==================================================================
BUG: KMSAN: uninit-value in hci_conn_complete_evt net/bluetooth/hci_event.c:2440 [inline]
BUG: KMSAN: uninit-value in hci_event_packet+0x12971/0x35950 net/bluetooth/hci_event.c:5781
CPU: 1 PID: 26505 Comm: kworker/u5:2 Not tainted 5.1.0-rc2+ #21
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci0 hci_rx_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x173/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x131/0x2a0 mm/kmsan/kmsan.c:624
 __msan_warning+0x7a/0xf0 mm/kmsan/kmsan_instr.c:310
 hci_conn_complete_evt net/bluetooth/hci_event.c:2440 [inline]
 hci_event_packet+0x12971/0x35950 net/bluetooth/hci_event.c:5781
 hci_rx_work+0x478/0xcc0 net/bluetooth/hci_core.c:4458
 process_one_work+0x1607/0x2010 kernel/workqueue.c:2269
 worker_thread+0x111c/0x2460 kernel/workqueue.c:2415
 kthread+0x4a1/0x4e0 kernel/kthread.c:254
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:205 [inline]
 kmsan_internal_poison_shadow+0x92/0x150 mm/kmsan/kmsan.c:159
 kmsan_kmalloc+0xa9/0x130 mm/kmsan/kmsan_hooks.c:173
 kmsan_slab_alloc+0xe/0x10 mm/kmsan/kmsan_hooks.c:182
 slab_post_alloc_hook mm/slab.h:441 [inline]
 slab_alloc_node mm/slub.c:2771 [inline]
 __kmalloc_node_track_caller+0xead/0x1000 mm/slub.c:4396
 __kmalloc_reserve net/core/skbuff.c:140 [inline]
 __alloc_skb+0x309/0xa20 net/core/skbuff.c:208
 alloc_skb include/linux/skbuff.h:1059 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:339 [inline]
 bcsp_recv+0x1458/0x2050 drivers/bluetooth/hci_bcsp.c:685
 hci_uart_tty_receive+0x35c/0x5d0 drivers/bluetooth/hci_ldisc.c:607
 tty_ldisc_receive_buf+0x2ea/0x350 drivers/tty/tty_buffer.c:465
 tty_port_default_receive_buf+0x14f/0x1e0 drivers/tty/tty_port.c:38
 receive_buf drivers/tty/tty_buffer.c:481 [inline]
 flush_to_ldisc+0x30c/0x7f0 drivers/tty/tty_buffer.c:533
 process_one_work+0x1607/0x2010 kernel/workqueue.c:2269
 worker_thread+0x111c/0x2460 kernel/workqueue.c:2415
 kthread+0x4a1/0x4e0 kernel/kthread.c:254
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355
==================================================================