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 siw_pbl. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Bernard Metzler <b...@zurich.ibm.com> Cc: Jason Gunthorpe <j...@ziepe.ca> Cc: Leon Romanovsky <l...@kernel.org> Cc: linux-r...@vger.kernel.org Signed-off-by: Kees Cook <keesc...@chromium.org> --- drivers/infiniband/sw/siw/siw.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/sw/siw/siw.h b/drivers/infiniband/sw/siw/siw.h index 1c78c1ca7d7a..cec5cccd2e75 100644 --- a/drivers/infiniband/sw/siw/siw.h +++ b/drivers/infiniband/sw/siw/siw.h @@ -137,7 +137,7 @@ struct siw_pble { struct siw_pbl { unsigned int num_buf; unsigned int max_buf; - struct siw_pble pbe[]; + struct siw_pble pbe[] __counted_by(max_buf); }; /* -- 2.34.1
