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| author | Alexey Khoroshilov <khoroshilov@ispras.ru> | 2014-11-01 01:40:47 +0300 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-11-06 16:41:36 +0200 |
| commit | 816764859a5347315cb2f1578cf0252ee129c128 (patch) | |
| tree | e8a065da665352fcbc1b63712b80651f75fd07da /drivers/video/fbdev/sm501fb.c | |
| parent | d301a5ac1688bf99039adb10b4516b465f1f7a83 (diff) | |
| download | linux-stable-816764859a5347315cb2f1578cf0252ee129c128.tar.gz linux-stable-816764859a5347315cb2f1578cf0252ee129c128.tar.bz2 linux-stable-816764859a5347315cb2f1578cf0252ee129c128.zip | |
m501fb: don't return zero on failure path in sm501fb_probe()
If no framebuffers found, sm501fb_probe() breaks off initialization,
deallocates sm501fb_info, but returns zero. As a result, use after free
can happen in sm501fb_remove().
The patch adds -ENODEV as a return value in this case.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video/fbdev/sm501fb.c')
| -rw-r--r-- | drivers/video/fbdev/sm501fb.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/video/fbdev/sm501fb.c b/drivers/video/fbdev/sm501fb.c index 9e74e8fbe074..8b98b011fc04 100644 --- a/drivers/video/fbdev/sm501fb.c +++ b/drivers/video/fbdev/sm501fb.c @@ -1988,6 +1988,7 @@ static int sm501fb_probe(struct platform_device *pdev) if (info->fb[HEAD_PANEL] == NULL && info->fb[HEAD_CRT] == NULL) { dev_err(dev, "no framebuffers found\n"); + ret = -ENODEV; goto err_alloc; } |