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authorGeert Uytterhoeven <geert+renesas@glider.be>2018-02-23 14:38:36 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-02-28 15:30:00 +0100
commit96c611c2b7bc897a6d16d58c76751f48707a4ac5 (patch)
treef11c899eba93e9783c87d07a989b0e6fd27b02b0 /drivers/tty
parent090fa4b0dccfa3d04e1c5ab0fe4eba16e6713895 (diff)
serial: sirf: Fix out-of-bounds access through DT alias
The sirf_ports[] array is indexed using a value derived from the "serialN" alias in DT, which may lead to an out-of-bounds access. Fix this by adding a range check. Fixes: a6ffe8966acbb66b ("serial: sirf: use dynamic method allocate uart structure") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/sirfsoc_uart.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c
index 9925b00a9777..38622f2a30a9 100644
--- a/drivers/tty/serial/sirfsoc_uart.c
+++ b/drivers/tty/serial/sirfsoc_uart.c
@@ -1283,6 +1283,11 @@ static int sirfsoc_uart_probe(struct platform_device *pdev)
goto err;
}
sirfport->port.line = of_alias_get_id(np, "serial");
+ if (sirfport->port.line >= ARRAY_SIZE(sirf_ports)) {
+ dev_err(&pdev->dev, "serial%d out of range\n",
+ sirfport->port.line);
+ return -EINVAL;
+ }
sirf_ports[sirfport->port.line] = sirfport;
sirfport->port.iotype = UPIO_MEM;
sirfport->port.flags = UPF_BOOT_AUTOCONF;