From 5234193ee2b997e59326b047610a8f3f64a0ce02 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 15 Sep 2023 13:15:17 -0700 Subject: [PATCH] ceph: Annotate struct ceph_osd_request 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 ceph_osd_request. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Ilya Dryomov Cc: Xiubo Li Cc: Jeff Layton Cc: ceph-devel@vger.kernel.org Reviewed-by: "Gustavo A. R. Silva" Reviewed-by: Xiubo Li Link: https://lore.kernel.org/r/20230915201517.never.373-kees@kernel.org Signed-off-by: Kees Cook --- include/linux/ceph/osd_client.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h index bf9823956758..b8610e9d2471 100644 --- a/include/linux/ceph/osd_client.h +++ b/include/linux/ceph/osd_client.h @@ -278,7 +278,7 @@ struct ceph_osd_request { int r_attempts; u32 r_map_dne_bound; - struct ceph_osd_req_op r_ops[]; + struct ceph_osd_req_op r_ops[] __counted_by(r_num_ops); }; struct ceph_request_redirect {