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selinux: Use struct_size() helper in kmalloc() 

Make use of struct_size() helper instead of an open-coded calculation.

Link: https://github.com/KSPP/linux/issues/160
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Xiu Jianfeng 2021-12-02 15:35:33 +08:00 committed by Paul Moore
parent 6326948f94
commit 5fe3757289
2 changed files with 3 additions and 3 deletions
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2
security/selinux/ss/sidtab.c
View File

@ -570,7 +570,7 @@ void sidtab_sid2str_put(struct sidtab *s, struct sidtab_entry *entry,
goto out_unlock;
}
cache = kmalloc(sizeof(struct sidtab_str_cache) + str_len, GFP_ATOMIC);
cache = kmalloc(struct_size(cache, str, str_len), GFP_ATOMIC);
if (!cache)
goto out_unlock;

4
security/selinux/xfrm.c
View File

@ -89,7 +89,7 @@ static int selinux_xfrm_alloc_user(struct xfrm_sec_ctx **ctxp,
if (str_len >= PAGE_SIZE)
return -ENOMEM;
ctx = kmalloc(sizeof(*ctx) + str_len + 1, gfp);
ctx = kmalloc(struct_size(ctx, ctx_str, str_len + 1), gfp);
if (!ctx)
return -ENOMEM;
@ -360,7 +360,7 @@ int selinux_xfrm_state_alloc_acquire(struct xfrm_state *x,
if (rc)
return rc;
ctx = kmalloc(sizeof(*ctx) + str_len, GFP_ATOMIC);
ctx = kmalloc(struct_size(ctx, ctx_str, str_len), GFP_ATOMIC);
if (!ctx) {
rc = -ENOMEM;
goto out;