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71813b0d03
Sync jitterentropy source code with linux-6.12 to solve the
issue of jitterentropy initialization failed:
[ 9.523489] jitterentropy: Initialization failed with host not compliant with requirements: 9
[ 9.661916] kmodloader: 1 module could not be probed
[ 9.662377] kmodloader: - jitterentropy_rng - 0
In linux upstream commit cf27d9475f37 ("crypto: jitter - use
permanent health test storage"), when FIPS crypto is disabled,
the health test results are always explicitly skipped. That means
it will never return error code 9 (health test failed) again.
Fixes: https://github.com/openwrt/openwrt/issues/16684
Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
Link: https://github.com/openwrt/openwrt/pull/18399
Signed-off-by: Robert Marko <robimarko@gmail.com>
37 lines
1.3 KiB
Diff
37 lines
1.3 KiB
Diff
From 95a798d20060d2b648dd604321e347c85edfd783 Mon Sep 17 00:00:00 2001
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From: Stephan Mueller <smueller@chronox.de>
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Date: Mon, 12 Aug 2024 08:25:42 +0200
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Subject: [PATCH] crypto: jitter - set default OSR to 3
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The user space Jitter RNG library uses the oversampling rate of 3 which
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implies that each time stamp is credited with 1/3 bit of entropy. To
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obtain 256 bits of entropy, 768 time stamps need to be sampled. The
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increase in OSR is applied based on a report where the Jitter RNG is
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used on a system exhibiting a challenging environment to collect
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entropy.
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This OSR default value is now applied to the Linux kernel version of
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the Jitter RNG as well.
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The increase in the OSR from 1 to 3 also implies that the Jitter RNG is
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now slower by default.
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Reported-by: Jeff Barnes <jeffbarnes@microsoft.com>
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Signed-off-by: Stephan Mueller <smueller@chronox.com>
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Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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---
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crypto/Kconfig | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/crypto/Kconfig
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+++ b/crypto/Kconfig
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@@ -1345,7 +1345,7 @@ config CRYPTO_JITTERENTROPY_MEMORY_BLOCK
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config CRYPTO_JITTERENTROPY_OSR
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int "CPU Jitter RNG Oversampling Rate"
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range 1 15
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- default 1
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+ default 3
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help
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The Jitter RNG allows the specification of an oversampling rate (OSR).
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The Jitter RNG operation requires a fixed amount of timing
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