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| author | Daniel Axtens <dja@axtens.net> | 2017-03-03 17:56:55 +1100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-22 12:43:40 +0100 |
| commit | ecdc5b12d7a01707b5b3f334cdf47f01e50d2ce3 (patch) | |
| tree | 1bf5c9762d9a050d261dddfa14a78f6d0ed5ddc5 | |
| parent | c40609652267440ae6f800303ea1f3be17d357e2 (diff) | |
| download | linux-stable-ecdc5b12d7a01707b5b3f334cdf47f01e50d2ce3.tar.gz linux-stable-ecdc5b12d7a01707b5b3f334cdf47f01e50d2ce3.tar.bz2 linux-stable-ecdc5b12d7a01707b5b3f334cdf47f01e50d2ce3.zip | |
crypto: powerpc - Fix initialisation of crc32c context
commit aa2be9b3d6d2d699e9ca7cbfc00867c80e5da213 upstream.
Turning on crypto self-tests on a POWER8 shows:
alg: hash: Test 1 failed for crc32c-vpmsum
00000000: ff ff ff ff
Comparing the code with the Intel CRC32c implementation on which
ours is based shows that we are doing an init with 0, not ~0
as CRC32c requires.
This probably wasn't caught because btrfs does its own weird
open-coded initialisation.
Initialise our internal context to ~0 on init.
This makes the self-tests pass, and btrfs continues to work.
Fixes: 6dd7a82cc54e ("crypto: powerpc - Add POWER8 optimised crc32c")
Cc: Anton Blanchard <anton@samba.org>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Acked-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/powerpc/crypto/crc32c-vpmsum_glue.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/crypto/crc32c-vpmsum_glue.c b/arch/powerpc/crypto/crc32c-vpmsum_glue.c index 9fa046d56eba..411994551afc 100644 --- a/arch/powerpc/crypto/crc32c-vpmsum_glue.c +++ b/arch/powerpc/crypto/crc32c-vpmsum_glue.c @@ -52,7 +52,7 @@ static int crc32c_vpmsum_cra_init(struct crypto_tfm *tfm) { u32 *key = crypto_tfm_ctx(tfm); - *key = 0; + *key = ~0; return 0; } |