=====================================================
BUG: KMSAN: uninit-value in vsscanf+0x3dbc/0x4400 lib/vsprintf.c:3649
 vsscanf+0x3dbc/0x4400 lib/vsprintf.c:3649
 sscanf+0x206/0x250 lib/vsprintf.c:3702
 get_l2cap_conn+0x1d6/0x760 net/bluetooth/6lowpan.c:960
 lowpan_control_write+0x31d/0xf70 net/bluetooth/6lowpan.c:1100
 full_proxy_write+0x2c2/0x440 fs/debugfs/file.c:236
 vfs_write+0x8ce/0x2030 fs/read_write.c:588
 ksys_write+0x28b/0x510 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __ia32_sys_write+0xdb/0x120 fs/read_write.c:652
 do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline]
 __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:180
 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c

Local variable page created at:
 get_futex_key+0xc4/0x1e60
 futex_wait_setup+0x140/0x560 kernel/futex/waitwake.c:602

CPU: 1 PID: 8093 Comm: syz-executor.4 Tainted: G        W         5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
=====================================================