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authorDaniil Dementev <d.dementev@ispras.ru>2022-06-10 18:57:32 +0200
committerTakashi Iwai <tiwai@suse.de>2022-06-13 07:40:08 +0200
commit3ddbe35d9a2ebd4924d458e0246b4ba6c13bb456 (patch)
treeda607f141fcd72640a7dbaf19ec6345f7599a13a /sound/usb
parentALSA: hda/realtek: Add mute LED quirk for HP Omen laptop (diff)
downloadlinux-3ddbe35d9a2ebd4924d458e0246b4ba6c13bb456.tar.xz
linux-3ddbe35d9a2ebd4924d458e0246b4ba6c13bb456.zip
ALSA: usb-audio: US16x08: Move overflow check before array access
Buffer overflow could occur in the loop "while", due to accessing an array element before checking the index. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Daniil Dementev <d.dementev@ispras.ru> Reviewed-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Link: https://lore.kernel.org/r/20220610165732.2904-1-d.dementev@ispras.ru Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/mixer_us16x08.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/sound/usb/mixer_us16x08.c b/sound/usb/mixer_us16x08.c
index b7b6f3834ed5..6eb7d93b358d 100644
--- a/sound/usb/mixer_us16x08.c
+++ b/sound/usb/mixer_us16x08.c
@@ -637,10 +637,10 @@ static int snd_get_meter_comp_index(struct snd_us16x08_meter_store *store)
}
} else {
/* skip channels with no compressor active */
- while (!store->comp_store->val[
+ while (store->comp_index <= SND_US16X08_MAX_CHANNELS
+ && !store->comp_store->val[
COMP_STORE_IDX(SND_US16X08_ID_COMP_SWITCH)]
- [store->comp_index - 1]
- && store->comp_index <= SND_US16X08_MAX_CHANNELS) {
+ [store->comp_index - 1]) {
store->comp_index++;
}
ret = store->comp_index++;