===================================================== BUG: KMSAN: uninit-value in hci_proto_connect_ind include/net/bluetooth/hci_core.h:1428 [inline] BUG: KMSAN: uninit-value in hci_conn_request_evt net/bluetooth/hci_event.c:2719 [inline] BUG: KMSAN: uninit-value in hci_event_packet+0xf7bb/0x39e50 net/bluetooth/hci_event.c:6157 CPU: 0 PID: 1976 Comm: kworker/u5:0 Not tainted 5.12.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: hci3 hci_rx_work Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x24c/0x2e0 lib/dump_stack.c:120 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197 hci_proto_connect_ind include/net/bluetooth/hci_core.h:1428 [inline] hci_conn_request_evt net/bluetooth/hci_event.c:2719 [inline] hci_event_packet+0xf7bb/0x39e50 net/bluetooth/hci_event.c:6157 hci_rx_work+0x744/0xcf0 net/bluetooth/hci_core.c:5088 process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2275 worker_thread+0x10ec/0x2340 kernel/workqueue.c:2421 kthread+0x521/0x560 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:120 [inline] kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:103 kmsan_slab_alloc+0x8e/0xe0 mm/kmsan/kmsan_hooks.c:76 slab_alloc_node mm/slub.c:2922 [inline] __kmalloc_node_track_caller+0xa4f/0x1470 mm/slub.c:4609 kmalloc_reserve net/core/skbuff.c:353 [inline] __alloc_skb+0x4dd/0xe90 net/core/skbuff.c:424 alloc_skb include/linux/skbuff.h:1103 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:389 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:165 [inline] vhci_write+0x18a/0x880 drivers/bluetooth/hci_vhci.c:285 call_write_iter include/linux/fs.h:1977 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0x1083/0x1b00 fs/read_write.c:605 ksys_write+0x275/0x500 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write+0x92/0xb0 fs/read_write.c:667 __x64_sys_write+0x4a/0x70 fs/read_write.c:667 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xae =====================================================