===================================================== BUG: KMSAN: uninit-value in hci_proto_connect_ind include/net/bluetooth/hci_core.h:1297 [inline] BUG: KMSAN: uninit-value in hci_conn_request_evt net/bluetooth/hci_event.c:2680 [inline] BUG: KMSAN: uninit-value in hci_event_packet+0x11969/0x33ee0 net/bluetooth/hci_event.c:6025 CPU: 0 PID: 8701 Comm: kworker/u5:2 Not tainted 5.8.0-rc5-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+0x1df/0x240 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 hci_proto_connect_ind include/net/bluetooth/hci_core.h:1297 [inline] hci_conn_request_evt net/bluetooth/hci_event.c:2680 [inline] hci_event_packet+0x11969/0x33ee0 net/bluetooth/hci_event.c:6025 hci_rx_work+0x95f/0xce0 net/bluetooth/hci_core.c:4705 process_one_work+0x1540/0x1f30 kernel/workqueue.c:2269 worker_thread+0xed2/0x23f0 kernel/workqueue.c:2415 kthread+0x515/0x550 kernel/kthread.c:292 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:293 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:80 slab_alloc_node mm/slub.c:2839 [inline] __kmalloc_node_track_caller+0xb40/0x1200 mm/slub.c:4478 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0x2fd/0xac0 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1083 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:377 [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:1908 [inline] new_sync_write fs/read_write.c:503 [inline] vfs_write+0xd98/0x1480 fs/read_write.c:578 ksys_write+0x267/0x450 fs/read_write.c:631 __do_sys_write fs/read_write.c:643 [inline] __se_sys_write+0x92/0xb0 fs/read_write.c:640 __ia32_sys_write+0x4a/0x70 fs/read_write.c:640 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline] __do_fast_syscall_32+0x2aa/0x400 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c =====================================================