=====================================================
BUG: KMSAN: uninit-value in hci_conn_complete_evt net/bluetooth/hci_event.c:2604 [inline]
BUG: KMSAN: uninit-value in hci_event_packet+0xfa0a/0x39e50 net/bluetooth/hci_event.c:6153
CPU: 0 PID: 1973 Comm: kworker/u5:0 Not tainted 5.11.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci2 hci_rx_work
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 hci_conn_complete_evt net/bluetooth/hci_event.c:2604 [inline]
 hci_event_packet+0xfa0a/0x39e50 net/bluetooth/hci_event.c:6153
 hci_rx_work+0x744/0xcf0 net/bluetooth/hci_core.c:4971
 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:296

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76
 slab_alloc_node mm/slub.c:2907 [inline]
 __kmalloc_node_track_caller+0xa37/0x1430 mm/slub.c:4527
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x2f8/0xb30 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1099 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:389 [inline]
 bcsp_recv+0x14f0/0x20d0 drivers/bluetooth/hci_bcsp.c:673
 hci_uart_tty_receive+0x3a9/0x790 drivers/bluetooth/hci_ldisc.c:614
 tty_ldisc_receive_buf+0x32b/0x390 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+0x381/0x910 drivers/tty/tty_buffer.c:533
 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:296
=====================================================
=====================================================
BUG: KMSAN: uninit-value in hci_conn_complete_evt net/bluetooth/hci_event.c:2615 [inline]
BUG: KMSAN: uninit-value in hci_event_packet+0x1294c/0x39e50 net/bluetooth/hci_event.c:6153
CPU: 0 PID: 1973 Comm: kworker/u5:0 Tainted: G    B             5.11.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci2 hci_rx_work
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 hci_conn_complete_evt net/bluetooth/hci_event.c:2615 [inline]
 hci_event_packet+0x1294c/0x39e50 net/bluetooth/hci_event.c:6153
 hci_rx_work+0x744/0xcf0 net/bluetooth/hci_core.c:4971
 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:296

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
 kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76
 slab_alloc_node mm/slub.c:2907 [inline]
 __kmalloc_node_track_caller+0xa37/0x1430 mm/slub.c:4527
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x2f8/0xb30 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1099 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:389 [inline]
 bcsp_recv+0x14f0/0x20d0 drivers/bluetooth/hci_bcsp.c:673
 hci_uart_tty_receive+0x3a9/0x790 drivers/bluetooth/hci_ldisc.c:614
 tty_ldisc_receive_buf+0x32b/0x390 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+0x381/0x910 drivers/tty/tty_buffer.c:533
 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:296
=====================================================
Bluetooth: hci2: sending frame failed (-49)
Bluetooth: hci2: sending frame failed (-49)