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Bluetooth: Fix potential use-after-free when clear keys

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[ Upstream commit 3673952cf0 ]

Similar to commit c5d2b6fa26 ("Bluetooth: Fix use-after-free in
hci_remove_ltk/hci_remove_irk"). We can not access k after kfree_rcu()
call.

Fixes: d7d41682ef ("Bluetooth: Fix Suspicious RCU usage warnings")
Signed-off-by: Min Li <lm0963hack@gmail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Min Li
2023-08-07 19:07:41 +08:00
committed by Greg Kroah-Hartman
parent 7b0243d26a
commit 942d8cefb0
1 changed files with 8 additions and 8 deletions
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16
net/bluetooth/hci_core.c
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@@ -2355,9 +2355,9 @@ void hci_uuids_clear(struct hci_dev *hdev)
void hci_link_keys_clear(struct hci_dev *hdev)
{
struct link_key *key;
struct link_key *key, *tmp;
list_for_each_entry(key, &hdev->link_keys, list) {
list_for_each_entry_safe(key, tmp, &hdev->link_keys, list) {
list_del_rcu(&key->list);
kfree_rcu(key, rcu);
}
@@ -2365,9 +2365,9 @@ void hci_link_keys_clear(struct hci_dev *hdev)
void hci_smp_ltks_clear(struct hci_dev *hdev)
{
struct smp_ltk *k;
struct smp_ltk *k, *tmp;
list_for_each_entry(k, &hdev->long_term_keys, list) {
list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
list_del_rcu(&k->list);
kfree_rcu(k, rcu);
}
@@ -2375,9 +2375,9 @@ void hci_smp_ltks_clear(struct hci_dev *hdev)
void hci_smp_irks_clear(struct hci_dev *hdev)
{
struct smp_irk *k;
struct smp_irk *k, *tmp;
list_for_each_entry(k, &hdev->identity_resolving_keys, list) {
list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
list_del_rcu(&k->list);
kfree_rcu(k, rcu);
}
@@ -2385,9 +2385,9 @@ void hci_smp_irks_clear(struct hci_dev *hdev)
void hci_blocked_keys_clear(struct hci_dev *hdev)
{
struct blocked_key *b;
struct blocked_key *b, *tmp;
list_for_each_entry(b, &hdev->blocked_keys, list) {
list_for_each_entry_safe(b, tmp, &hdev->blocked_keys, list) {
list_del_rcu(&b->list);
kfree_rcu(b, rcu);
}