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| author | Arvind Sankar <nivedita@alum.mit.edu> | 2020-10-25 10:31:15 -0400 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-10-30 17:35:03 +1100 |
| commit | 458c0480dcb338d7b72e89b2e88a622965adcea4 (patch) | |
| tree | b51f08386220bcd60c1a909f73f36233057acfe2 /include/crypto/sm3_base.h | |
| parent | 1762818f25f3f99c5083caa13d69e5e5aa2e4b6f (diff) | |
| download | linux-458c0480dcb338d7b72e89b2e88a622965adcea4.tar.bz2 | |
crypto: hash - Use memzero_explicit() for clearing state
Without the barrier_data() inside memzero_explicit(), the compiler may
optimize away the state-clearing if it can tell that the state is not
used afterwards.
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto/sm3_base.h')
| -rw-r--r-- | include/crypto/sm3_base.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/crypto/sm3_base.h b/include/crypto/sm3_base.h index 1cbf9aa1fe52..2f3a32ab97bb 100644 --- a/include/crypto/sm3_base.h +++ b/include/crypto/sm3_base.h @@ -13,6 +13,7 @@ #include <crypto/sm3.h> #include <linux/crypto.h> #include <linux/module.h> +#include <linux/string.h> #include <asm/unaligned.h> typedef void (sm3_block_fn)(struct sm3_state *sst, u8 const *src, int blocks); @@ -104,7 +105,7 @@ static inline int sm3_base_finish(struct shash_desc *desc, u8 *out) for (i = 0; i < SM3_DIGEST_SIZE / sizeof(__be32); i++) put_unaligned_be32(sctx->state[i], digest++); - *sctx = (struct sm3_state){}; + memzero_explicit(sctx, sizeof(*sctx)); return 0; } |