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| author | Miaoqian Lin <linmq006@gmail.com> | 2022-04-04 14:38:40 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-15 11:31:29 +0200 |
| commit | 0e0fd55719fa081de6f9e5d9e6cef48efb04d34a (patch) | |
| tree | 16de6badb9260a79ae1989599db4cfc408e600d7 /drivers/tty/serial/8250 | |
| parent | 60efd0513916f195dd85bfbf21653f74f9ab019c (diff) | |
| download | linux-0e0fd55719fa081de6f9e5d9e6cef48efb04d34a.tar.bz2 | |
serial: 8250_aspeed_vuart: Fix potential NULL dereference in aspeed_vuart_probe
platform_get_resource() may fail and return NULL, so we should
better check it's return value to avoid a NULL pointer dereference.
Fixes: 54da3e381c2b ("serial: 8250_aspeed_vuart: use UPF_IOREMAP to set up register mapping")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220404143842.16960-1-linmq006@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/8250')
| -rw-r--r-- | drivers/tty/serial/8250/8250_aspeed_vuart.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_aspeed_vuart.c b/drivers/tty/serial/8250/8250_aspeed_vuart.c index 93fe10c680fb..9d2a7856784f 100644 --- a/drivers/tty/serial/8250/8250_aspeed_vuart.c +++ b/drivers/tty/serial/8250/8250_aspeed_vuart.c @@ -429,6 +429,8 @@ static int aspeed_vuart_probe(struct platform_device *pdev) timer_setup(&vuart->unthrottle_timer, aspeed_vuart_unthrottle_exp, 0); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; memset(&port, 0, sizeof(port)); port.port.private_data = vuart; |