INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 1 PID: 10497 Comm: syz-executor0 Not tainted 4.17.0-rc4+ #67
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]
 new_sync_read fs/read_write.c:406 [inline]
 __vfs_read+0x696/0xa50 fs/read_write.c:418
 vfs_read+0x17f/0x3d0 fs/read_write.c:452
 ksys_pread64+0x174/0x1a0 fs/read_write.c:626
 __do_compat_sys_x86_pread arch/x86/ia32/sys_ia32.c:177 [inline]
 __se_compat_sys_x86_pread arch/x86/ia32/sys_ia32.c:174 [inline]
 __ia32_compat_sys_x86_pread+0xc4/0x130 arch/x86/ia32/sys_ia32.c:174
 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: 0023:0xf7fa1cb9
RSP: 002b:00000000f5f9d0ac EFLAGS: 00000282 ORIG_RAX: 00000000000000b4
RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 0000000020000080
RDX: 0000000000000062 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
sock: process `syz-executor7' is using obsolete setsockopt SO_BSDCOMPAT
sock: process `syz-executor6' is using obsolete setsockopt SO_BSDCOMPAT
sock: process `syz-executor7' is using obsolete setsockopt SO_BSDCOMPAT
sock: process `syz-executor5' is using obsolete setsockopt SO_BSDCOMPAT
sock: process `syz-executor7' is using obsolete setsockopt SO_BSDCOMPAT
sock: process `syz-executor5' is using obsolete setsockopt SO_BSDCOMPAT
netlink: 11 bytes leftover after parsing attributes in process `syz-executor6'.