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BUG: KMSAN: uninit-value in eir_get_length net/bluetooth/hci_event.c:4249 [inline]
BUG: KMSAN: uninit-value in hci_extended_inquiry_result_evt net/bluetooth/hci_event.c:4299 [inline]
BUG: KMSAN: uninit-value in hci_event_packet+0x169f/0x35870 net/bluetooth/hci_event.c:5984
CPU: 0 PID: 11082 Comm: kworker/u5:3 Not tainted 5.6.0-rc6-syzkaller #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+0x1c9/0x220 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
 eir_get_length net/bluetooth/hci_event.c:4249 [inline]
 hci_extended_inquiry_result_evt net/bluetooth/hci_event.c:4299 [inline]
 hci_event_packet+0x169f/0x35870 net/bluetooth/hci_event.c:5984
 hci_rx_work+0xa86/0xd40 net/bluetooth/hci_core.c:4557
 process_one_work+0x1555/0x1f40 kernel/workqueue.c:2266
 worker_thread+0xef6/0x2450 kernel/workqueue.c:2412
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:353

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
 kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127
 kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:82
 slab_alloc_node mm/slub.c:2793 [inline]
 __kmalloc_node_track_caller+0xb40/0x1200 mm/slub.c:4401
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x2fd/0xac0 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1081 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:341 [inline]
 vhci_get_user drivers/bluetooth/hci_vhci.c:165 [inline]
 vhci_write+0x15b/0x800 drivers/bluetooth/hci_vhci.c:285
 call_write_iter include/linux/fs.h:1902 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0xa5a/0xca0 fs/read_write.c:496
 vfs_write+0x44a/0x8f0 fs/read_write.c:558
 ksys_write+0x267/0x450 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+0xb8/0x160 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
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