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video: fbdev: fix possible null dereference 

we were dereferencing edid first and the NULL check was after
accessing that. now we are using edid only if we know that
it is not NULL.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Sudip Mukherjee 2015-02-12 21:17:36 +05:30 committed by Tomi Valkeinen
parent 11f09e53af
commit d746b40c64
1 changed files with 3 additions and 3 deletions
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6
drivers/video/fbdev/core/fbmon.c
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@ -624,9 +624,6 @@ static struct fb_videomode *fb_create_modedb(unsigned char *edid, int *dbsize,
int num = 0, i, first = 1;
int ver, rev;
ver = edid[EDID_STRUCT_VERSION];
rev = edid[EDID_STRUCT_REVISION];
mode = kzalloc(50 * sizeof(struct fb_videomode), GFP_KERNEL);
if (mode == NULL)
return NULL;
@ -637,6 +634,9 @@ static struct fb_videomode *fb_create_modedb(unsigned char *edid, int *dbsize,
return NULL;
}
ver = edid[EDID_STRUCT_VERSION];
rev = edid[EDID_STRUCT_REVISION];
*dbsize = 0;
DPRINTK(" Detailed Timings\n");