INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 1 PID: 14573 Comm: syz-executor1 Not tainted 4.17.0-rc4+ #71
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 assign_lock_key kernel/locking/lockdep.c:729 [inline]
 register_lock_class+0x1dd2/0x2630 kernel/locking/lockdep.c:755
 __lock_acquire+0x1a7/0x5140 kernel/locking/lockdep.c:3319
 lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144
 spin_lock include/linux/spinlock.h:310 [inline]
 ptr_ring_consume include/linux/ptr_ring.h:335 [inline]
 tun_ring_recv drivers/net/tun.c:2143 [inline]
 tun_do_read+0x18b1/0x29f0 drivers/net/tun.c:2182
 tun_chr_read_iter+0xe5/0x1e0 drivers/net/tun.c:2214
 call_read_iter include/linux/fs.h:1778 [inline]
 do_iter_readv_writev+0x764/0xa50 fs/read_write.c:678
 do_iter_read+0x273/0x660 fs/read_write.c:922
 compat_readv+0x186/0x220 fs/read_write.c:1167
 do_compat_preadv64+0x182/0x1b0 fs/read_write.c:1216
 __do_compat_sys_preadv fs/read_write.c:1236 [inline]
 __se_compat_sys_preadv fs/read_write.c:1230 [inline]
 __ia32_compat_sys_preadv+0xc7/0x140 fs/read_write.c:1230
 do_syscall_32_irqs_on arch/x86/entry/common.c:323 [inline]
 do_fast_syscall_32+0x345/0xf9b arch/x86/entry/common.c:394
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f5bcb9
RSP: 002b:00000000f5f360ac EFLAGS: 00000282 ORIG_RAX: 000000000000014d
RAX: ffffffffffffffda RBX: 0000000000000015 RCX: 0000000020000540
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000