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 <corbet@xxxxxxx> To: Eric Biederman <ebiederm@xxxxxxxxxxxx> Cc: linux-doc@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Cc: kexec@xxxxxxxxxxxxxxxxxxx Cc: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx> Cc: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx> Cc: Ross Zwisler <zwisler@xxxxxxxxxx> To: Philipp Rudo <prudo@xxxxxxxxxx> To: Guilherme G. Piccoli <gpiccoli@xxxxxxxxxx> Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx> --- Changes in v3: - s/paramter/parameter/ Thanks Ghilherme! - s/permited/permitted/ Thanks Joel! - Link to v2: https://lore.kernel.org/r/20221114-disable-kexec-reset-v2-0-c498313c1bb5@xxxxxxxxxxxx Changes in v2: - Instead of kexec_reboot_disabled, add two new counters (Thanks Philipp!) - Link to v1: https://lore.kernel.org/r/20221114-disable-kexec-reset-v1-0-fb51d20cf871@xxxxxxxxxxxx --- Ricardo Ribalda (3): Documentation: sysctl: Correct kexec_load_disabled kexec: Factor out kexec_load_permitted kexec: Introduce parameters load_limit_reboot and load_limit_panic Documentation/admin-guide/kernel-parameters.txt | 14 ++++ Documentation/admin-guide/sysctl/kernel.rst | 7 +- include/linux/kexec.h | 3 +- kernel/kexec.c | 2 +- kernel/kexec_core.c | 98 ++++++++++++++++++++++++- kernel/kexec_file.c | 2 +- 6 files changed, 119 insertions(+), 7 deletions(-) --- base-commit: 479174d402bcf60789106eedc4def3957c060bad change-id: 20221114-disable-kexec-reset-19b7e117338f Best regards, -- Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
