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| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2018-02-23 16:38:32 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-25 17:13:14 +0300 |
| commit | 2e876eae48736674bf2c5caa9c49566dffabb991 (patch) | |
| tree | f446c219194b81170d0867fa958dbf3e6d7c37cf /drivers/tty/serial | |
| parent | 2803df3004f05ed6649e01cbf16224be0c845494 (diff) | |
| download | linux-2e876eae48736674bf2c5caa9c49566dffabb991.tar.xz | |
serial: mxs-auart: Fix out-of-bounds access through serial port index
[ Upstream commit dd345a31bfdec350d2593e6de5964e55c7f19c76 ]
The auart_port[] array is indexed using a value derived from the
"serialN" alias in DT, or from platform data, which may lead to an
out-of-bounds access.
Fix this by adding a range check.
Fixes: 1ea6607d4cdc9179 ("serial: mxs-auart: Allow device tree probing")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/mxs-auart.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c index 07390f8c3681..1d9d778828ba 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -1664,6 +1664,10 @@ static int mxs_auart_probe(struct platform_device *pdev) s->port.line = pdev->id < 0 ? 0 : pdev->id; else if (ret < 0) return ret; + if (s->port.line >= ARRAY_SIZE(auart_port)) { + dev_err(&pdev->dev, "serial%d out of range\n", s->port.line); + return -EINVAL; + } if (of_id) { pdev->id_entry = of_id->data; |