INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. CPU: 1 PID: 11381 Comm: syz-executor.1 Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 assign_lock_key kernel/locking/lockdep.c:935 [inline] register_lock_class+0x106b/0x1170 kernel/locking/lockdep.c:1247 __lock_acquire+0x106/0x54c0 kernel/locking/lockdep.c:4779 lock_acquire kernel/locking/lockdep.c:5510 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:359 [inline] lock_sock_nested+0x40/0x120 net/core/sock.c:3063 l2cap_sock_teardown_cb+0xa1/0x660 net/bluetooth/l2cap_sock.c:1520 l2cap_chan_del+0xbc/0xa80 net/bluetooth/l2cap_core.c:618 l2cap_conn_del+0x3c0/0x7b0 net/bluetooth/l2cap_core.c:1896 l2cap_disconn_cfm net/bluetooth/l2cap_core.c:8168 [inline] l2cap_disconn_cfm+0x98/0xd0 net/bluetooth/l2cap_core.c:8161 hci_disconn_cfm include/net/bluetooth/hci_core.h:1486 [inline] hci_conn_hash_flush+0x127/0x260 net/bluetooth/hci_conn.c:1598 hci_dev_do_close+0x569/0x1110 net/bluetooth/hci_core.c:1778 hci_unregister_dev+0x263/0x1130 net/bluetooth/hci_core.c:3989 vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:340 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:140 exit_task_work include/linux/task_work.h:30 [inline] do_exit+0xbfc/0x2a60 kernel/exit.c:825 do_group_exit+0x125/0x310 kernel/exit.c:922 __do_sys_exit_group kernel/exit.c:933 [inline] __se_sys_exit_group kernel/exit.c:931 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465f69 Code: Unable to access opcode bytes at RIP 0x465f3f. RSP: 002b:00007ffcd43cd148 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007ffcd43cd300 RCX: 0000000000465f69 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043 RBP: 0000000000000000 R08: 0000000000000025 R09: 00007ffcd43cd300 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004bfa60 R13: 000000000000001c R14: 00000000ffffffff R15: 00007ffcd43cd340 kernel tried to execute NX-protected page - exploit attempt? (uid: 0) BUG: unable to handle page fault for address: ffff88801bdb8100 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0011) - permissions violation PGD 10401067 P4D 10401067 PUD 10402067 PMD 2b6fa063 PTE 800000001bdb8163 Oops: 0011 [#1] PREEMPT SMP KASAN CPU: 1 PID: 11381 Comm: syz-executor.1 Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0xffff88801bdb8100 Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 60 74 a0 5e 80 88 ff ff 10 81 db 1b 80 88 RSP: 0018:ffffc9000186f9f8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88805ea07000 RCX: 0000000000000000 RDX: 1ffff1100bd40e8c RSI: ffffffff87fc98db RDI: ffff88805ea07000 RBP: 0000000000000000 R08: ffffffff8a7ced40 R09: ffffffff87fc9546 R10: 0000000000000004 R11: 0000000000000005 R12: 0000000000000067 R13: ffff88805f1b0000 R14: ffff88805f1b04b8 R15: 0000000000000067 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88801bdb8100 CR3: 0000000057759000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Modules linked in: CR2: ffff88801bdb8100 ---[ end trace 97491f9b943ae4d7 ]--- RIP: 0010:0xffff88801bdb8100 Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 60 74 a0 5e 80 88 ff ff 10 81 db 1b 80 88 RSP: 0018:ffffc9000186f9f8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88805ea07000 RCX: 0000000000000000 RDX: 1ffff1100bd40e8c RSI: ffffffff87fc98db RDI: ffff88805ea07000 RBP: 0000000000000000 R08: ffffffff8a7ced40 R09: ffffffff87fc9546 R10: 0000000000000004 R11: 0000000000000005 R12: 0000000000000067 R13: ffff88805f1b0000 R14: ffff88805f1b04b8 R15: 0000000000000067 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88801bdb8100 CR3: 0000000057759000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400