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m501fb: don't return zero on failure path in sm501fb_probe()

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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>
This commit is contained in:
Alexey Khoroshilov 2014-11-01 01:40:47 +03:00 committed by Tomi Valkeinen
parent d301a5ac16
commit 816764859a
1 changed files with 1 additions and 0 deletions
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1
drivers/video/fbdev/sm501fb.c
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@ -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;
}