[Linux-kernel-mentees] [PATCH net] Bluetooth: Fix NULL pointer dereference in amp_read_loc_assoc_final_data()
From: Peilin Ye <hidden>
Date: 2020-08-08 04:06:46
Also in:
linux-bluetooth, linux-kernel-mentees, lkml
Subsystem:
bluetooth subsystem, the rest · Maintainers:
Marcel Holtmann, Luiz Augusto von Dentz, Linus Torvalds
Prevent amp_read_loc_assoc_final_data() from dereferencing `mgr` as NULL.
Reported-and-tested-by: syzbot+f4fb0eaafdb51c32a153@syzkaller.appspotmail.com
Fixes: 9495b2ee757f ("Bluetooth: AMP: Process Chan Selected event")
Signed-off-by: Peilin Ye <redacted>
---
net/bluetooth/amp.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/bluetooth/amp.c b/net/bluetooth/amp.c
index 9c711f0dfae3..be2d469d6369 100644
--- a/net/bluetooth/amp.c
+++ b/net/bluetooth/amp.c@@ -297,6 +297,9 @@ void amp_read_loc_assoc_final_data(struct hci_dev *hdev, struct hci_request req; int err; + if (!mgr) + return; + cp.phy_handle = hcon->handle; cp.len_so_far = cpu_to_le16(0); cp.max_len = cpu_to_le16(hdev->amp_assoc_size);
--
2.25.1