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Chris von Recklinghausen 1789737ca9 PM: hibernate: x86: Use crc32 instead of md5 for hibernation e820 integrity check
[ Upstream commit f5d1499ae2 ]

Hibernation fails on a system in fips mode because md5 is used for the e820
integrity check and is not available. Use crc32 instead.

The check is intended to detect whether the E820 memory map provided
by the firmware after cold boot unexpectedly differs from the one that
was in use when the hibernation image was created. In this case, the
hibernation image cannot be restored, as it may cover memory regions
that are no longer available to the OS.

A non-cryptographic checksum such as CRC-32 is sufficient to detect such
inadvertent deviations.

Fixes: 62a03defea ("PM / hibernate: Verify the consistent of e820 memory map by md5 digest")
Reviewed-by: Eric Biggers <ebiggers@google.com>
Tested-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Chris von Recklinghausen <crecklin@redhat.com>
[ rjw: Subject edit ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-14 09:50:21 +02:00
..
Makefile kbuild: remove cc-option test of -fno-stack-protector 2020-07-07 11:13:10 +09:00
cpu.c x86/cpu: Reinitialize IA32_FEAT_CTL MSR on BSP during wakeup 2020-06-15 14:18:37 +02:00
hibernate.c PM: hibernate: x86: Use crc32 instead of md5 for hibernation e820 integrity check 2021-05-14 09:50:21 +02:00
hibernate_32.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
hibernate_64.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
hibernate_asm_32.S x86/asm/32: Change all ENTRY+ENDPROC to SYM_FUNC_* 2019-10-18 12:03:43 +02:00
hibernate_asm_64.S x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_* 2019-10-18 11:58:33 +02:00