Fix a possible null pointer dereference, there is otherwise a risk of a possible null pointer dereference
This was found using a static code analysis program called cppcheck
Signed-off-by: Rickard Strandqvist <[email protected]>
---
drivers/video/fbdev/core/fbmon.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/video/fbdev/core/fbmon.c b/drivers/video/fbdev/core/fbmon.c
index 5b0e313..9ec81ee 100644
--- a/drivers/video/fbdev/core/fbmon.c
+++ b/drivers/video/fbdev/core/fbmon.c
@@ -608,6 +608,11 @@ static struct fb_videomode *fb_create_modedb(unsigned char *edid, int *dbsize)
int num = 0, i, first = 1;
int ver, rev;
+ if (edid == NULL || !edid_checksum(edid) ||
+ !edid_check_header(edid)) {
+ return NULL;
+ }
+
ver = edid[EDID_STRUCT_VERSION];
rev = edid[EDID_STRUCT_REVISION];
@@ -615,12 +620,6 @@ static struct fb_videomode *fb_create_modedb(unsigned char *edid, int *dbsize)
if (mode == NULL)
return NULL;
- if (edid == NULL || !edid_checksum(edid) ||
- !edid_check_header(edid)) {
- kfree(mode);
- return NULL;
- }
-
*dbsize = 0;
DPRINTK(" Detailed Timings\n");
--
1.7.10.4