drivers: display: ssd1322: fix out-of-bound access

kartben · dkalowsk · commit 350a5ef3946a · 2025-06-24T20:14:31.000-10:00
Fix memory corruption issue where buffer pointer was not being advanced properly due to missing dereference. Fixes Coverity issue CID 434607 Fixes #81957 Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
diff --git a/drivers/display/ssd1322.c b/drivers/display/ssd1322.c
@@ -118,7 +118,7 @@ static int ssd1322_conv_mono01_grayscale(const uint8_t **buf_in, uint32_t *pixel
 		}
 	}
 
-	buf_in += pixels_in_chunk / 8;
+	*buf_in += pixels_in_chunk / 8;
 	*pixel_count -= pixels_in_chunk;
 	return pixels_in_chunk * segments_per_pixel / SEGMENTS_PER_BYTE;
 }

Original file line number	Diff line number	Diff line change
`@@ -118,7 +118,7 @@ static int ssd1322_conv_mono01_grayscale(const uint8_t *buf_in, uint32_t pixel`
`118`	`118`	`}`
`119`	`119`	`}`
`120`	`120`
`121`		`- buf_in += pixels_in_chunk / 8;`
	`121`	`+ *buf_in += pixels_in_chunk / 8;`
`122`	`122`	`*pixel_count -= pixels_in_chunk;`
`123`	`123`	`return pixels_in_chunk * segments_per_pixel / SEGMENTS_PER_BYTE;`
`124`	`124`	`}`