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Patch "ALSA: au88x0: Fix zero clear of stream->resources" has been added to the 4.4-stable tree

PATCH [email protected] 1 participant 1 message Aug 30, 2017

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This is a note to let you know that I've just added the patch titled

    ALSA: au88x0: Fix zero clear of stream->resources

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
alsa-au88x0-fix-zero-clear-of-stream-resources.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From 639db596165746ca87bbcb56559b094fd9042890 Mon Sep 17 00:00:00 2001

From: Takashi Iwai <[email protected]>
Date: Thu, 12 May 2016 18:04:16 +0200
Subject: ALSA: au88x0: Fix zero clear of stream->resources

From: Takashi Iwai <[email protected]>

commit 639db596165746ca87bbcb56559b094fd9042890 upstream.

There are a few calls of memset() to stream->resources, but they all are called in a wrong size, sizeof(unsigned char) * VORTEX_RESOURCE_LAST, while this field is a u32 array. This may leave the memories not zero-cleared.

Fix it by replacing them with a simpler sizeof(stream->resources) instead.

Reported-by David Binderman <[email protected]>
Signed-off-by Takashi Iwai <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 sound/pci/au88x0/au88x0_core.c |   14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)
sound/pci/au88x0/au88x0_core.c +5 -9
@@ -2150,8 +2150,7 @@ vortex_adb_allocroute(vortex_t *vortex,
 							   stream->resources, en,
 							   VORTEX_RESOURCE_SRC)) < 0) {
 					memset(stream->resources, 0,
-					       sizeof(unsigned char) *
-					       VORTEX_RESOURCE_LAST);
+					       sizeof(stream->resources));
 					return -EBUSY;
 				}
 				if (stream->type != VORTEX_PCM_A3D) {

@@ -2161,7 +2160,7 @@ vortex_adb_allocroute(vortex_t *vortex,
 								   VORTEX_RESOURCE_MIXIN)) < 0) {
 						memset(stream->resources,
 						       0,
-						       sizeof(unsigned char) * VORTEX_RESOURCE_LAST);
+						       sizeof(stream->resources));
 						return -EBUSY;
 					}
 				}

@@ -2174,8 +2173,7 @@ vortex_adb_allocroute(vortex_t *vortex,
 						   stream->resources, en,
 						   VORTEX_RESOURCE_A3D)) < 0) {
 				memset(stream->resources, 0,
-				       sizeof(unsigned char) *
-				       VORTEX_RESOURCE_LAST);
+				       sizeof(stream->resources));
 				dev_err(vortex->card->dev,
 					"out of A3D sources. Sorry\n");
 				return -EBUSY;

@@ -2289,8 +2287,7 @@ vortex_adb_allocroute(vortex_t *vortex,
 						   VORTEX_RESOURCE_MIXOUT))
 			    < 0) {
 				memset(stream->resources, 0,
-				       sizeof(unsigned char) *
-				       VORTEX_RESOURCE_LAST);
+				       sizeof(stream->resources));
 				return -EBUSY;
 			}
 			if ((src[i] =

@@ -2298,8 +2295,7 @@ vortex_adb_allocroute(vortex_t *vortex,
 						   stream->resources, en,
 						   VORTEX_RESOURCE_SRC)) < 0) {
 				memset(stream->resources, 0,
-				       sizeof(unsigned char) *
-				       VORTEX_RESOURCE_LAST);
+				       sizeof(stream->resources));
 				return -EBUSY;
 			}
 		}

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/alsa-au88x0-fix-zero-clear-of-stream-resources.patch