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ALSA: hda: Annotate struct hda_conn_list with __counted_by

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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 <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: Cezary Rojewski <cezary.rojewski@intel.com>
Cc: alsa-devel@alsa-project.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230922175042.work.547-kees@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Kees Cook 2023-09-22 10:50:42 -07:00 • committed by Takashi Iwai
parent 4c870513fb
commit 81420faff0
1 changed files with 1 additions and 1 deletions
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2
sound/pci/hda/hda_codec.c
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@ -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 */