Add two parameter to specify how many times a kexec kernel can be loaded. These parameter allow hardening the system.
While we are at it, fix a documentation issue and refactor some code. To: Jonathan Corbet <[email protected]> To: Eric Biederman <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Joel Fernandes (Google) <[email protected]> Cc: Sergey Senozhatsky <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Ross Zwisler <[email protected]> To: Philipp Rudo <[email protected]> To: Guilherme G. Piccoli <[email protected]> Signed-off-by: Ricardo Ribalda <[email protected]> --- Changes in v4 (Thanks Steven!): - Uses sysctl instead or module_parameters - Pass image type instead of boolean to permitted - Fix typo on flag handling - Return -EINVAL for values that does not change the current value. - Link to v3: https://lore.kernel.org/r/[email protected] Changes in v3: - s/paramter/parameter/ Thanks Ghilherme! - s/permited/permitted/ Thanks Joel! - Link to v2: https://lore.kernel.org/r/[email protected] Changes in v2: - Instead of kexec_reboot_disabled, add two new counters (Thanks Philipp!) - Link to v1: https://lore.kernel.org/r/[email protected] --- Ricardo Ribalda (3): Documentation: sysctl: Correct kexec_load_disabled kexec: Factor out kexec_load_permitted kexec: Introduce sysctl parameters kexec_load_limit_* Documentation/admin-guide/sysctl/kernel.rst | 25 +++++++- include/linux/kexec.h | 3 +- kernel/kexec.c | 4 +- kernel/kexec_core.c | 96 ++++++++++++++++++++++++++++- kernel/kexec_file.c | 11 ++-- 5 files changed, 129 insertions(+), 10 deletions(-) --- base-commit: 479174d402bcf60789106eedc4def3957c060bad change-id: 20221114-disable-kexec-reset-19b7e117338f Best regards, -- Ricardo Ribalda <[email protected]> _______________________________________________ kexec mailing list [email protected] http://lists.infradead.org/mailman/listinfo/kexec
