>From b297b06ca93a124f450c06ea41b9b0d761ca3402 Mon Sep 17 00:00:00 2001 From: Marco Elver Date: Sun, 5 Sep 2021 16:56:43 +0200 Subject: [PATCH 2/4] kasan: common: provide can_alloc in kasan_save_stack() Add another argument, can_alloc, to kasan_save_stack() which is passed as-is to __stack_depot_save(). No functional change intended. Signed-off-by: Marco Elver --- mm/kasan/common.c | 6 +++--- mm/kasan/generic.c | 2 +- mm/kasan/kasan.h | 2 +- 3 files changed, 5 insertions(+), 5 deletions(-) diff --git a/mm/kasan/common.c b/mm/kasan/common.c index 2baf121fb8c5..3e0999892c36 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -30,20 +30,20 @@ #include "kasan.h" #include "../slab.h" -depot_stack_handle_t kasan_save_stack(gfp_t flags) +depot_stack_handle_t kasan_save_stack(gfp_t flags, bool can_alloc) { unsigned long entries[KASAN_STACK_DEPTH]; unsigned int nr_entries; nr_entries = stack_trace_save(entries, ARRAY_SIZE(entries), 0); nr_entries = filter_irq_stacks(entries, nr_entries); - return stack_depot_save(entries, nr_entries, flags); + return __stack_depot_save(entries, nr_entries, flags, can_alloc); } void kasan_set_track(struct kasan_track *track, gfp_t flags) { track->pid = current->pid; - track->stack = kasan_save_stack(flags); + track->stack = kasan_save_stack(flags, true); } #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c index c3f5ba7a294a..2a8e59e6326d 100644 --- a/mm/kasan/generic.c +++ b/mm/kasan/generic.c @@ -345,7 +345,7 @@ void kasan_record_aux_stack(void *addr) return; alloc_meta->aux_stack[1] = alloc_meta->aux_stack[0]; - alloc_meta->aux_stack[0] = kasan_save_stack(GFP_NOWAIT); + alloc_meta->aux_stack[0] = kasan_save_stack(GFP_NOWAIT, true); } void kasan_set_free_info(struct kmem_cache *cache, diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index fa02c88b6948..e442d94a8f6e 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -260,7 +260,7 @@ void kasan_report_invalid_free(void *object, unsigned long ip); struct page *kasan_addr_to_page(const void *addr); -depot_stack_handle_t kasan_save_stack(gfp_t flags); +depot_stack_handle_t kasan_save_stack(gfp_t flags, bool can_alloc); void kasan_set_track(struct kasan_track *track, gfp_t flags); void kasan_set_free_info(struct kmem_cache *cache, void *object, u8 tag); struct kasan_track *kasan_get_free_track(struct kmem_cache *cache, -- 2.33.0.153.gba50c8fa24-goog