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From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
To: tiwai@suse.de
Cc: clemens@ladisch.de, alsa-devel@alsa-project.org, stable@vger.kernel.org
Subject: [PATCH 3/5] ALSA: firewire-lib: fix check for the size of isochronous packet payload
Date: Thu, 13 May 2021 21:56:50 +0900	[thread overview]
Message-ID: <20210513125652.110249-4-o-takashi@sakamocchi.jp> (raw)
In-Reply-To: <20210513125652.110249-1-o-takashi@sakamocchi.jp>

The check for size of isochronous packet payload just cares of the size of
IR context payload without the size of CIP header.

Cc: <stable@vger.kernel.org>
Fixes: f11453c7cc01 ("ALSA: firewire-lib: use 16 bytes IR context header to separate CIP header")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
---
 sound/firewire/amdtp-stream.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index 4e2f2bb7879f..b53971bf4b90 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -633,18 +633,24 @@ static int parse_ir_ctx_header(struct amdtp_stream *s, unsigned int cycle,
 			       unsigned int *syt, unsigned int index)
 {
 	const __be32 *cip_header;
+	unsigned int cip_header_size;
 	int err;
 
 	*payload_length = be32_to_cpu(ctx_header[0]) >> ISO_DATA_LENGTH_SHIFT;
-	if (*payload_length > s->ctx_data.tx.ctx_header_size +
-					s->ctx_data.tx.max_ctx_payload_length) {
+
+	if (!(s->flags & CIP_NO_HEADER))
+		cip_header_size = 8;
+	else
+		cip_header_size = 0;
+
+	if (*payload_length > cip_header_size + s->ctx_data.tx.max_ctx_payload_length) {
 		dev_err(&s->unit->device,
 			"Detect jumbo payload: %04x %04x\n",
-			*payload_length, s->ctx_data.tx.max_ctx_payload_length);
+			*payload_length, cip_header_size + s->ctx_data.tx.max_ctx_payload_length);
 		return -EIO;
 	}
 
-	if (!(s->flags & CIP_NO_HEADER)) {
+	if (cip_header_size > 0) {
 		cip_header = ctx_header + 2;
 		err = check_cip_header(s, cip_header, *payload_length,
 				       data_blocks, data_block_counter, syt);
-- 
2.27.0


WARNING: multiple messages have this Message-ID (diff)
From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
To: tiwai@suse.de
Cc: alsa-devel@alsa-project.org, clemens@ladisch.de, stable@vger.kernel.org
Subject: [PATCH 3/5] ALSA: firewire-lib: fix check for the size of isochronous packet payload
Date: Thu, 13 May 2021 21:56:50 +0900	[thread overview]
Message-ID: <20210513125652.110249-4-o-takashi@sakamocchi.jp> (raw)
In-Reply-To: <20210513125652.110249-1-o-takashi@sakamocchi.jp>

The check for size of isochronous packet payload just cares of the size of
IR context payload without the size of CIP header.

Cc: <stable@vger.kernel.org>
Fixes: f11453c7cc01 ("ALSA: firewire-lib: use 16 bytes IR context header to separate CIP header")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
---
 sound/firewire/amdtp-stream.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index 4e2f2bb7879f..b53971bf4b90 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -633,18 +633,24 @@ static int parse_ir_ctx_header(struct amdtp_stream *s, unsigned int cycle,
 			       unsigned int *syt, unsigned int index)
 {
 	const __be32 *cip_header;
+	unsigned int cip_header_size;
 	int err;
 
 	*payload_length = be32_to_cpu(ctx_header[0]) >> ISO_DATA_LENGTH_SHIFT;
-	if (*payload_length > s->ctx_data.tx.ctx_header_size +
-					s->ctx_data.tx.max_ctx_payload_length) {
+
+	if (!(s->flags & CIP_NO_HEADER))
+		cip_header_size = 8;
+	else
+		cip_header_size = 0;
+
+	if (*payload_length > cip_header_size + s->ctx_data.tx.max_ctx_payload_length) {
 		dev_err(&s->unit->device,
 			"Detect jumbo payload: %04x %04x\n",
-			*payload_length, s->ctx_data.tx.max_ctx_payload_length);
+			*payload_length, cip_header_size + s->ctx_data.tx.max_ctx_payload_length);
 		return -EIO;
 	}
 
-	if (!(s->flags & CIP_NO_HEADER)) {
+	if (cip_header_size > 0) {
 		cip_header = ctx_header + 2;
 		err = check_cip_header(s, cip_header, *payload_length,
 				       data_blocks, data_block_counter, syt);
-- 
2.27.0


  parent reply	other threads:[~2021-05-13 12:57 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-13 12:56 [PATCH 0/5] ALSA: firewire: misc fixes Takashi Sakamoto
2021-05-13 12:56 ` [PATCH 1/5] ALSA: dice: fix stream format at middle sampling rate for Alesis iO 26 Takashi Sakamoto
2021-05-13 12:56   ` Takashi Sakamoto
2021-05-13 12:56 ` [PATCH 2/5] ALSA: bebob/oxfw: fix Kconfig entry for Mackie d.2 Pro Takashi Sakamoto
2021-05-13 12:56   ` Takashi Sakamoto
2021-05-13 12:56 ` Takashi Sakamoto [this message]
2021-05-13 12:56   ` [PATCH 3/5] ALSA: firewire-lib: fix check for the size of isochronous packet payload Takashi Sakamoto
2021-05-13 12:56 ` [PATCH 4/5] ALSA: firewire-lib: fix calculation for size of IR context payload Takashi Sakamoto
2021-05-13 12:56   ` Takashi Sakamoto
2021-05-13 12:56 ` [PATCH 5/5] ALSA: firewire-lib: fix amdtp_packet tracepoints event for packet_index field Takashi Sakamoto
2021-05-13 12:56   ` Takashi Sakamoto
2021-05-14  7:42 ` [PATCH 0/5] ALSA: firewire: misc fixes Takashi Iwai

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