From 2acf5a3e6e9371e63c9e4ff54d84d08f630467a0 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Thu, 27 Jun 2019 17:43:08 +0100
Subject: [PATCH 2/7] ALSA: usb-audio: fix sign unintended sign extension on left shifts
Git-commit: 2acf5a3e6e9371e63c9e4ff54d84d08f630467a0
Patch-mainline: v5.2
References: bsc#1051510
There are a couple of left shifts of unsigned 8 bit values that
first get promoted to signed ints and hence get sign extended
on the shift if the top bit of the 8 bit values are set. Fix
this by casting the 8 bit values to unsigned ints to stop the
unintentional sign extension.
Addresses-coverity: ("Unintended sign extension")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/usb/mixer_quirks.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index a751a18ca4c2..5783329a3237 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -754,7 +754,7 @@ static int snd_ni_control_init_val(struct usb_mixer_interface *mixer,
return err;
}
- kctl->private_value |= (value << 24);
+ kctl->private_value |= ((unsigned int)value << 24);
return 0;
}
@@ -915,7 +915,7 @@ static int snd_ftu_eff_switch_init(struct usb_mixer_interface *mixer,
if (err < 0)
return err;
- kctl->private_value |= value[0] << 24;
+ kctl->private_value |= (unsigned int)value[0] << 24;
return 0;
}
--
2.16.4