[Linux-kernel-mentees] [PATCH] Bluetooth: Fix memory leak in read_adv_mon_features()

[Peilin Ye]

read_adv_mon_features() is leaking memory. Free `rp` before returning.

Fixes: e5e1e7fd470c ("Bluetooth: Add handler of 
MGMT_OP_READ_ADV_MONITOR_FEATURES")
Reported-and-tested-by: syzbot+f7f6e564f4202d860...@syzkaller.appspotmail.com
Signed-off-by: Peilin Ye <yepeilin...@gmail.com>
---
 net/bluetooth/mgmt.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 5bbe71002fb9..f96251f818fc 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -4157,7 +4157,7 @@ static int read_adv_mon_features(struct sock *sk, struct 
hci_dev *hdev,
 {
        struct adv_monitor *monitor = NULL;
        struct mgmt_rp_read_adv_monitor_features *rp = NULL;
-       int handle;
+       int handle, err;
        size_t rp_size = 0;
        __u32 supported = 0;
        __u16 num_handles = 0;
@@ -4192,9 +4192,13 @@ static int read_adv_mon_features(struct sock *sk, struct 
hci_dev *hdev,
        if (num_handles)
                memcpy(&rp->handles, &handles, (num_handles * sizeof(u16)));
 
-       return mgmt_cmd_complete(sk, hdev->id,
-                                MGMT_OP_READ_ADV_MONITOR_FEATURES,
-                                MGMT_STATUS_SUCCESS, rp, rp_size);
+       err = mgmt_cmd_complete(sk, hdev->id,
+                               MGMT_OP_READ_ADV_MONITOR_FEATURES,
+                               MGMT_STATUS_SUCCESS, rp, rp_size);
+
+       kfree(rp);
+
+       return err;
 }
 
 static int add_adv_patterns_monitor(struct sock *sk, struct hci_dev *hdev,
-- 
2.25.1