lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 18 May 2022 08:56:39 +0800 From: GUO Zihua <guozihua@...wei.com> To: <keyrings@...r.kernel.org> CC: <linux-crypto@...r.kernel.org>, <davem@...emloft.net>, <dhowells@...hat.com>, <herbert@...dor.apana.org.au>, <gustavoars@...nel.org>, <linux-hardening@...r.kernel.org> Subject: [PATCH v2] crypto: Use struct_size() helper in kmalloc() Make use of struct_size() heler for structures containing flexible array member instead of sizeof() which prevents potential issues as well as addressing the following sparse warning: crypto/asymmetric_keys/asymmetric_type.c:155:23: warning: using sizeof on a flexible structure crypto/asymmetric_keys/asymmetric_type.c:247:28: warning: using sizeof on a flexible structure Reference: https://github.com/KSPP/linux/issues/174 Signed-off-by: GUO Zihua <guozihua@...wei.com> --- v2: Use size_add() helper following Kees Cook's suggestion. --- crypto/asymmetric_keys/asymmetric_type.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/crypto/asymmetric_keys/asymmetric_type.c b/crypto/asymmetric_keys/asymmetric_type.c index 41a2f0eb4ce4..e020222b1fe5 100644 --- a/crypto/asymmetric_keys/asymmetric_type.c +++ b/crypto/asymmetric_keys/asymmetric_type.c @@ -152,7 +152,7 @@ struct asymmetric_key_id *asymmetric_key_generate_id(const void *val_1, { struct asymmetric_key_id *kid; - kid = kmalloc(sizeof(struct asymmetric_key_id) + len_1 + len_2, + kid = kmalloc(struct_size(kid, data, size_add(len_1, len_2)), GFP_KERNEL); if (!kid) return ERR_PTR(-ENOMEM); @@ -244,7 +244,7 @@ struct asymmetric_key_id *asymmetric_key_hex_to_key_id(const char *id) if (asciihexlen & 1) return ERR_PTR(-EINVAL); - match_id = kmalloc(sizeof(struct asymmetric_key_id) + asciihexlen / 2, + match_id = kmalloc(struct_size(match_id, data, asciihexlen / 2), GFP_KERNEL); if (!match_id) return ERR_PTR(-ENOMEM); -- 2.36.0
Powered by blists - more mailing lists