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| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2018-02-23 14:38:37 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-25 16:17:58 +0200 |
| commit | d1e7f966521d9f264ae662394210eb44b0b10074 (patch) | |
| tree | 119cabae7d2b45241a0a1987795f62dc8db47876 /drivers/tty/serial/xilinx_uartps.c | |
| parent | 604e648e8bf02b2995afa3b825a074943a5ec4ed (diff) | |
| download | linux-rt-d1e7f966521d9f264ae662394210eb44b0b10074.tar.gz | |
serial: xuartps: Fix out-of-bounds access through DT alias
[ Upstream commit e7d75e18d0fc3f7193b65282b651f980c778d935 ]
The cdns_uart_port[] 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: 928e9263492069ee ("tty: xuartps: Initialize ports according to aliases")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/xilinx_uartps.c')
| -rw-r--r-- | drivers/tty/serial/xilinx_uartps.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 31a630ae0870..21c35ad72b99 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -1115,7 +1115,7 @@ static struct uart_port *cdns_uart_get_port(int id) struct uart_port *port; /* Try the given port id if failed use default method */ - if (cdns_uart_port[id].mapbase != 0) { + if (id < CDNS_UART_NR_PORTS && cdns_uart_port[id].mapbase != 0) { /* Find the next unused port */ for (id = 0; id < CDNS_UART_NR_PORTS; id++) if (cdns_uart_port[id].mapbase == 0) |