Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 105/545] selinux: Add boundary check in put_entry() | Date | Fri, 19 Aug 2022 17:37:55 +0200 |
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From: Xiu Jianfeng <xiujianfeng@huawei.com>
[ Upstream commit 15ec76fb29be31df2bccb30fc09875274cba2776 ]
Just like next_entry(), boundary check is necessary to prevent memory out-of-bound access.
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com> Signed-off-by: Paul Moore <paul@paul-moore.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- security/selinux/ss/policydb.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/security/selinux/ss/policydb.h b/security/selinux/ss/policydb.h index c24d4e1063ea..ffc4e7bad205 100644 --- a/security/selinux/ss/policydb.h +++ b/security/selinux/ss/policydb.h @@ -370,6 +370,8 @@ static inline int put_entry(const void *buf, size_t bytes, int num, struct polic { size_t len = bytes * num; + if (len > fp->len) + return -EINVAL; memcpy(fp->data, buf, len); fp->data += len; fp->len -= len; -- 2.35.1
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