syzbot

Bluetooth: hci4: Unexpected cc 0x7f09 with no status
Bluetooth: hci2: Unexpected cc 0x7f09 with no status
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WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x48a/0x840 kernel/printk/printk_ringbuffer.c:1278, CPU#1: kworker/u9:2/5926
Modules linked in:
CPU: 1 UID: 0 PID: 5926 Comm: kworker/u9:2 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: hci0 hci_rx_work
RIP: 0010:get_data+0x48a/0x840 kernel/printk/printk_ringbuffer.c:1278
Code: 83 c4 f8 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 07 84 c0 0f 85 ee 01 00 00 44 89 65 00 49 83 c5 08 eb 13 e8 87 d2 1e 00 90 <0f> 0b 90 eb 05 e8 7c d2 1e 00 45 31 ed 4c 89 e8 48 83 c4 28 5b 41
RSP: 0018:ffffc90004ddee80 EFLAGS: 00010293
RAX: ffffffff81a1aa59 RBX: 00003fffffffffff RCX: ffff88802e4f1e40
RDX: 0000000000000000 RSI: 00003fffffffffff RDI: 0000000000000000
RBP: 0000000000000012 R08: 0000000000000fd1 R09: 0000005873554a0d
R10: 0000005873554a0d R11: 0000172662000034 R12: 0000000000000012
R13: 0000000000000000 R14: ffffc90004ddefc8 R15: 1ffffffff1bcaa9e
FS:  0000000000000000(0000) GS:ffff888125feb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559378dc7d48 CR3: 0000000077712000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 copy_data kernel/printk/printk_ringbuffer.c:1857 [inline]
 prb_read kernel/printk/printk_ringbuffer.c:1966 [inline]
 _prb_read_valid+0x672/0xa90 kernel/printk/printk_ringbuffer.c:2143
 prb_read_valid+0x3c/0x60 kernel/printk/printk_ringbuffer.c:2215
 printk_get_next_message+0x15c/0x7b0 kernel/printk/printk.c:2978
 console_emit_next_record kernel/printk/printk.c:3065 [inline]
 console_flush_one_record kernel/printk/printk.c:3197 [inline]
 console_flush_all+0x4cc/0xb10 kernel/printk/printk.c:3271
 __console_flush_and_unlock kernel/printk/printk.c:3301 [inline]
 console_unlock+0xbb/0x190 kernel/printk/printk.c:3341
 vprintk_emit+0x4c5/0x590 kernel/printk/printk.c:2423
 _printk+0xcf/0x120 kernel/printk/printk.c:2448
 bt_err+0x10b/0x160 net/bluetooth/lib.c:296
 hci_cmd_complete_evt+0x794/0xa80 net/bluetooth/hci_event.c:4223
 hci_event_func net/bluetooth/hci_event.c:7629 [inline]
 hci_event_packet+0x78f/0x1260 net/bluetooth/hci_event.c:7686
 hci_rx_work+0x45d/0xfc0 net/bluetooth/hci_core.c:4099
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>