binder: 31976:31979 unknown command 5

================================================
WARNING: lock held when returning to user space!
4.18.0+ #100 Not tainted
binder: 31976:31979 ioctl c0306201 20008fd0 returned -22
------------------------------------------------
syz-executor1/31963 is leaving the kernel with locks still held!
1 lock held by syz-executor1/31963:
 #0: 00000000fa22c0e3 (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0 fs/fuse/inode.c:363
validate_nla: 1 callbacks suppressed
netlink: 'syz-executor0': attribute type 21 has an invalid length.
binder: 31976:31979 Acquire 1 refcount change on invalid ref 0 ret -22
audit: type=1326 audit(1534711495.215:1606): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=31995 comm="syz-executor5" exe="/root/syz-executor5" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7f19ca9 code=0x0
netlink: 'syz-executor0': attribute type 21 has an invalid length.
audit: type=1326 audit(1534711495.354:1607): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=31995 comm="syz-executor5" exe="/root/syz-executor5" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7f19ca9 code=0x0
netlink: 'syz-executor0': attribute type 21 has an invalid length.
audit: type=1326 audit(1534711495.903:1608): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=32037 comm="syz-executor5" exe="/root/syz-executor5" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7f19ca9 code=0x0
netlink: 'syz-executor0': attribute type 21 has an invalid length.
audit: type=1326 audit(1534711498.241:1609): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=32069 comm="syz-executor5" exe="/root/syz-executor5" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7f19ca9 code=0x0
audit: type=1326 audit(1534711498.276:1610): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=32073 comm="syz-executor4" exe="/root/syz-executor4" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7fdfca9 code=0x0
netlink: 'syz-executor0': attribute type 21 has an invalid length.
netlink: 'syz-executor0': attribute type 21 has an invalid length.
audit: type=1326 audit(1534711498.487:1611): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=32097 comm="syz-executor5" exe="/root/syz-executor5" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7f19ca9 code=0x0
audit: type=1326 audit(1534711498.563:1612): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=32103 comm="syz-executor4" exe="/root/syz-executor4" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7fdfca9 code=0x0
netlink: 'syz-executor0': attribute type 21 has an invalid length.
audit: type=1326 audit(1534711499.065:1613): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=32142 comm="syz-executor4" exe="/root/syz-executor4" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7fdfca9 code=0x0
netlink: 'syz-executor0': attribute type 21 has an invalid length.
netlink: 'syz-executor0': attribute type 21 has an invalid length.
netlink: 'syz-executor0': attribute type 21 has an invalid length.
netlink: 'syz-executor0': attribute type 21 has an invalid length.
netlink: 'syz-executor0': attribute type 21 has an invalid length.
netlink: 'syz-executor0': attribute type 21 has an invalid length.
netlink: 'syz-executor0': attribute type 21 has an invalid length.
netlink: 'syz-executor0': attribute type 21 has an invalid length.
netlink: 'syz-executor0': attribute type 21 has an invalid length.