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init: move stack canary initialization after setup_arch 

Patch series "Command line randomness", v3.

A series to add the kernel command line as a source of randomness.

This patch (of 2):

Stack canary intialization involves getting a random number.  Getting this
random number may involve accessing caches or other architectural specific
features which are not available until after the architecture is setup.
Move the stack canary initialization later to accommodate this.

Link: http://lkml.kernel.org/r/20170816231458.2299-2-labbott@redhat.com
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Daniel Micay <danielmicay@gmail.com>
Cc: Nick Kralevich <nnk@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Laura Abbott 2017-09-08 16:16:17 -07:00 committed by Linus Torvalds
parent 9367bb730e
commit 121388a313
1 changed files with 5 additions and 6 deletions
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11
init/main.c
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@ -515,12 +515,6 @@ asmlinkage __visible void __init start_kernel(void)
smp_setup_processor_id();
debug_objects_early_init();
/*
* Set up the initial canary ASAP:
*/
add_latent_entropy();
boot_init_stack_canary();
cgroup_init_early();
local_irq_disable();
@ -534,6 +528,11 @@ asmlinkage __visible void __init start_kernel(void)
page_address_init();
pr_notice("%s", linux_banner);
setup_arch(&command_line);
/*
* Set up the the initial canary and entropy after arch
*/
add_latent_entropy();
boot_init_stack_canary();
mm_init_cpumask(&init_mm);
setup_command_line(command_line);
setup_nr_cpu_ids();