The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x 2bc73505a5cd2a18a7a542022722f136c19e3b87 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024072905-twirl-endless-6a91@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^..

Possible dependencies:

2bc73505a5cd ("apparmor: use kvfree_sensitive to free data->data") 000518bc5aef ("apparmor: fix missing error check for rhashtable_insert_fast") 453431a54934 ("mm, treewide: rename kzfree() to kfree_sensitive()") 45365a06aa30 ("Merge tag 's390-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 2bc73505a5cd2a18a7a542022722f136c19e3b87 Mon Sep 17 00:00:00 2001 From: Fedor Pchelkin pchelkin@ispras.ru Date: Thu, 1 Feb 2024 17:24:48 +0300 Subject: [PATCH] apparmor: use kvfree_sensitive to free data->data

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 Signed-off-by: John Johansen john.johansen@canonical.com

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";