提交 ee6581ce 编写于 作者: D Dave Jiang

nfit: fix unchecked dereference in acpi_nfit_ctl

Incremental patch to fix the unchecked dereference in acpi_nfit_ctl.
Reported by Dan Carpenter:

"acpi/nfit: fix cmd_rc for acpi_nfit_ctl to
always return a value" from Jun 28, 2018, leads to the following
Smatch complaint:

    drivers/acpi/nfit/core.c:578 acpi_nfit_ctl()
     warn: variable dereferenced before check 'cmd_rc' (see line 411)

drivers/acpi/nfit/core.c
   410
   411		*cmd_rc = -EINVAL;
                ^^^^^^^^^^^^^^^^^^
Patch adds unchecked dereference.

Fixes: c1985cef ("acpi/nfit: fix cmd_rc for acpi_nfit_ctl to always return a value")
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
上级 33cc2c96
......@@ -408,7 +408,8 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
const guid_t *guid;
int rc, i;
*cmd_rc = -EINVAL;
if (cmd_rc)
*cmd_rc = -EINVAL;
func = cmd;
if (cmd == ND_CMD_CALL) {
call_pkg = buf;
......@@ -519,7 +520,8 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
* If we return an error (like elsewhere) then caller wouldn't
* be able to rely upon data returned to make calculation.
*/
*cmd_rc = 0;
if (cmd_rc)
*cmd_rc = 0;
return 0;
}
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册