From: Kees Cook Date: Fri, 29 Sep 2023 18:04:29 +0000 (-0700) Subject: IB/mthca: Annotate struct mthca_icm_table with __counted_by X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2aba54a9e0ead531f7fd35f312239788a435a4f5;p=linux.git IB/mthca: Annotate struct mthca_icm_table 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 mthca_icm_table. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Jason Gunthorpe Cc: Leon Romanovsky Cc: linux-rdma@vger.kernel.org Signed-off-by: Kees Cook Link: https://lore.kernel.org/r/20230929180431.3005464-6-keescook@chromium.org Signed-off-by: Leon Romanovsky --- diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.h b/drivers/infiniband/hw/mthca/mthca_memfree.h index f9a2e65e2ff59..61d5bbba293a8 100644 --- a/drivers/infiniband/hw/mthca/mthca_memfree.h +++ b/drivers/infiniband/hw/mthca/mthca_memfree.h @@ -68,7 +68,7 @@ struct mthca_icm_table { int lowmem; int coherent; struct mutex mutex; - struct mthca_icm *icm[]; + struct mthca_icm *icm[] __counted_by(num_icm); }; struct mthca_icm_iter {