cxl/mem: Fix potential memory leak
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: 583fa5e7 ("cxl/mem: Add basic IOCTL interface") Reported-by:Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by:
Ben Widawsky <ben.widawsky@intel.com> Reviewed-by:
Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by:
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Link: https://lore.kernel.org/r/20210221035846.680145-1-ben.widawsky@intel.com Signed-off-by:
Dan Williams <dan.j.williams@intel.com>
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