4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Iwai <[email protected]>

commit b748f2de4b2f578599f46c6000683a8da755bf68 upstream.

The edac_mem_types[] array misses a MEM_LRDDR4 entry, which leads to
NULL pointer dereference when accessed via sysfs or such.

Signed-off-by: Takashi Iwai <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: Yazen Ghannam <[email protected]>
Cc: linux-edac <[email protected]>
Cc: <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Fixes: 1e8096bb2031 ("EDAC: Add LRDDR4 DRAM type")
Signed-off-by: Borislav Petkov <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 drivers/edac/edac_mc.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -215,6 +215,7 @@ const char * const edac_mem_types[] = {
        [MEM_LRDDR3]    = "Load-Reduced-DDR3-RAM",
        [MEM_DDR4]      = "Unbuffered-DDR4",
        [MEM_RDDR4]     = "Registered-DDR4",
+       [MEM_LRDDR4]    = "Load-Reduced-DDR4-RAM",
        [MEM_NVDIMM]    = "Non-volatile-RAM",
 };
 EXPORT_SYMBOL_GPL(edac_mem_types);


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