diff options
| author | Kees Cook <keescook@chromium.org> | 2023-10-03 16:28:53 -0700 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-10-04 12:56:21 +0100 |
| commit | 80e698e2df5ba2124bdeca37f1e589de58a4d514 (patch) | |
| tree | 82bba1b0ac75d1281a0c7a0d60d511e8630e733c /include/sound | |
| parent | 943bcc742ec4d7da4d26477f2188940ecad76569 (diff) | |
ASoC: soc-dapm: Annotate struct snd_soc_dapm_widget_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 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 snd_soc_dapm_widget_list.
Additionally, since the element count member must be set before accessing
the annotated flexible array member, move its initialization earlier.
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: alsa-devel@alsa-project.org
Cc: linux-hardening@vger.kernel.org
Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1]
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20231003232852.work.257-kees@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/sound')
| -rw-r--r-- | include/sound/soc-dapm.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h index d2faec9a323e..51516c93916e 100644 --- a/include/sound/soc-dapm.h +++ b/include/sound/soc-dapm.h @@ -717,7 +717,7 @@ struct snd_soc_dapm_context { /* A list of widgets associated with an object, typically a snd_kcontrol */ struct snd_soc_dapm_widget_list { int num_widgets; - struct snd_soc_dapm_widget *widgets[]; + struct snd_soc_dapm_widget *widgets[] __counted_by(num_widgets); }; #define for_each_dapm_widgets(list, i, widget) \ |