diff options
Diffstat (limited to 'crypto/asymmetric_keys')
| -rw-r--r-- | crypto/asymmetric_keys/asymmetric_type.c | 14 | ||||
| -rw-r--r-- | crypto/asymmetric_keys/restrict.c | 7 | ||||
| -rw-r--r-- | crypto/asymmetric_keys/x509_cert_parser.c | 2 | ||||
| -rw-r--r-- | crypto/asymmetric_keys/x509_public_key.c | 2 |
4 files changed, 17 insertions, 8 deletions
diff --git a/crypto/asymmetric_keys/asymmetric_type.c b/crypto/asymmetric_keys/asymmetric_type.c index ba2d9d1ea235..348966ea2175 100644 --- a/crypto/asymmetric_keys/asymmetric_type.c +++ b/crypto/asymmetric_keys/asymmetric_type.c @@ -11,6 +11,7 @@ #include <crypto/public_key.h> #include <linux/seq_file.h> #include <linux/module.h> +#include <linux/overflow.h> #include <linux/slab.h> #include <linux/ctype.h> #include <keys/system_keyring.h> @@ -141,12 +142,17 @@ struct asymmetric_key_id *asymmetric_key_generate_id(const void *val_1, size_t len_2) { struct asymmetric_key_id *kid; - - kid = kmalloc(sizeof(struct asymmetric_key_id) + len_1 + len_2, - GFP_KERNEL); + size_t kid_sz; + size_t len; + + if (check_add_overflow(len_1, len_2, &len)) + return ERR_PTR(-EOVERFLOW); + if (check_add_overflow(sizeof(struct asymmetric_key_id), len, &kid_sz)) + return ERR_PTR(-EOVERFLOW); + kid = kmalloc(kid_sz, GFP_KERNEL); if (!kid) return ERR_PTR(-ENOMEM); - kid->len = len_1 + len_2; + kid->len = len; memcpy(kid->data, val_1, len_1); memcpy(kid->data + len_1, val_2, len_2); return kid; diff --git a/crypto/asymmetric_keys/restrict.c b/crypto/asymmetric_keys/restrict.c index afcd4d101ac5..86292965f493 100644 --- a/crypto/asymmetric_keys/restrict.c +++ b/crypto/asymmetric_keys/restrict.c @@ -17,9 +17,12 @@ static struct asymmetric_key_id *ca_keyid; #ifndef MODULE static struct { - struct asymmetric_key_id id; - unsigned char data[10]; + /* Must be last as it ends in a flexible-array member. */ + TRAILING_OVERLAP(struct asymmetric_key_id, id, data, + unsigned char data[10]; + ); } cakey; +static_assert(offsetof(typeof(cakey), id.data) == offsetof(typeof(cakey), data)); static int __init ca_keys_setup(char *str) { diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c index 8df3fa60a44f..b37cae914987 100644 --- a/crypto/asymmetric_keys/x509_cert_parser.c +++ b/crypto/asymmetric_keys/x509_cert_parser.c @@ -60,7 +60,7 @@ EXPORT_SYMBOL_GPL(x509_free_certificate); */ struct x509_certificate *x509_cert_parse(const void *data, size_t datalen) { - struct x509_certificate *cert __free(x509_free_certificate); + struct x509_certificate *cert __free(x509_free_certificate) = NULL; struct x509_parse_context *ctx __free(kfree) = NULL; struct asymmetric_key_id *kid; long ret; diff --git a/crypto/asymmetric_keys/x509_public_key.c b/crypto/asymmetric_keys/x509_public_key.c index 8409d7d36cb4..12e3341e806b 100644 --- a/crypto/asymmetric_keys/x509_public_key.c +++ b/crypto/asymmetric_keys/x509_public_key.c @@ -148,7 +148,7 @@ not_self_signed: */ static int x509_key_preparse(struct key_preparsed_payload *prep) { - struct x509_certificate *cert __free(x509_free_certificate); + struct x509_certificate *cert __free(x509_free_certificate) = NULL; struct asymmetric_key_ids *kids __free(kfree) = NULL; char *p, *desc __free(kfree) = NULL; const char *q; |