acpi, nfit: fix register dimm error handling
authorToshi Kani <toshi.kani@hpe.com>
Fri, 2 Feb 2018 21:00:36 +0000 (14:00 -0700)
committerDan Williams <dan.j.williams@intel.com>
Fri, 2 Feb 2018 21:49:29 +0000 (13:49 -0800)
commit23fbd7c70aec7600e3227eb24259fc55bf6e4881
tree55e8986f9632c035151cdfcaa5aeae32b5f08511
parentf2ba5a5baecf795c2150826bd0c95fc3f7f3d226
acpi, nfit: fix register dimm error handling

A NULL pointer reference kernel bug was observed when
acpi_nfit_add_dimm() called in acpi_nfit_register_dimms() failed. This
error path does not set nfit_mem->nvdimm, but the 2nd
list_for_each_entry() loop in the function assumes it's always set. Add
a check to nfit_mem->nvdimm.

Cc: <stable@vger.kernel.org>
Fixes: ba9c8dd3c222 ("acpi, nfit: add dimm device notification support")
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
drivers/acpi/nfit/core.c