diff options
| author | Anton Vasilyev <vasilyev@ispras.ru> | 2017-08-21 16:49:58 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2017-08-21 16:49:58 +0200 |
| commit | 7af9a52e33ea07937fc216104e2cf3d4e690b43f (patch) | |
| tree | 9e1e1192883abd93f5edfa81192340d3ceba51b7 /drivers/video | |
| parent | fbdev: i810: make fb_ops const (diff) | |
| download | linux-7af9a52e33ea07937fc216104e2cf3d4e690b43f.tar.xz linux-7af9a52e33ea07937fc216104e2cf3d4e690b43f.zip | |
video: fbdev: udlfb: Fix use after free on dlfb_usb_probe error path
If dlfb_usb_probe drops to error path then there is only one
kref_init() call and no kref_get(), so second kref_put() leads to
use after free.
The patch removes superfluous kref_put on dlfb_usb_probe error path.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru>
Cc: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/fbdev/udlfb.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/video/fbdev/udlfb.c b/drivers/video/fbdev/udlfb.c index d0d29743dae2..ef08a104fb42 100644 --- a/drivers/video/fbdev/udlfb.c +++ b/drivers/video/fbdev/udlfb.c @@ -1655,7 +1655,6 @@ static int dlfb_usb_probe(struct usb_interface *interface, error: if (dev) { - kref_put(&dev->kref, dlfb_free); /* ref for framebuffer */ kref_put(&dev->kref, dlfb_free); /* last ref from kref_init */ /* dev has been deallocated. Do not dereference */ |