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| author | James Morse <james.morse@arm.com> | 2019-01-29 18:48:39 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-05 15:27:09 +0100 |
| commit | 5b16614297970daad30328246c7b6611699552d0 (patch) | |
| tree | df0002ad27905136aad3c0e33207979af826c769 /certs | |
| parent | a51e77dc47362ecad623bdab6add43b216f15ffa (diff) | |
ACPI / APEI: Switch estatus pool to use vmalloc memory
[ Upstream commit 0ac234be1a9497498e57d958f4251f5257b116b4 ]
The ghes code is careful to parse and round firmware's advertised
memory requirements for CPER records, up to a maximum of 64K.
However when ghes_estatus_pool_expand() does its work, it splits
the requested size into PAGE_SIZE granules.
This means if firmware generates 5K of CPER records, and correctly
describes this in the table, __process_error() will silently fail as it
is unable to allocate more than PAGE_SIZE.
Switch the estatus pool to vmalloc() memory. On x86 vmalloc() memory
may fault and be fixed up by vmalloc_fault(). To prevent this call
vmalloc_sync_all() before an NMI handler could discover the memory.
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'certs')
0 files changed, 0 insertions, 0 deletions