diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2018-02-23 14:38:32 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-25 16:46:18 +0200 |
| commit | 0f791ceccb4e543c339e7f2c56ed640634b94dc3 (patch) | |
| tree | c0da914d22c266a966ffc7752f8c41cd0925ae80 | |
| parent | 6b1cab78b629e8597bc6cc1a6f8952dbcfa1bdbc (diff) | |
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>
| -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 079dc47aa142..caa8a41b6e71 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -1663,6 +1663,10 @@ 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; |