BUG: unable to handle kernel paging request at ffffffff867922c8 PGD 9e6e067 P4D 9e6e067 PUD 9e6f063 PMD 66001e1 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 0 PID: 13048 Comm: syz-executor.0 Not tainted 4.19.204-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_atomic_inc arch/x86/include/asm/atomic.h:97 [inline] RIP: 0010:atomic_inc include/asm-generic/atomic-instrumented.h:110 [inline] RIP: 0010:__lock_acquire+0x256/0x3ff0 kernel/locking/lockdep.c:3308 Code: 00 49 8b 44 c6 08 48 85 c0 0f 84 38 ff ff ff 48 8d b8 38 01 00 00 be 04 00 00 00 48 89 44 24 10 e8 1f 4b 4d 00 48 8b 44 24 10 ff 80 38 01 00 00 49 8d b5 80 08 00 00 48 ba 00 00 00 00 00 fc RSP: 0018:ffff88803c097540 EFLAGS: 00010046 RAX: ffffffff86792190 RBX: 0000000000000000 RCX: ffffffff814b0891 RDX: fffffbfff0cf245a RSI: 0000000000000004 RDI: ffffffff867922c8 RBP: 0000000000000000 R08: 0000000000000001 R09: fffffbfff0cf2459 R10: ffffffff867922cb R11: 0000000000000000 R12: 0000000000000000 R13: ffff88803ce6a280 R14: ffff8880410a4a60 R15: 0000000000000001 FS: 00007f6287b04700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff867922c8 CR3: 00000000adf6f000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:168 spin_lock_bh include/linux/spinlock.h:334 [inline] lock_sock_nested+0x3b/0x110 net/core/sock.c:2864 l2cap_sock_teardown_cb+0xa0/0x6d0 net/bluetooth/l2cap_sock.c:1348 l2cap_chan_del+0xbc/0xa50 net/bluetooth/l2cap_core.c:603 l2cap_conn_del+0x3a6/0x6e0 net/bluetooth/l2cap_core.c:1733 l2cap_disconn_cfm net/bluetooth/l2cap_core.c:7445 [inline] l2cap_disconn_cfm+0x98/0xd0 net/bluetooth/l2cap_core.c:7438 hci_disconn_cfm include/net/bluetooth/hci_core.h:1263 [inline] hci_conn_hash_flush+0x127/0x260 net/bluetooth/hci_conn.c:1512 hci_dev_do_close+0x659/0xf10 net/bluetooth/hci_core.c:1673 hci_unregister_dev+0x14f/0x460 net/bluetooth/hci_core.c:3274 vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:354 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbf3/0x2be0 kernel/exit.c:870 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6287b04218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000056bf88 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88 RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c R13: 00007ffcc3f633ff R14: 00007f6287b04300 R15: 0000000000022000 Modules linked in: CR2: ffffffff867922c8 ---[ end trace ecd78c1121055e6b ]--- RIP: 0010:arch_atomic_inc arch/x86/include/asm/atomic.h:97 [inline] RIP: 0010:atomic_inc include/asm-generic/atomic-instrumented.h:110 [inline] RIP: 0010:__lock_acquire+0x256/0x3ff0 kernel/locking/lockdep.c:3308 Code: 00 49 8b 44 c6 08 48 85 c0 0f 84 38 ff ff ff 48 8d b8 38 01 00 00 be 04 00 00 00 48 89 44 24 10 e8 1f 4b 4d 00 48 8b 44 24 10 ff 80 38 01 00 00 49 8d b5 80 08 00 00 48 ba 00 00 00 00 00 fc RSP: 0018:ffff88803c097540 EFLAGS: 00010046 RAX: ffffffff86792190 RBX: 0000000000000000 RCX: ffffffff814b0891 RDX: fffffbfff0cf245a RSI: 0000000000000004 RDI: ffffffff867922c8 RBP: 0000000000000000 R08: 0000000000000001 R09: fffffbfff0cf2459 R10: ffffffff867922cb R11: 0000000000000000 R12: 0000000000000000 R13: ffff88803ce6a280 R14: ffff8880410a4a60 R15: 0000000000000001 FS: 00007f6287b04700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff867922c8 CR3: 00000000adf6f000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 49 8b 44 c6 08 mov 0x8(%r14,%rax,8),%rax 5: 48 85 c0 test %rax,%rax 8: 0f 84 38 ff ff ff je 0xffffff46 e: 48 8d b8 38 01 00 00 lea 0x138(%rax),%rdi 15: be 04 00 00 00 mov $0x4,%esi 1a: 48 89 44 24 10 mov %rax,0x10(%rsp) 1f: e8 1f 4b 4d 00 callq 0x4d4b43 24: 48 8b 44 24 10 mov 0x10(%rsp),%rax * 29: f0 ff 80 38 01 00 00 lock incl 0x138(%rax) <-- trapping instruction 30: 49 8d b5 80 08 00 00 lea 0x880(%r13),%rsi 37: 48 rex.W 38: ba 00 00 00 00 mov $0x0,%edx 3d: 00 fc add %bh,%ah