From a8b163e184dede158c94f6392a406ac40a08fb1b Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 22 Sep 2023 10:50:23 -0700 Subject: i3c: svc: Annotate struct svc_i3c_xfer 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 svc_i3c_xfer. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Miquel Raynal Cc: Conor Culhane Cc: Alexandre Belloni Cc: linux-i3c@lists.infradead.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Reviewed-by: Miquel Raynal Link: https://lore.kernel.org/r/20230922175023.work.239-kees@kernel.org Signed-off-by: Alexandre Belloni --- drivers/i3c/master/svc-i3c-master.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/i3c') diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c index 8f8295acdadb..32eca2d6caf0 100644 --- a/drivers/i3c/master/svc-i3c-master.c +++ b/drivers/i3c/master/svc-i3c-master.c @@ -143,7 +143,7 @@ struct svc_i3c_xfer { int ret; unsigned int type; unsigned int ncmds; - struct svc_i3c_cmd cmds[]; + struct svc_i3c_cmd cmds[] __counted_by(ncmds); }; struct svc_i3c_regs_save { -- cgit v1.2.3