INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 0 PID: 21564 Comm: syz-executor6 Not tainted 4.17.0-rc4+ #46
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_sys_pread64 fs/read_write.c:636 [inline]
 __se_sys_pread64 fs/read_write.c:633 [inline]
 __x64_sys_pread64+0x97/0xf0 fs/read_write.c:633
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4559e9
RSP: 002b:00007fd6bf855c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000011
RAX: ffffffffffffffda RBX: 00007fd6bf8566d4 RCX: 00000000004559e9
RDX: 0000000000000062 RSI: 0000000020000080 RDI: 0000000000000015
RBP: 000000000072bf50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000521 R14: 00000000006fbbb8 R15: 0000000000000001
CUSE: info not properly terminated
CUSE: info not properly terminated
kauditd_printk_skb: 10 callbacks suppressed
audit: type=1326 audit(1526293280.831:3): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=21732 comm="syz-executor7" exe="/root/syz-executor7" sig=9 arch=c000003e syscall=202 compat=0 ip=0x4559e9 code=0x0
CUSE: info not properly terminated
audit: type=1326 audit(1526293281.838:4): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=21732 comm="syz-executor7" exe="/root/syz-executor7" sig=9 arch=c000003e syscall=202 compat=0 ip=0x4559e9 code=0x0
CUSE: info not properly terminated
audit: type=1326 audit(1526293281.976:5): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=21808 comm="syz-executor7" exe="/root/syz-executor7" sig=9 arch=c000003e syscall=202 compat=0 ip=0x4559e9 code=0x0
audit: type=1326 audit(1526293282.058:6): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=21815 comm="syz-executor3" exe="/root/syz-executor3" sig=9 arch=c000003e syscall=202 compat=0 ip=0x4559e9 code=0x0
CUSE: info not properly terminated
audit: type=1326 audit(1526293282.149:7): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=21831 comm="syz-executor5" exe="/root/syz-executor5" sig=9 arch=c000003e syscall=202 compat=0 ip=0x4559e9 code=0x0
audit: type=1326 audit(1526293282.212:8): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=21836 comm="syz-executor1" exe="/root/syz-executor1" sig=9 arch=c000003e syscall=202 compat=0 ip=0x4559e9 code=0x0
audit: type=1326 audit(1526293282.290:9): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=21847 comm="syz-executor4" exe="/root/syz-executor4" sig=9 arch=c000003e syscall=202 compat=0 ip=0x4559e9 code=0x0
audit: type=1326 audit(1526293282.334:10): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=21850 comm="syz-executor0" exe="/root/syz-executor0" sig=9 arch=c000003e syscall=202 compat=0 ip=0x4559e9 code=0x0
audit: type=1326 audit(1526293283.036:11): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=21866 comm="syz-executor2" exe="/root/syz-executor2" sig=9 arch=c000003e syscall=202 compat=0 ip=0x4559e9 code=0x0
audit: type=1326 audit(1526293283.036:12): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=21865 comm="syz-executor6" exe="/root/syz-executor6" sig=9 arch=c000003e syscall=202 compat=0 ip=0x4559e9 code=0x0
kauditd_printk_skb: 17 callbacks suppressed
audit: type=1326 audit(1526293286.392:30): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=21978 comm="syz-executor7" exe="/root/syz-executor7" sig=9 arch=c000003e syscall=202 compat=0 ip=0x4559e9 code=0x0
audit: type=1326 audit(1526293287.417:31): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=21984 comm="syz-executor7" exe="/root/syz-executor7" sig=9 arch=c000003e syscall=202 compat=0 ip=0x4559e9 code=0x0