diff options
| author | Hongbo Li <herberthbli@tencent.com> | 2021-06-04 09:30:35 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-06-11 10:03:30 +0300 |
| commit | 5cd259ca5d466f65ffd21e2e2fa00fb648a8c555 (patch) | |
| tree | f68c657bb63dc0f6bd8617774eee800c82c7c3bd /crypto/sm2.c | |
| parent | 9039878ade5d7ec6ac8db299ab8e7d0d563e3447 (diff) | |
| download | linux-5cd259ca5d466f65ffd21e2e2fa00fb648a8c555.tar.xz | |
crypto: sm2 - fix a memory leak in sm2
SM2 module alloc ec->Q in sm2_set_pub_key(), when doing alg test in
test_akcipher_one(), it will set public key for every test vector,
and don't free ec->Q. This will cause a memory leak.
This patch alloc ec->Q in sm2_ec_ctx_init().
Fixes: ea7ecb66440b ("crypto: sm2 - introduce OSCCA SM2 asymmetric cipher algorithm")
Signed-off-by: Hongbo Li <herberthbli@tencent.com>
Reviewed-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/sm2.c')
| -rw-r--r-- | crypto/sm2.c | 24 |
1 files changed, 10 insertions, 14 deletions
diff --git a/crypto/sm2.c b/crypto/sm2.c index b21addc3ac06..db8a4a265669 100644 --- a/crypto/sm2.c +++ b/crypto/sm2.c @@ -79,10 +79,17 @@ static int sm2_ec_ctx_init(struct mpi_ec_ctx *ec) goto free; rc = -ENOMEM; + + ec->Q = mpi_point_new(0); + if (!ec->Q) + goto free; + /* mpi_ec_setup_elliptic_curve */ ec->G = mpi_point_new(0); - if (!ec->G) + if (!ec->G) { + mpi_point_release(ec->Q); goto free; + } mpi_set(ec->G->x, x); mpi_set(ec->G->y, y); @@ -91,6 +98,7 @@ static int sm2_ec_ctx_init(struct mpi_ec_ctx *ec) rc = -EINVAL; ec->n = mpi_scanval(ecp->n); if (!ec->n) { + mpi_point_release(ec->Q); mpi_point_release(ec->G); goto free; } @@ -386,27 +394,15 @@ static int sm2_set_pub_key(struct crypto_akcipher *tfm, MPI a; int rc; - ec->Q = mpi_point_new(0); - if (!ec->Q) - return -ENOMEM; - /* include the uncompressed flag '0x04' */ - rc = -ENOMEM; a = mpi_read_raw_data(key, keylen); if (!a) - goto error; + return -ENOMEM; mpi_normalize(a); rc = sm2_ecc_os2ec(ec->Q, a); mpi_free(a); - if (rc) - goto error; - - return 0; -error: - mpi_point_release(ec->Q); - ec->Q = NULL; return rc; } |