Illegal instruction (core dumped) - `wc -l`

Support
5

Kernel parameter gather_data_sampling=force is likely causing this on some CPUs on Debian bookworm based operating systems such as Kicksecure 17.

Solution: Remove the gather_data_sampling=force kernel parameter. The following commands can accomplish that.

1. Boot into sysmaint mode.

2. Comment out [1] gather_data_sampling=force in the /etc/default/grub.d/40_cpu_mitigations.cfg configuration file, sudo update-grub and reboot.

sudo str_replace 'GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX gather_data_sampling=force"' '#GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX gather_data_sampling=force"' /etc/default/grub.d/40_cpu_mitigations.cfg

3. Update GRUB configuration file.

sudo update-grub

4. Reboot.

sudo reboot

5. Done.

For reference: `gather_data_sampling=force` - Enable Gather Data Sampling (GDS) mitigation - related to CPU `AVX` instruction; More CPU Mitigations and Additional References by raja-grewal · Pull Request #218 · Kicksecure/security-misc · GitHub

[1] Comment out explanation: Commenting Syntax and Effects

1 Like