* [PATCH] apparmor: use kvfree_sensitive to free data->data
@ 2024-02-01 14:24 Fedor Pchelkin
2024-05-10 15:36 ` John Johansen
0 siblings, 1 reply; 2+ messages in thread
From: Fedor Pchelkin @ 2024-02-01 14:24 UTC (permalink / raw)
To: John Johansen
Cc: Fedor Pchelkin, Paul Moore, James Morris, Serge E. Hallyn,
William Hua, apparmor, linux-security-module, linux-kernel,
lvc-project, Alexey Khoroshilov, stable
Inside unpack_profile() data->data is allocated using kvmemdup() so it
should be freed with the corresponding kvfree_sensitive().
Also add missing data->data release for rhashtable insertion failure path
in unpack_profile().
Found by Linux Verification Center (linuxtesting.org).
Fixes: e025be0f26d5 ("apparmor: support querying extended trusted helper extra data")
Cc: stable@vger.kernel.org
Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
---
security/apparmor/policy.c | 2 +-
security/apparmor/policy_unpack.c | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/security/apparmor/policy.c b/security/apparmor/policy.c
index 957654d253dd..14df15e35695 100644
--- a/security/apparmor/policy.c
+++ b/security/apparmor/policy.c
@@ -225,7 +225,7 @@ static void aa_free_data(void *ptr, void *arg)
{
struct aa_data *data = ptr;
- kfree_sensitive(data->data);
+ kvfree_sensitive(data->data, data->size);
kfree_sensitive(data->key);
kfree_sensitive(data);
}
diff --git a/security/apparmor/policy_unpack.c b/security/apparmor/policy_unpack.c
index 5e578ef0ddff..75452acd0e35 100644
--- a/security/apparmor/policy_unpack.c
+++ b/security/apparmor/policy_unpack.c
@@ -1071,6 +1071,7 @@ static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
if (rhashtable_insert_fast(profile->data, &data->head,
profile->data->p)) {
+ kvfree_sensitive(data->data, data->size);
kfree_sensitive(data->key);
kfree_sensitive(data);
info = "failed to insert data to table";
--
2.43.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] apparmor: use kvfree_sensitive to free data->data
2024-02-01 14:24 [PATCH] apparmor: use kvfree_sensitive to free data->data Fedor Pchelkin
@ 2024-05-10 15:36 ` John Johansen
0 siblings, 0 replies; 2+ messages in thread
From: John Johansen @ 2024-05-10 15:36 UTC (permalink / raw)
To: Fedor Pchelkin
Cc: Paul Moore, James Morris, Serge E. Hallyn, William Hua, apparmor,
linux-security-module, linux-kernel, lvc-project,
Alexey Khoroshilov, stable
On 2/1/24 06:24, Fedor Pchelkin wrote:
> Inside unpack_profile() data->data is allocated using kvmemdup() so it
> should be freed with the corresponding kvfree_sensitive().
>
> Also add missing data->data release for rhashtable insertion failure path
> in unpack_profile().
>
> Found by Linux Verification Center (linuxtesting.org).
>
> Fixes: e025be0f26d5 ("apparmor: support querying extended trusted helper extra data")
> Cc: stable@vger.kernel.org
> Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
Acked-by: John Johansen <john.johansen@canonical.com>
I have pulled this into my tree
> ---
> security/apparmor/policy.c | 2 +-
> security/apparmor/policy_unpack.c | 1 +
> 2 files changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/security/apparmor/policy.c b/security/apparmor/policy.c
> index 957654d253dd..14df15e35695 100644
> --- a/security/apparmor/policy.c
> +++ b/security/apparmor/policy.c
> @@ -225,7 +225,7 @@ static void aa_free_data(void *ptr, void *arg)
> {
> struct aa_data *data = ptr;
>
> - kfree_sensitive(data->data);
> + kvfree_sensitive(data->data, data->size);
> kfree_sensitive(data->key);
> kfree_sensitive(data);
> }
> diff --git a/security/apparmor/policy_unpack.c b/security/apparmor/policy_unpack.c
> index 5e578ef0ddff..75452acd0e35 100644
> --- a/security/apparmor/policy_unpack.c
> +++ b/security/apparmor/policy_unpack.c
> @@ -1071,6 +1071,7 @@ static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
>
> if (rhashtable_insert_fast(profile->data, &data->head,
> profile->data->p)) {
> + kvfree_sensitive(data->data, data->size);
> kfree_sensitive(data->key);
> kfree_sensitive(data);
> info = "failed to insert data to table";
^ permalink raw reply [flat|nested] 2+ messages in thread
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