When submitting a command for userspace, input and output payload bounce
buffers are allocated. For a given command, both input and output
buffers may exist and so when allocation of the input buffer fails, the
output buffer must be freed too.
As far as I can tell, userspace can't easily exploit the leak to OOM a
machine unless the machine was already near OOM state.
Fixes: 583fa5e71c ("cxl/mem: Add basic IOCTL interface")
Reported-by: Konrad Rzeszutek Wilk <email@example.com>
Signed-off-by: Ben Widawsky <firstname.lastname@example.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Konrad Rzeszutek Wilk <email@example.com>
Signed-off-by: Dan Williams <firstname.lastname@example.org>