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| author | Dan Williams <dan.j.williams@intel.com> | 2015-06-30 20:09:39 (GMT) |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2015-06-30 20:09:39 (GMT) |
| commit | 193ccca43850d2355e7690a93ab9d7d78d38f905 (patch) | |
| tree | e70be5b260e1dc2d1d58154c4e17143851c33180 | |
| parent | daa1dee405d7d3d3e816b84a692e838a5647a02a (diff) | |
| download | linux-193ccca43850d2355e7690a93ab9d7d78d38f905.tar.xz | |
nfit: fix smatch "use after null check" report
drivers/acpi/nfit.c:1224 acpi_nfit_blk_region_enable()
error: we previously assumed 'nfit_mem' could be null (see line 1223)
drivers/acpi/nfit.c
1222 nfit_mem = nvdimm_provider_data(nvdimm);
1223 if (!nfit_mem || !nfit_mem->dcr || !nfit_mem->bdw) {
^^^^^^^^
Check.
1224 dev_dbg(dev, "%s: missing%s%s%s\n", __func__,
1225 nfit_mem ? "" : " nfit_mem",
1226 nfit_mem->dcr ? "" : " dcr",
^^^^^^^^^^^^^
Unchecked dereference.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
| -rw-r--r-- | drivers/acpi/nfit.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c index 2161fa1..a20b7c8 100644 --- a/drivers/acpi/nfit.c +++ b/drivers/acpi/nfit.c @@ -1223,8 +1223,8 @@ static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus, if (!nfit_mem || !nfit_mem->dcr || !nfit_mem->bdw) { dev_dbg(dev, "%s: missing%s%s%s\n", __func__, nfit_mem ? "" : " nfit_mem", - nfit_mem->dcr ? "" : " dcr", - nfit_mem->bdw ? "" : " bdw"); + (nfit_mem && nfit_mem->dcr) ? "" : " dcr", + (nfit_mem && nfit_mem->bdw) ? "" : " bdw"); return -ENXIO; } |