diff options
| author | Laura Abbott <lauraa@codeaurora.org> | 2017-09-08 16:16:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-08 18:26:50 -0700 |
| commit | 121388a31362b0d3176dc1190ac8064b98a61b20 (patch) | |
| tree | d42a282f3f250a7410d0b841b291bdf8fb0cd403 /init/main.c | |
| parent | 9367bb730e4d9d85a8911a08a3542ec2aa873d37 (diff) | |
| download | lwn-121388a31362b0d3176dc1190ac8064b98a61b20.tar.gz lwn-121388a31362b0d3176dc1190ac8064b98a61b20.zip | |
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>
Diffstat (limited to 'init/main.c')
| -rw-r--r-- | init/main.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/init/main.c b/init/main.c index 949306bb5b6a..ae5d1fd78081 100644 --- a/init/main.c +++ b/init/main.c @@ -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(); |