* [PATCH] ima: Fix misuse of dereference of pointer in template_desc_init_fields()
@ 2022-11-12 9:27 Xiu Jianfeng
2022-11-14 8:37 ` Roberto Sassu
0 siblings, 1 reply; 3+ messages in thread
From: Xiu Jianfeng @ 2022-11-12 9:27 UTC (permalink / raw)
To: zohar, dmitry.kasatkin, paul, jmorris, serge, roberto.sassu
Cc: linux-integrity, linux-security-module, linux-kernel, roberto.sassu
The input parameter @fields is type of struct ima_template_field ***, so
when allocates array memory for @fields, the size of element should be
sizeof(**field) instead of sizeof(*field).
Actually the original code would not cause any runtime error, but it's
better to make it logically right.
Fixes: adf53a778a0a ("ima: new templates management mechanism")
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
---
security/integrity/ima/ima_template.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/security/integrity/ima/ima_template.c b/security/integrity/ima/ima_template.c
index 49f0626928a1..04c49f05cb74 100644
--- a/security/integrity/ima/ima_template.c
+++ b/security/integrity/ima/ima_template.c
@@ -245,11 +245,11 @@ int template_desc_init_fields(const char *template_fmt,
}
if (fields && num_fields) {
- *fields = kmalloc_array(i, sizeof(*fields), GFP_KERNEL);
+ *fields = kmalloc_array(i, sizeof(**fields), GFP_KERNEL);
if (*fields == NULL)
return -ENOMEM;
- memcpy(*fields, found_fields, i * sizeof(*fields));
+ memcpy(*fields, found_fields, i * sizeof(**fields));
*num_fields = i;
}
--
2.17.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* RE: [PATCH] ima: Fix misuse of dereference of pointer in template_desc_init_fields()
2022-11-12 9:27 [PATCH] ima: Fix misuse of dereference of pointer in template_desc_init_fields() Xiu Jianfeng
@ 2022-11-14 8:37 ` Roberto Sassu
2022-11-16 16:54 ` Mimi Zohar
0 siblings, 1 reply; 3+ messages in thread
From: Roberto Sassu @ 2022-11-14 8:37 UTC (permalink / raw)
To: Xiujianfeng, zohar, dmitry.kasatkin, paul, jmorris, serge, roberto.sassu
Cc: linux-integrity, linux-security-module, linux-kernel
> From: Xiujianfeng
> Sent: Saturday, November 12, 2022 10:27 AM
> The input parameter @fields is type of struct ima_template_field ***, so
> when allocates array memory for @fields, the size of element should be
> sizeof(**field) instead of sizeof(*field).
>
> Actually the original code would not cause any runtime error, but it's
> better to make it logically right.
>
> Fixes: adf53a778a0a ("ima: new templates management mechanism")
> Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Reviewed-by: Roberto Sassu <roberto.sassu@huawei.com>
Thanks
Roberto
> ---
> security/integrity/ima/ima_template.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/security/integrity/ima/ima_template.c
> b/security/integrity/ima/ima_template.c
> index 49f0626928a1..04c49f05cb74 100644
> --- a/security/integrity/ima/ima_template.c
> +++ b/security/integrity/ima/ima_template.c
> @@ -245,11 +245,11 @@ int template_desc_init_fields(const char
> *template_fmt,
> }
>
> if (fields && num_fields) {
> - *fields = kmalloc_array(i, sizeof(*fields), GFP_KERNEL);
> + *fields = kmalloc_array(i, sizeof(**fields), GFP_KERNEL);
> if (*fields == NULL)
> return -ENOMEM;
>
> - memcpy(*fields, found_fields, i * sizeof(*fields));
> + memcpy(*fields, found_fields, i * sizeof(**fields));
> *num_fields = i;
> }
>
> --
> 2.17.1
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] ima: Fix misuse of dereference of pointer in template_desc_init_fields()
2022-11-14 8:37 ` Roberto Sassu
@ 2022-11-16 16:54 ` Mimi Zohar
0 siblings, 0 replies; 3+ messages in thread
From: Mimi Zohar @ 2022-11-16 16:54 UTC (permalink / raw)
To: Roberto Sassu, Xiujianfeng, dmitry.kasatkin, paul, jmorris,
serge, roberto.sassu
Cc: linux-integrity, linux-security-module, linux-kernel
On Mon, 2022-11-14 at 08:37 +0000, Roberto Sassu wrote:
> > From: Xiujianfeng
> > Sent: Saturday, November 12, 2022 10:27 AM
> > The input parameter @fields is type of struct ima_template_field ***, so
> > when allocates array memory for @fields, the size of element should be
> > sizeof(**field) instead of sizeof(*field).
> >
> > Actually the original code would not cause any runtime error, but it's
> > better to make it logically right.
> >
> > Fixes: adf53a778a0a ("ima: new templates management mechanism")
> > Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
>
> Reviewed-by: Roberto Sassu <roberto.sassu@huawei.com>
Thanks, applied.
Mimi
^ permalink raw reply [flat|nested] 3+ messages in thread
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2022-11-14 8:37 ` Roberto Sassu
2022-11-16 16:54 ` Mimi Zohar
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