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scs: Add page accounting for shadow call stack allocations

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This change adds accounting for the memory allocated for shadow stacks.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Sami Tolvanen
2020-04-27 09:00:08 -07:00
committed by Will Deacon
parent d08b9f0ca6
commit 628d06a48f
6 changed files with 37 additions and 0 deletions
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6
mm/page_alloc.c
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@@ -5411,6 +5411,9 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
" managed:%lukB"
" mlocked:%lukB"
" kernel_stack:%lukB"
#ifdef CONFIG_SHADOW_CALL_STACK
" shadow_call_stack:%lukB"
#endif
" pagetables:%lukB"
" bounce:%lukB"
" free_pcp:%lukB"
@@ -5433,6 +5436,9 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
K(zone_managed_pages(zone)),
K(zone_page_state(zone, NR_MLOCK)),
zone_page_state(zone, NR_KERNEL_STACK_KB),
#ifdef CONFIG_SHADOW_CALL_STACK
zone_page_state(zone, NR_KERNEL_SCS_KB),
#endif
K(zone_page_state(zone, NR_PAGETABLE)),
K(zone_page_state(zone, NR_BOUNCE)),
K(free_pcp),