[PATCH v11 1/3] interconnect: mediatek: fix Makefile typo for mt8196

[PATCH v11 1/3] interconnect: mediatek: fix Makefile typo for mt8196

[Breno Rodrigues Alves]

Correct a copy-paste typo in the MediaTek interconnect Makefile that
mapped mt8196.o to CONFIG_INTERCONNECT_MTK_MT8195 instead of MT8196.

Assisted-by: OpenCode AI
Signed-off-by: Breno Rodrigues Alves <breno3011alves@gmail.com>
---
 drivers/interconnect/mediatek/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/interconnect/mediatek/Makefile b/drivers/interconnect/mediatek/Makefile
index 6bd656668..64170ab16 100644
--- a/drivers/interconnect/mediatek/Makefile
+++ b/drivers/interconnect/mediatek/Makefile
@@ -3,4 +3,4 @@
 obj-$(CONFIG_INTERCONNECT_MTK_DVFSRC_EMI) += icc-emi.o
 obj-$(CONFIG_INTERCONNECT_MTK_MT8183) += mt8183.o
 obj-$(CONFIG_INTERCONNECT_MTK_MT8195) += mt8195.o
-obj-$(CONFIG_INTERCONNECT_MTK_MT8195) += mt8196.o
+obj-$(CONFIG_INTERCONNECT_MTK_MT8196) += mt8196.o
-- 
2.43.0

[PATCH v11 2/3] regulator: mtk-spmi: fix Makefile typo for mt6316

[Breno Rodrigues Alves]

Fix a Makefile typo that incorrectly placed the mt6316-regulator object
under the old CONFIG_REGULATOR_MT6315 configuration flag.

Assisted-by: OpenCode AI
Signed-off-by: Breno Rodrigues Alves <breno3011alves@gmail.com>
---
 drivers/regulator/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 5a764cec8..3a0db1be6 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -107,7 +107,7 @@ obj-$(CONFIG_REGULATOR_MP886X) += mp886x.o
 obj-$(CONFIG_REGULATOR_MPQ7920) += mpq7920.o
 obj-$(CONFIG_REGULATOR_MT6311) += mt6311-regulator.o
 obj-$(CONFIG_REGULATOR_MT6315) += mt6315-regulator.o
-obj-$(CONFIG_REGULATOR_MT6315)  += mt6316-regulator.o
+obj-$(CONFIG_REGULATOR_MT6316) += mt6316-regulator.o
 obj-$(CONFIG_REGULATOR_MT6323)	+= mt6323-regulator.o
 obj-$(CONFIG_REGULATOR_MT6331)	+= mt6331-regulator.o
 obj-$(CONFIG_REGULATOR_MT6332)	+= mt6332-regulator.o
-- 
2.43.0

Re: [PATCH v11 2/3] regulator: mtk-spmi: fix Makefile typo for mt6316

[sashiko-bot]

> Fix a Makefile typo that incorrectly placed the mt6316-regulator object
> under the old CONFIG_REGULATOR_MT6315 configuration flag.
> 
> Assisted-by: OpenCode AI
> Signed-off-by: Breno Rodrigues Alves <breno3011alves@gmail.com>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260905140113.21638-1-breno3011alves@gmail.com?part=2

[PATCH v11 3/3] media: dvb-core: extirpate defective and unsafe ULE debug block

[Breno Rodrigues Alves]

Completely purge the unmaintained DVB_ULE_DEBUG code block from
dvb_net.c and its Kconfig definition to eliminate severe lockless race
conditions and clean up the unused function signature parameter.

Assisted-by: OpenCode AI
Signed-off-by: Breno Rodrigues Alves <breno3011alves@gmail.com>
---
 drivers/media/dvb-core/Kconfig   | 11 ---------
 drivers/media/dvb-core/dvb_net.c | 42 +-------------------------------
 2 files changed, 1 insertion(+), 52 deletions(-)

diff --git a/drivers/media/dvb-core/Kconfig b/drivers/media/dvb-core/Kconfig
index 8b3f2d53c..c6a97add8 100644
--- a/drivers/media/dvb-core/Kconfig
+++ b/drivers/media/dvb-core/Kconfig
@@ -67,14 +67,3 @@ config DVB_DEMUX_SECTION_LOSS_LOG
 
 	  If you are unsure about this, say N here.
 
-config DVB_ULE_DEBUG
-	bool "Enable DVB net ULE packet debug messages"
-	depends on DVB_CORE
-	help
-	  Enable extra log messages meant to detect problems while
-	  handling DVB network ULE packet loss inside the Kernel.
-
-	  Should not be enabled on normal cases, as logs can
-	  be very verbose.
-
-	  If you are unsure about this, say N here.
diff --git a/drivers/media/dvb-core/dvb_net.c b/drivers/media/dvb-core/dvb_net.c
index a2159b2bc..5060b8866 100644
--- a/drivers/media/dvb-core/dvb_net.c
+++ b/drivers/media/dvb-core/dvb_net.c
@@ -68,19 +68,6 @@ static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt )
 
 #define DVB_NET_MULTICAST_MAX 10
 
-#ifdef DVB_ULE_DEBUG
-/*
- * The code inside DVB_ULE_DEBUG keeps a history of the
- * last 100 TS cells processed.
- */
-static unsigned char ule_hist[100*TS_SZ] = { 0 };
-static unsigned char *ule_where = ule_hist, ule_dump;
-
-static void hexdump(const unsigned char *buf, unsigned short len)
-{
-	print_hex_dump_debug("", DUMP_PREFIX_OFFSET, 16, 1, buf, len, true);
-}
-#endif
 
 struct dvb_net_priv {
 	int in_use;
@@ -320,16 +307,6 @@ static int dvb_net_ule_new_ts_cell(struct dvb_net_ule_handle *h)
 {
 	/* We are about to process a new TS cell. */
 
-#ifdef DVB_ULE_DEBUG
-	if (ule_where >= &ule_hist[100*TS_SZ])
-		ule_where = ule_hist;
-	memcpy(ule_where, h->ts, TS_SZ);
-	if (ule_dump) {
-		hexdump(ule_where, TS_SZ);
-		ule_dump = 0;
-	}
-	ule_where += TS_SZ;
-#endif
 
 	/*
 	 * Check TS h->error conditions: sync_byte, transport_error_indicator,
@@ -659,23 +636,6 @@ static void dvb_net_ule_check_crc(struct dvb_net_ule_handle *h,
 			h->ts_remain > 2 ?
 				*(unsigned short *)h->from_where : 0);
 
-	#ifdef DVB_ULE_DEBUG
-		hexdump(iov[0].iov_base, iov[0].iov_len);
-		hexdump(iov[1].iov_base, iov[1].iov_len);
-		hexdump(iov[2].iov_base, iov[2].iov_len);
-
-		if (ule_where == ule_hist) {
-			hexdump(&ule_hist[98*TS_SZ], TS_SZ);
-			hexdump(&ule_hist[99*TS_SZ], TS_SZ);
-		} else if (ule_where == &ule_hist[TS_SZ]) {
-			hexdump(&ule_hist[99*TS_SZ], TS_SZ);
-			hexdump(ule_hist, TS_SZ);
-		} else {
-			hexdump(ule_where - TS_SZ - TS_SZ, TS_SZ);
-			hexdump(ule_where - TS_SZ, TS_SZ);
-		}
-		ule_dump = 1;
-	#endif
 
 		h->dev->stats.rx_errors++;
 		h->dev->stats.rx_crc_errors++;
@@ -843,7 +803,7 @@ static void dvb_net_ule(struct net_device *dev, const u8 *buf, size_t buf_len)
 				       *(tail - 2) << 8 |
 				       *(tail - 1);
 
-			dvb_net_ule_check_crc(&h, iov, ule_crc, expected_crc);
+			dvb_net_ule_check_crc(&h, ule_crc, expected_crc);
 
 			/* Prepare for next SNDU. */
 			reset_ule(h.priv);
-- 
2.43.0

Re: [PATCH v11 3/3] media: dvb-core: extirpate defective and unsafe ULE debug block

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 3 potential issue(s) to consider:

New issues:
- [Low] The patch introduces a severe compilation failure by modifying the call to `dvb_net_ule_check_crc()` to pass 3 arguments instead of 4, without updating the function's signature to match.

Pre-existing issues:
- [Critical] The network device is unregistered after flushing the workqueues, allowing callbacks to queue works during unregistration, which leads to a Use-After-Free.
- [Critical] Missing bounds checks when parsing ULE extension headers allows malformed packets to cause out-of-bounds memory reads.
--

commit e9caeb2ec9c58e63757d73d1d8a17bcadf35a678
Author: Breno Rodrigues Alves <breno3011alves@gmail.com>

media: dvb-core: extirpate defective and unsafe ULE debug block

This commit removes the unmaintained DVB_ULE_DEBUG code block from
dvb_net.c and its Kconfig definition. It aims to eliminate race
conditions and clean up unused function signature parameters.

> diff --git a/drivers/media/dvb-core/dvb_net.c b/drivers/media/dvb-core/dvb_net.c
> index a2159b2bc1766..5060b8866de8a 100644
> --- a/drivers/media/dvb-core/dvb_net.c
> +++ b/drivers/media/dvb-core/dvb_net.c

[ ... ]

> @@ -843,7 +803,7 @@ static void dvb_net_ule(struct net_device *dev, const u8 *buf, size_t buf_len)
>  				       *(tail - 2) << 8 |
>  				       *(tail - 1);
>  
> -			dvb_net_ule_check_crc(&h, iov, ule_crc, expected_crc);
> +			dvb_net_ule_check_crc(&h, ule_crc, expected_crc);

[Severity: Low]
Does this change miss updating the function signature of
dvb_net_ule_check_crc()? 

It looks like the invocation now passes 3 arguments, but the function
definition for dvb_net_ule_check_crc() still expects the iov array as its
second argument, which causes a compilation failure due to too few arguments.

>  
>  			/* Prepare for next SNDU. */
>  			reset_ule(h.priv);


While reviewing this code, I also noticed a couple of issues that are not
introduced by this patch, but might be worth addressing:

[Severity: Critical]
This is a pre-existing issue, but I noticed a potential use-after-free
when unregistering the network device.

In dvb_net_remove_if(), the workqueues are flushed before the device is
unregistered:

	flush_work(&priv->set_multicast_list_wq);
	flush_work(&priv->restart_net_feed_wq);
	pr_info("removed network interface %s\n", net->name);
	unregister_netdev(net);

When unregister_netdev() is called, callbacks can be triggered (such as
ndo_set_rx_mode mapping to dvb_net_set_multicast_list) which schedule work
back onto set_multicast_list_wq. Could this result in a use-after-free
when the pending work executes later, since the priv memory gets freed
during teardown?

[Severity: Critical]
This is a pre-existing issue, but it looks like there might be an
out-of-bounds read when parsing ULE extension headers.

The handle_ule_extensions() loop iterates over extension headers using
handle_one_ule_extension(), which reads memory and advances the pointer:

	p->ule_next_hdr += ext_len;
	p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) );

Is it possible for a malformed payload to specify extension lengths that
push p->ule_next_hdr past the end of the allocated skb buffer? The loop
appears to continue without bounds checking against skb->len, which could
cause a page fault on malicious inputs.

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260905140113.21638-1-breno3011alves@gmail.com?part=3

Re: [PATCH v11 1/3] interconnect: mediatek: fix Makefile typo for mt8196

[sashiko-bot]

> Correct a copy-paste typo in the MediaTek interconnect Makefile that
> mapped mt8196.o to CONFIG_INTERCONNECT_MTK_MT8195 instead of MT8196.
> 
> Assisted-by: OpenCode AI
> Signed-off-by: Breno Rodrigues Alves <breno3011alves@gmail.com>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260905140113.21638-1-breno3011alves@gmail.com?part=1