INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 1 PID: 14642 Comm: syz-executor.1 Not tainted 4.14.218-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack syzkaller/managers/linux-4-14/kernel/lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 syzkaller/managers/linux-4-14/kernel/lib/dump_stack.c:58
 register_lock_class+0x32b/0x1320 syzkaller/managers/linux-4-14/kernel/kernel/locking/lockdep.c:768
 __lock_acquire+0x167/0x3f20 syzkaller/managers/linux-4-14/kernel/kernel/locking/lockdep.c:3378
 lock_acquire+0x170/0x3f0 syzkaller/managers/linux-4-14/kernel/kernel/locking/lockdep.c:3998
 __raw_spin_lock_bh syzkaller/managers/linux-4-14/kernel/./include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x2f/0x40 syzkaller/managers/linux-4-14/kernel/kernel/locking/spinlock.c:176
 spin_lock_bh syzkaller/managers/linux-4-14/kernel/./include/linux/spinlock.h:322 [inline]
 lock_sock_nested+0x39/0x100 syzkaller/managers/linux-4-14/kernel/net/core/sock.c:2788
 l2cap_sock_teardown_cb+0x93/0x650 syzkaller/managers/linux-4-14/kernel/net/bluetooth/l2cap_sock.c:1341
 l2cap_chan_del+0xaf/0x950 syzkaller/managers/linux-4-14/kernel/net/bluetooth/l2cap_core.c:599
 l2cap_conn_del+0x36e/0x690 syzkaller/managers/linux-4-14/kernel/net/bluetooth/l2cap_core.c:1729
 l2cap_disconn_cfm syzkaller/managers/linux-4-14/kernel/net/bluetooth/l2cap_core.c:7441 [inline]
 l2cap_disconn_cfm+0x7c/0xb0 syzkaller/managers/linux-4-14/kernel/net/bluetooth/l2cap_core.c:7434
 hci_disconn_cfm syzkaller/managers/linux-4-14/kernel/./include/net/bluetooth/hci_core.h:1226 [inline]
 hci_conn_hash_flush+0x127/0x260 syzkaller/managers/linux-4-14/kernel/net/bluetooth/hci_conn.c:1393
 hci_dev_do_close+0x535/0xca0 syzkaller/managers/linux-4-14/kernel/net/bluetooth/hci_core.c:1620
 hci_rfkill_set_block+0xaf/0x120 syzkaller/managers/linux-4-14/kernel/net/bluetooth/hci_core.c:2050
 rfkill_set_block+0x1b2/0x4a0 syzkaller/managers/linux-4-14/kernel/net/rfkill/core.c:337
 rfkill_fop_write+0x1b6/0x3c0 syzkaller/managers/linux-4-14/kernel/net/rfkill/core.c:1233
 __vfs_write+0xe4/0x630 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:480
 vfs_write+0x17f/0x4d0 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:544
 SYSC_write syzkaller/managers/linux-4-14/kernel/fs/read_write.c:590 [inline]
 SyS_write+0xf2/0x210 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:582
 do_syscall_64+0x1d5/0x640 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x465b09
RSP: 002b:00007f1f669ae188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09
RDX: 0000000000000008 RSI: 0000000020000000 RDI: 0000000000000005
RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffe4603a54f R14: 00007f1f669ae300 R15: 0000000000022000
can: request_module (can-proto-6) failed.
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 14697 Comm: syz-executor.5 Not tainted 4.14.218-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88804ee36280 task.stack: ffff88805d5e8000
RIP: 0010:__read_once_size syzkaller/managers/linux-4-14/kernel/./include/linux/compiler.h:183 [inline]
RIP: 0010:atomic64_read syzkaller/managers/linux-4-14/kernel/./arch/x86/include/asm/atomic64_64.h:22 [inline]
RIP: 0010:atomic_long_read syzkaller/managers/linux-4-14/kernel/./include/asm-generic/atomic-long.h:45 [inline]
RIP: 0010:filp_close+0x26/0x140 syzkaller/managers/linux-4-14/kernel/fs/open.c:1152
RSP: 0018:ffff88805d5efe80 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: ffff8880a84ae7a0 RCX: 0000000000000000
RDX: 000000002000000d RSI: ffff888092fd1080 RDI: 000000010000006f
RBP: 00000000ffffffff R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88804ee36280 R12: ffff888092fd1080
R13: ffff888056af1310 R14: ffff888092fd1140 R15: 00000000ffffffff
FS:  0000000001f87400(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feab355d000 CR3: 0000000097007000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __close_fd+0x151/0x230 syzkaller/managers/linux-4-14/kernel/fs/file.c:639
 SYSC_close syzkaller/managers/linux-4-14/kernel/fs/open.c:1177 [inline]
 SyS_close+0x42/0x90 syzkaller/managers/linux-4-14/kernel/fs/open.c:1175
 do_syscall_64+0x1d5/0x640 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x418e1b
RSP: 002b:00007fffec207f70 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 0000000000418e1b
RDX: ffffffffffffffbc RSI: 0000001b2fc200a4 RDI: 0000000000000012
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2fc200ac
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000056c9e0
R13: 000000000002f213 R14: 000000000056c9e0 R15: 000000000056c008
Code: 00 00 00 00 90 41 55 41 54 49 89 f4 55 48 89 fd 53 e8 cf 39 cf ff 48 8d 7d 70 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f7 00 00 00 48 8b 45 70 48 85 c0 0f 84 dd 59 
RIP: __read_once_size syzkaller/managers/linux-4-14/kernel/./include/linux/compiler.h:183 [inline] RSP: ffff88805d5efe80
RIP: atomic64_read syzkaller/managers/linux-4-14/kernel/./arch/x86/include/asm/atomic64_64.h:22 [inline] RSP: ffff88805d5efe80
RIP: atomic_long_read syzkaller/managers/linux-4-14/kernel/./include/asm-generic/atomic-long.h:45 [inline] RSP: ffff88805d5efe80
RIP: filp_close+0x26/0x140 syzkaller/managers/linux-4-14/kernel/fs/open.c:1152 RSP: ffff88805d5efe80
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP:           (null)
PGD a9970067 P4D a9970067 PUD 96941067 PMD 0 
Oops: 0010 [#2] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 14642 Comm: syz-executor.1 Tainted: G      D         4.14.218-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88809520a000 task.stack: ffff888053f40000
RIP: 0010:          (null)
---[ end trace 4a86e886ef205e14 ]---
RSP: 0018:ffff888053f47a48 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000067 RCX: ffffc9000a8f2000
RDX: 1ffff1100ad5e2d1 RSI: ffffffff8668f617 RDI: ffff888056af1280
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88823fff704f
R10: ffff88823fff7057 R11: 0000002e610606c5 R12: ffff8880aa8936c0
R13: ffff888056af1280 R14: ffff888056aea9c0 R15: 0000000000000067
FS:  00007f1f669ae700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033