Kernel panic at csrow_dev_type_show+25 while reading file under /sys causes sb_edac driver to panic on IvyBridge/Haswell/Broadwell server

Issue

• A RHEL 6.8 system has a kernel panic on a csrow_dev_type_show+25 while reading file under /sys.

[604288.680688] BUG: unable to handle kernel paging request at ffffffffa2998028
[604288.680721] IP: [<ffffffffa02ef4d9>] csrow_dev_type_show+0x19/0x30 [edac_core]
[604288.680752] PGD 1a8f067 PUD 1a93063 PMD 0 
[604288.680784] Oops: 0000 [#1] SMP 
[604288.680807] last sysfs file: /sys/devices/system/edac/mc/mc0/csrow0/dev_type
[604288.680826] CPU 6 
[..]
[604288.690994] Code: 15 2f a0 31 c0 e8 08 59 fb e0 c9 48 98 c3 0f 1f 40 00 55 48 89 e5 0f 1f 44 00 00 48 89 f8 48 89 f7 48 c7 c6 7f 24 2f a0 8b 40 24 <48> 8b 14 c5 e0 15 2f a0 31 c0 e8 d8 58 fb e0 c9 48 98 c3 0f 1f 
[604288.692186] RIP  [<ffffffffa02ef4d9>] csrow_dev_type_show+0x19/0x30 [edac_core]
[604288.692699]  RSP <ffff887fc31d7e78>
[604288.692958] CR2: ffffffffa2998028