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authorMarco Elver <elver@google.com>2021-11-05 23:35:46 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-11-06 23:30:33 +0300
commit7cb3007ce2da27ec02a1a3211941e7fe6875b642 (patch)
tree56355cd0169ba7c977c4e1114fd6dfef0ae06268 /include/linux/kasan.h
parent7594b34774294ff23a32506b8b874d6425a1481a (diff)
downloadlinux-7cb3007ce2da27ec02a1a3211941e7fe6875b642.tar.xz
kasan: generic: introduce kasan_record_aux_stack_noalloc()
Introduce a variant of kasan_record_aux_stack() that does not do any memory allocation through stackdepot. This will permit using it in contexts that cannot allocate any memory. Link: https://lkml.kernel.org/r/20210913112609.2651084-6-elver@google.com Signed-off-by: Marco Elver <elver@google.com> Tested-by: Shuah Khan <skhan@linuxfoundation.org> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Taras Madan <tarasmadan@google.com> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vijayanand Jitta <vjitta@codeaurora.org> Cc: Vinayak Menon <vinmenon@codeaurora.org> Cc: Walter Wu <walter-zh.wu@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/kasan.h')
-rw-r--r--include/linux/kasan.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index dd874a1ee862..736d7b458996 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h
@@ -370,12 +370,14 @@ static inline void kasan_unpoison_task_stack(struct task_struct *task) {}
void kasan_cache_shrink(struct kmem_cache *cache);
void kasan_cache_shutdown(struct kmem_cache *cache);
void kasan_record_aux_stack(void *ptr);
+void kasan_record_aux_stack_noalloc(void *ptr);
#else /* CONFIG_KASAN_GENERIC */
static inline void kasan_cache_shrink(struct kmem_cache *cache) {}
static inline void kasan_cache_shutdown(struct kmem_cache *cache) {}
static inline void kasan_record_aux_stack(void *ptr) {}
+static inline void kasan_record_aux_stack_noalloc(void *ptr) {}
#endif /* CONFIG_KASAN_GENERIC */