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BUG: KMSAN: uninit-value in hci_proto_connect_ind include/net/bluetooth/hci_core.h:1224 [inline]
BUG: KMSAN: uninit-value in hci_conn_request_evt net/bluetooth/hci_event.c:2579 [inline]
BUG: KMSAN: uninit-value in hci_event_packet+0x115a6/0x35670 net/bluetooth/hci_event.c:5869
CPU: 1 PID: 13976 Comm: kworker/u5:2 Not tainted 5.4.0-rc3+ #0
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+0x191/0x1f0 lib/dump_stack.c:113
 kmsan_report+0x14a/0x2f0 mm/kmsan/kmsan_report.c:110
 __msan_warning+0x73/0xf0 mm/kmsan/kmsan_instr.c:245
 hci_proto_connect_ind include/net/bluetooth/hci_core.h:1224 [inline]
 hci_conn_request_evt net/bluetooth/hci_event.c:2579 [inline]
 hci_event_packet+0x115a6/0x35670 net/bluetooth/hci_event.c:5869
 hci_rx_work+0x478/0xcc0 net/bluetooth/hci_core.c:4462
 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269
 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 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:151 [inline]
 kmsan_internal_poison_shadow+0x60/0x110 mm/kmsan/kmsan.c:134
 kmsan_slab_alloc+0xaa/0x130 mm/kmsan/kmsan_hooks.c:88
 slab_alloc_node mm/slub.c:2792 [inline]
 __kmalloc_node_track_caller+0xda2/0x13d0 mm/slub.c:4398
 __kmalloc_reserve net/core/skbuff.c:141 [inline]
 __alloc_skb+0x306/0xa10 net/core/skbuff.c:209
 alloc_skb include/linux/skbuff.h:1050 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:339 [inline]
 vhci_get_user drivers/bluetooth/hci_vhci.c:165 [inline]
 vhci_write+0x15b/0x7e0 drivers/bluetooth/hci_vhci.c:284
 call_write_iter include/linux/fs.h:1895 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0xa2c/0xcb0 fs/read_write.c:496
 vfs_write+0x481/0x920 fs/read_write.c:558
 ksys_write+0x265/0x430 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write+0x92/0xb0 fs/read_write.c:620
 __x64_sys_write+0x4a/0x70 fs/read_write.c:620
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
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