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[5.10,336/717] staging: greybus: audio: Fix possible leak free widgets in gbaudio_dapm_free_controls

Message ID 20201228125037.119719747@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Dec. 28, 2020, 12:45 p.m. UTC 
From: Wang Hai <wanghai38@huawei.com>

[ Upstream commit e77b259f67ab99f1e22ce895b9b1c637fd5f2d4c ]

In gbaudio_dapm_free_controls(), if one of the widgets is not found, an error
will be returned directly, which will cause the rest to be unable to be freed,
resulting in leak.

This patch fixes the bug. If if one of them is not found, just skip and free the others.

Fixes: 510e340efe0c ("staging: greybus: audio: Add helper APIs for dynamic audio module")
Reported-by: Hulk Robot <hulkci@huawei.com>
Reviewed-by: Vaibhav Agarwal <vaibhav.sr@gmail.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Link: https://lore.kernel.org/r/20201205103827.31244-1-wanghai38@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/staging/greybus/audio_helper.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/staging/greybus/audio_helper.c b/drivers/staging/greybus/audio_helper.c
index 237531ba60f30..3011b8abce389 100644
--- a/drivers/staging/greybus/audio_helper.c
+++ b/drivers/staging/greybus/audio_helper.c
@@ -135,7 +135,8 @@  int gbaudio_dapm_free_controls(struct snd_soc_dapm_context *dapm,
 		if (!w) {
 			dev_err(dapm->dev, "%s: widget not found\n",
 				widget->name);
-			return -EINVAL;
+			widget++;
+			continue;
 		}
 		widget++;
 #ifdef CONFIG_DEBUG_FS