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authorTakashi Iwai <tiwai@suse.de>2018-03-08 08:26:48 +0100
committerTakashi Iwai <tiwai@suse.de>2018-03-08 08:41:12 +0100
commit2e2c177ca84aff092c3c96714b0f6a12900f3946 (patch)
tree8f0f0e6d1f51b3541fcf71f207b1496dd411fddc /sound/core
parent338e17d3f58e9868a12af7deb1edcfb40bd588b2 (diff)
downloadlinux-2e2c177ca84aff092c3c96714b0f6a12900f3946.tar.bz2
ALSA: vmaster: Propagate slave error
In slave_update() of vmaster code ignores the error from the slave get() callback and copies the values. It's not only about the missing error code but also that this may potentially lead to a leak of uninitialized variables when the slave get() don't clear them. This patch fixes slave_update() not to copy the potentially uninitialized values when an error is returned from the slave get() callback, and to propagate the error value properly. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/vmaster.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/sound/core/vmaster.c b/sound/core/vmaster.c
index 8632301489fa..b67de2bb06a2 100644
--- a/sound/core/vmaster.c
+++ b/sound/core/vmaster.c
@@ -68,10 +68,13 @@ static int slave_update(struct link_slave *slave)
return -ENOMEM;
uctl->id = slave->slave.id;
err = slave->slave.get(&slave->slave, uctl);
+ if (err < 0)
+ goto error;
for (ch = 0; ch < slave->info.count; ch++)
slave->vals[ch] = uctl->value.integer.value[ch];
+ error:
kfree(uctl);
- return 0;
+ return err < 0 ? err : 0;
}
/* get the slave ctl info and save the initial values */