security/keys: make BIG_KEYS dependent on stdrng.
Since BIG_KEYS can't be compiled as module it requires one of the "stdrng"
providers to be compiled into kernel. Otherwise big_key_crypto_init() fails
on crypto_alloc_rng step and next dereference of big_key_skcipher (e.g. in
big_key_preparse()) results in a NULL pointer dereference.
Fixes: 13100a72f4
('Security: Keys: Big keys stored encrypted')
Signed-off-by: Artem Savkov <asavkov@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Stephan Mueller <smueller@chronox.de>
cc: Kirill Marinushkin <k.marinushkin@gmail.com>
cc: stable@vger.kernel.org
Signed-off-by: James Morris <james.l.morris@oracle.com>
This commit is contained in:
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@ -41,7 +41,7 @@ config BIG_KEYS
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bool "Large payload keys"
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depends on KEYS
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depends on TMPFS
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select CRYPTO
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depends on (CRYPTO_ANSI_CPRNG = y || CRYPTO_DRBG = y)
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select CRYPTO_AES
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select CRYPTO_ECB
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select CRYPTO_RNG
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