From: Kees Cook Date: Fri, 22 Sep 2023 17:50:42 +0000 (-0700) Subject: ALSA: hda: Annotate struct hda_conn_list with __counted_by X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=81420faff0eb8603c6d5e5267455bddf70f20a95;p=linux.git ALSA: hda: Annotate struct hda_conn_list 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 hda_conn_list. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Jaroslav Kysela Cc: Takashi Iwai Cc: Cezary Rojewski Cc: alsa-devel@alsa-project.org Signed-off-by: Kees Cook Link: https://lore.kernel.org/r/20230922175042.work.547-kees@kernel.org Signed-off-by: Takashi Iwai --- diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 33af707a65ab1..01718b1fc9a7f 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -88,7 +88,7 @@ struct hda_conn_list { struct list_head list; int len; hda_nid_t nid; - hda_nid_t conns[]; + hda_nid_t conns[] __counted_by(len); }; /* look up the cached results */