[PATCH v2 0/2] media: Fix gcc8 warnings

[PATCH v2 0/2] media: Fix gcc8 warnings

[Ricardo Ribalda]

Kernel 6.14 has increased its minimum gcc requirements. After bumping
the "ancient" test in media-ci 2 new warnings have been found. Let's try
to fix them.

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
Changes in v2:
- Incorporate Hans changes.
- Add comment (Thanks Andy).
- EDITME: describe what is new in this series revision.
- EDITME: use bulletpoints and terse descriptions.
- Link to v1: https://lore.kernel.org/r/20250331-v614-v1-0-9bc69a873720@chromium.org

---
Hans Verkuil (1):
      media: cec: extron-da-hd-4k-plus: Fix Wformat-truncation

Ricardo Ribalda (1):
      media: atomisp: Fix Wformat-truncation warning

 drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.c  | 4 ++--
 drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c | 3 ++-
 2 files changed, 4 insertions(+), 3 deletions(-)
---
base-commit: 4e82c87058f45e79eeaa4d5bcc3b38dd3dce7209
change-id: 20250331-v614-8485d3382935

Best regards,
-- 
Ricardo Ribalda <ribalda@chromium.org>

[PATCH v2 1/2] media: atomisp: Fix Wformat-truncation warning

[Ricardo Ribalda]

Gcc8 is convinced that we do not have enough space in dot_id_input_bin.
Extend the variable 17 bytes which is just used for debugging.

drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c:1336:9: warning: '(pipe' directive output may be truncated writing 5 bytes into a region of size between 1 and 74 [-Wformat-truncation=]

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
 drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c b/drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c
index 9818771a35e550c0ce98da826caff5f834867e7c..84220359c9576b0021ea7ac7ba13548bd77e49fd 100644
--- a/drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c
+++ b/drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c
@@ -121,7 +121,8 @@ static const char *const pipe_id_to_str[] = {
 	/* [IA_CSS_PIPE_ID_YUVPP]     =*/ "yuvpp",
 };
 
-static char dot_id_input_bin[SH_CSS_MAX_BINARY_NAME + 10];
+/* 27 is combined length of _stage%d(pipe%d)\0. */
+static char dot_id_input_bin[SH_CSS_MAX_BINARY_NAME + 27];
 static char ring_buffer[200];
 
 void ia_css_debug_dtrace(unsigned int level, const char *fmt, ...)

-- 
2.49.0.472.ge94155a9ec-goog

[PATCH v2 2/2] media: cec: extron-da-hd-4k-plus: Fix Wformat-truncation

[Ricardo Ribalda]

From: Hans Verkuil <hverkuil@xs4all.nl>

Fix gcc8 warning:

drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.c:1014:44: warning: 'DCEC' directive output may be truncated writing 4 bytes into a region of size between 0 and 53 [-Wformat-truncation=]

Resizing the 'buf' and 'cmd' arrays fixed the warning.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
 drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.c b/drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.c
index cfbfc4c1b2e67fec9434aa6852ab465ad8c11225..41d019b01ec09d1d3e72c89155042888b7948463 100644
--- a/drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.c
+++ b/drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.c
@@ -1002,8 +1002,8 @@ static int extron_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
 				    u32 signal_free_time, struct cec_msg *msg)
 {
 	struct extron_port *port = cec_get_drvdata(adap);
-	char buf[CEC_MAX_MSG_SIZE * 3 + 1];
-	char cmd[CEC_MAX_MSG_SIZE * 3 + 13];
+	char buf[(CEC_MAX_MSG_SIZE - 1) * 3 + 1];
+	char cmd[sizeof(buf) + 14];
 	unsigned int i;
 
 	if (port->disconnected)

-- 
2.49.0.472.ge94155a9ec-goog

Re: [PATCH v2 1/2] media: atomisp: Fix Wformat-truncation warning

[Andy Shevchenko]

On Tue, Apr 01, 2025 at 02:17:54PM +0000, Ricardo Ribalda wrote:
> Gcc8 is convinced that we do not have enough space in dot_id_input_bin.
> Extend the variable 17 bytes which is just used for debugging.
> 
> drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c:1336:9: warning: '(pipe' directive output may be truncated writing 5 bytes into a region of size between 1 and 74 [-Wformat-truncation=]

Note, you may drop the drivers/staging/media/ as the driver is unique enough.

Reviewed-by: Andy Shevchenko <andy@kernel.org>

...

You also want to send this patch separately since the AtomISP has its own
MAINTAINERS record (and there are patches in the queue there, IIRC).

-- 
With Best Regards,
Andy Shevchenko