Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH] interconnect: Annotate struct icc_path with __counted_by | Date | Thu, 17 Aug 2023 13:41:47 -0700 |
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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 icc_path.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Georgi Djakov <djakov@kernel.org> Cc: linux-pm@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/interconnect/internal.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/interconnect/internal.h b/drivers/interconnect/internal.h index f5f82a5c939e..b30856db523d 100644 --- a/drivers/interconnect/internal.h +++ b/drivers/interconnect/internal.h @@ -38,7 +38,7 @@ struct icc_req { struct icc_path { const char *name; size_t num_nodes; - struct icc_req reqs[]; + struct icc_req reqs[] __counted_by(num_nodes); }; #endif -- 2.34.1
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