Make bdev_allow_write_mounted kernel parameter optional#362
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assisted-by-ai wants to merge 1 commit intoKicksecure:masterfrom
Open
Make bdev_allow_write_mounted kernel parameter optional#362assisted-by-ai wants to merge 1 commit intoKicksecure:masterfrom
assisted-by-ai wants to merge 1 commit intoKicksecure:masterfrom
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Causes breakages with disk management operations such as disk resizing and VDI compaction in virtual machines. Kicksecure#334 https://forums.whonix.org/t/kernel-hardening-security-misc/7296/609 https://forums.whonix.org/t/how-to-compress-and-prevent-vdi-from-ballooning-after-each-update-deleting-large-files/22675/9 https://forums.kicksecure.com/t/resizing-disk-for-guest-in-kvm/1657 https://claude.ai/code/session_01Cd9ka8sC7zLUvB31V4kxMk
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Grow/shrink virtual hard disk versus
Issues with Firmware updates, |
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Summary
This change makes the
bdev_allow_write_mounted=0kernel hardening parameter optional by commenting it out in the default GRUB configuration, while updating documentation to reflect potential compatibility issues.Key Changes
bdev_allow_write_mounted=0kernel parameter inetc/default/grub.d/40_kernel_hardening.cfgDetails
The
bdev_allow_write_mounted=0parameter prevents privileged processes from writing to mounted block devices, protecting against filesystem corruption and kernel crashes. However, this parameter can interfere with legitimate disk management operations such as:By making this parameter optional (disabled by default), users can choose to enable it based on their security requirements and use case compatibility. The documentation now clearly indicates this is an optional hardening feature with potential operational trade-offs.
bdev_allow_write_mounted=0#334https://claude.ai/code/session_01Cd9ka8sC7zLUvB31V4kxMk