloc_queue_rh" not found Exported function "submit_bio_noacct" was found Address of the function "__request_module" was defined Address of the function "blk_mq_submit_bio" was defined Building module: Cleaning build area... make -j1 KERNELRELEASE=5.15.0-4.70.5.2.el8uek.x86_64 -C /lib/modules/5.15.0-4.70.5.2.el8uek.x86_64/build M=/var/lib/dkms/veeamsnap/5.0.2.4619/build modules......... Signing module /var/lib/dkms/veeamsnap/5.0.2.4619/build/veeamsnap.ko Cleaning build area... veeamsnap.ko.xz: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/5.15.0-4.70.5.2.el8uek.x86_64/extra/ depmod....
- Verify that veeamsnap/5.0.2.4619 has installed status for the kernel you are running:
[root@localhost ~]# uname -r 5.15.0-4.70.5.2.el8uek.x86_64 [root@localhost ~]# dkms status veeamsnap/5.0.2.4619, 5.15.0-4.70.5.2.el8uek.x86_64, x86_64: installed
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