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authorKees Cook <keescook@chromium.org>2023-09-30 09:20:20 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2023-09-30 09:24:17 -0700
commit348cbf987ed328682af7d74ce98d9f0e6857f42f (patch)
tree59aed4e56096ef568537e15695cefc6604e3759a
parent21d7ec79ef5b1c23495dd88e5679c1a1d6dd17ae (diff)
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Input: mt - annotate struct input_mt with __counted_by
Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct input_mt. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20230922175036.work.762-kees@kernel.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
-rw-r--r--include/linux/input/mt.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/input/mt.h b/include/linux/input/mt.h
index 3b8580bd33c1..2cf89a538b18 100644
--- a/include/linux/input/mt.h
+++ b/include/linux/input/mt.h
@@ -47,7 +47,7 @@ struct input_mt {
unsigned int flags;
unsigned int frame;
int *red;
- struct input_mt_slot slots[];
+ struct input_mt_slot slots[] __counted_by(num_slots);
};
static inline void input_mt_set_value(struct input_mt_slot *slot,