lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Tue, 21 Aug 2018 08:21:26 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Takashi Iwai <tiwai@...e.de>
Subject: [PATCH 4.9 12/25] ALSA: cs5535audio: Fix invalid endian conversion

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Iwai <tiwai@...e.de>

commit 69756930f2de0457d51db7d505a1e4f40e9fd116 upstream.

One place in cs5535audio_build_dma_packets() does an extra conversion
via cpu_to_le32(); namely jmpprd_addr is passed to setup_prd() ops,
which writes the value via cs_writel().  That is, the callback does
the conversion by itself, and we don't need to convert beforehand.

This patch fixes that bogus conversion.

Cc: <stable@...r.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/pci/cs5535audio/cs5535audio.h     |    6 +++---
 sound/pci/cs5535audio/cs5535audio_pcm.c |    4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

--- a/sound/pci/cs5535audio/cs5535audio.h
+++ b/sound/pci/cs5535audio/cs5535audio.h
@@ -66,9 +66,9 @@ struct cs5535audio_dma_ops {
 };
 
 struct cs5535audio_dma_desc {
-	u32 addr;
-	u16 size;
-	u16 ctlreserved;
+	__le32 addr;
+	__le16 size;
+	__le16 ctlreserved;
 };
 
 struct cs5535audio_dma {
--- a/sound/pci/cs5535audio/cs5535audio_pcm.c
+++ b/sound/pci/cs5535audio/cs5535audio_pcm.c
@@ -158,8 +158,8 @@ static int cs5535audio_build_dma_packets
 	lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);
 	lastdesc->size = 0;
 	lastdesc->ctlreserved = cpu_to_le16(PRD_JMP);
-	jmpprd_addr = cpu_to_le32(lastdesc->addr +
-				  (sizeof(struct cs5535audio_dma_desc)*periods));
+	jmpprd_addr = (u32)dma->desc_buf.addr +
+		sizeof(struct cs5535audio_dma_desc) * periods;
 
 	dma->substream = substream;
 	dma->period_bytes = period_bytes;


Powered by blists - more mailing lists