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| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2017-09-20 17:58:38 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-05 10:44:00 +0300 |
| commit | 2f9be92dfffec82fbaebc9ff32c749b5764fea19 (patch) | |
| tree | 64ead67877247657df358198b7bdc08a4e57ae9d /security | |
| parent | b60f791ef32db376d55f047748615baee9dc63ef (diff) | |
| download | linux-2f9be92dfffec82fbaebc9ff32c749b5764fea19.tar.xz | |
security/keys: properly zero out sensitive key material in big_key
commit 910801809b2e40a4baedd080ef5d80b4a180e70e upstream.
Error paths forgot to zero out sensitive material, so this patch changes
some kfrees into a kzfrees.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Eric Biggers <ebiggers3@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Kirill Marinushkin <k.marinushkin@gmail.com>
Cc: security@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'security')
| -rw-r--r-- | security/keys/big_key.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/security/keys/big_key.c b/security/keys/big_key.c index 835c1ab30d01..1c93c077d119 100644 --- a/security/keys/big_key.c +++ b/security/keys/big_key.c @@ -194,7 +194,7 @@ int big_key_preparse(struct key_preparsed_payload *prep) *path = file->f_path; path_get(path); fput(file); - kfree(data); + kzfree(data); } else { /* Just store the data in a buffer */ void *data = kmalloc(datalen, GFP_KERNEL); @@ -210,9 +210,9 @@ int big_key_preparse(struct key_preparsed_payload *prep) err_fput: fput(file); err_enckey: - kfree(enckey); + kzfree(enckey); error: - kfree(data); + kzfree(data); return ret; } @@ -226,7 +226,7 @@ void big_key_free_preparse(struct key_preparsed_payload *prep) path_put(path); } - kfree(prep->payload.data[big_key_data]); + kzfree(prep->payload.data[big_key_data]); } /* @@ -258,7 +258,7 @@ void big_key_destroy(struct key *key) path->mnt = NULL; path->dentry = NULL; } - kfree(key->payload.data[big_key_data]); + kzfree(key->payload.data[big_key_data]); key->payload.data[big_key_data] = NULL; } @@ -326,7 +326,7 @@ long big_key_read(const struct key *key, char __user *buffer, size_t buflen) err_fput: fput(file); error: - kfree(data); + kzfree(data); } else { ret = datalen; if (copy_to_user(buffer, key->payload.data[big_key_data], |