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23 October 2021, 00:29:24 UTC
Revision 78ce241099bb363b19dbd0245442e66c8de8f567 authored by Borislav Petkov on 17 May 2018, 08:46:26 UTC, committed by Thomas Gleixner on 19 May 2018, 13:19:30 UTC 
x86/MCE/AMD: Cache SMCA MISC block addresses
 
... into a global, two-dimensional array and service subsequent reads from
that cache to avoid rdmsr_on_cpu() calls during CPU hotplug (IPIs with IRQs
disabled).

In addition, this fixes a KASAN slab-out-of-bounds read due to wrong usage
of the bank->blocks pointer.

Fixes: 27bd59502702 ("x86/mce/AMD: Get address from already initialized block")
Reported-by: Johannes Hirte <johannes.hirte@datenkhaos.de>
Tested-by: Johannes Hirte <johannes.hirte@datenkhaos.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Yazen Ghannam <yazen.ghannam@amd.com>
Link: http://lkml.kernel.org/r/20180414004230.GA2033@probook
1 parent 73fcb1a
History
Tip revision: 78ce241099bb363b19dbd0245442e66c8de8f567 authored by Borislav Petkov on 17 May 2018, 08:46:26 UTC
x86/MCE/AMD: Cache SMCA MISC block addresses
Tip revision: 78ce241
File Mode Size
asymmetric-parser.h -rw-r--r-- 1.2 KB
asymmetric-subtype.h -rw-r--r-- 1.6 KB
asymmetric-type.h -rw-r--r-- 2.9 KB
big_key-type.h -rw-r--r-- 950 bytes
ceph-type.h -rw-r--r-- 162 bytes
dns_resolver-type.h -rw-r--r-- 689 bytes
encrypted-type.h -rw-r--r-- 1.2 KB
keyring-type.h -rw-r--r-- 544 bytes
rxrpc-type.h -rw-r--r-- 4.4 KB
system_keyring.h -rw-r--r-- 1.7 KB
trusted-type.h -rw-r--r-- 1.2 KB
user-type.h -rw-r--r-- 2.1 KB
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