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| author | Eric Biggers <ebiggers@google.com> | 2018-11-03 14:56:00 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-21 09:24:15 +0100 |
| commit | fdc427442b374e84077d4214733764efb1a38a0e (patch) | |
| tree | ff3b1d214f5b0654c1dedc9ca843ab9a42ed8d84 /crypto | |
| parent | 6c75d139608a603642cd731ce75e4222754fff0e (diff) | |
| download | linux-exynos-fdc427442b374e84077d4214733764efb1a38a0e.tar.gz linux-exynos-fdc427442b374e84077d4214733764efb1a38a0e.tar.bz2 linux-exynos-fdc427442b374e84077d4214733764efb1a38a0e.zip | |
crypto: user - fix leaking uninitialized memory to userspace
commit f43f39958beb206b53292801e216d9b8a660f087 upstream.
All bytes of the NETLINK_CRYPTO report structures must be initialized,
since they are copied to userspace. The change from strncpy() to
strlcpy() broke this. As a minimal fix, change it back.
Fixes: 4473710df1f8 ("crypto: user - Prepare for CRYPTO_MAX_ALG_NAME expansion")
Cc: <stable@vger.kernel.org> # v4.12+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/crypto_user.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/crypto/crypto_user.c b/crypto/crypto_user.c index 0dbe2be7f783..b5758768920b 100644 --- a/crypto/crypto_user.c +++ b/crypto/crypto_user.c @@ -83,7 +83,7 @@ static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_cipher rcipher; - strlcpy(rcipher.type, "cipher", sizeof(rcipher.type)); + strncpy(rcipher.type, "cipher", sizeof(rcipher.type)); rcipher.blocksize = alg->cra_blocksize; rcipher.min_keysize = alg->cra_cipher.cia_min_keysize; @@ -102,7 +102,7 @@ static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_comp rcomp; - strlcpy(rcomp.type, "compression", sizeof(rcomp.type)); + strncpy(rcomp.type, "compression", sizeof(rcomp.type)); if (nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS, sizeof(struct crypto_report_comp), &rcomp)) goto nla_put_failure; @@ -116,7 +116,7 @@ static int crypto_report_acomp(struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_acomp racomp; - strlcpy(racomp.type, "acomp", sizeof(racomp.type)); + strncpy(racomp.type, "acomp", sizeof(racomp.type)); if (nla_put(skb, CRYPTOCFGA_REPORT_ACOMP, sizeof(struct crypto_report_acomp), &racomp)) @@ -131,7 +131,7 @@ static int crypto_report_akcipher(struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_akcipher rakcipher; - strlcpy(rakcipher.type, "akcipher", sizeof(rakcipher.type)); + strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type)); if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER, sizeof(struct crypto_report_akcipher), &rakcipher)) @@ -146,7 +146,7 @@ static int crypto_report_kpp(struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_kpp rkpp; - strlcpy(rkpp.type, "kpp", sizeof(rkpp.type)); + strncpy(rkpp.type, "kpp", sizeof(rkpp.type)); if (nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(struct crypto_report_kpp), &rkpp)) @@ -160,10 +160,10 @@ nla_put_failure: static int crypto_report_one(struct crypto_alg *alg, struct crypto_user_alg *ualg, struct sk_buff *skb) { - strlcpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name)); - strlcpy(ualg->cru_driver_name, alg->cra_driver_name, + strncpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name)); + strncpy(ualg->cru_driver_name, alg->cra_driver_name, sizeof(ualg->cru_driver_name)); - strlcpy(ualg->cru_module_name, module_name(alg->cra_module), + strncpy(ualg->cru_module_name, module_name(alg->cra_module), sizeof(ualg->cru_module_name)); ualg->cru_type = 0; @@ -176,7 +176,7 @@ static int crypto_report_one(struct crypto_alg *alg, if (alg->cra_flags & CRYPTO_ALG_LARVAL) { struct crypto_report_larval rl; - strlcpy(rl.type, "larval", sizeof(rl.type)); + strncpy(rl.type, "larval", sizeof(rl.type)); if (nla_put(skb, CRYPTOCFGA_REPORT_LARVAL, sizeof(struct crypto_report_larval), &rl)) goto nla_put_failure; |