BUG: KASAN: null-ptr-deref in _raw_spin_lock_bh+0x4c/0xc0

From: Sungwoo Kim
Date: Wed Jan 18 2023 - 20:49:46 EST


Write of size 4 at addr 0000000000000098 by task kworker/u3:0/76

CPU: 0 PID: 76 Comm: kworker/u3:0 Not tainted 6.1.0-rc2 #129
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014
Workqueue: hci0 hci_rx_work
Call Trace:
<TASK>
dump_stack_lvl+0x7b/0xb3
print_report+0xed/0x200
? __virt_addr_valid+0x5c/0x240
? kasan_addr_to_slab+0xd/0xa0
? _raw_spin_lock_bh+0x4c/0xc0
kasan_report+0xd3/0x100
? _raw_spin_lock_bh+0x4c/0xc0
kasan_check_range+0x2d3/0x310
__kasan_check_write+0x14/0x20
_raw_spin_lock_bh+0x4c/0xc0
lock_sock_nested+0x3f/0x160
? queue_work_on+0x90/0xd0
l2cap_sock_set_shutdown_cb+0x3d/0x60
l2cap_disconnect_req+0x1e3/0x2e0
l2cap_bredr_sig_cmd+0x3d2/0x5ec0
? vprintk_emit+0x29b/0x4d0
? vprintk_default+0x2b/0x30
? vprintk+0xdc/0x100
? _printk+0x67/0x85
? bt_err+0x7f/0xc0
? bt_err+0x9a/0xc0
l2cap_recv_frame+0x7bc/0x4e10
? _printk+0x67/0x85
? bt_err+0x7f/0xc0
? __wake_up_klogd+0xc4/0xf0
l2cap_recv_acldata+0x327/0x650
? hci_conn_enter_active_mode+0x1b7/0x1f0
hci_rx_work+0x6b7/0x7c0
process_one_work+0x461/0xaf0
worker_thread+0x5f8/0xba0
kthread+0x1c5/0x200
? process_one_work+0xaf0/0xaf0
? kthread_blkcg+0x90/0x90
ret_from_fork+0x1f/0x30
</TASK>