| Message ID | 1484734911-5299-1-git-send-email-arvind.yadav.cs@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/video/fbdev/stifb.c b/drivers/video/fbdev/stifb.c index accfef7..d5deab3 100644 --- a/drivers/video/fbdev/stifb.c +++ b/drivers/video/fbdev/stifb.c @@ -1294,6 +1294,10 @@ static int __init stifb_init_fb(struct sti_struct *sti, int bpp_pref) strcpy(fix->id, "stifb"); info->fbops = &stifb_ops; info->screen_base = ioremap_nocache(REGION_BASE(fb,1), fix->smem_len); + if (!info->screen_base) { + printk(KERN_ERR "stifb: Failed to Map memory\n"); + goto out_err0; + } info->screen_size = fix->smem_len; info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA; info->pseudo_palette = &fb->pseudo_palette;
Here, If ioremap_nocache will fail. It will return NULL. Kernel can run into a NULL-pointer dereference. This error check will avoid NULL pointer dereference. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> --- drivers/video/fbdev/stifb.c | 4 ++++ 1 file changed, 4 insertions(+)