5.0-stable review patch. If anyone has any objections, please let me know.
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From: Kangjie Lu kjlu@umn.edu
commit 6734330654dac550f12e932996b868c6d0dcb421 upstream.
In case ioremap fails, the fix returns -ENOMEM to avoid NULL pointer dereferences. Multiple places use port.membase.
Signed-off-by: Kangjie Lu kjlu@umn.edu Cc: stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/tty/serial/mxs-auart.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -1686,6 +1686,10 @@ static int mxs_auart_probe(struct platfo
s->port.mapbase = r->start; s->port.membase = ioremap(r->start, resource_size(r)); + if (!s->port.membase) { + ret = -ENOMEM; + goto out_disable_clks; + } s->port.ops = &mxs_auart_ops; s->port.iotype = UPIO_MEM; s->port.fifosize = MXS_AUART_FIFO_SIZE;