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[ Upstream commit 6dfccd13db2ff2b709ef60a50163925d477549aa ]
AMP_MGR is getting derefernced in hci_phy_link_complete_evt(), when called
from hci_event_packet() and there is a possibility, that hcon->amp_mgr may
not be found when accessing after initialization of hcon.
- net/bluetooth/hci_event.c:4945
The bug seems to get triggered in this line:
bredr_hcon = hcon->amp_mgr->l2cap_conn->hcon;
Fix it by adding a NULL check for the hcon->amp_mgr before checking the ev-status.
Fixes: d5e911928bd8 ("Bluetooth: AMP: Process Physical Link Complete evt")
Reported-and-tested-by: syzbot+0bef568258653cff272f@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?extid=0bef568258653cff272f
Signed-off-by: Anmol Karn <anmol.karan123@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
7ce2c18eb9