netlink: 'syz-executor.3': attribute type 11 has an invalid length.
============================================
WARNING: possible recursive locking detected
5.11.0-rc5-syzkaller #0 Not tainted
--------------------------------------------
syz-executor.3/750 is trying to acquire lock:
ffff88811f6085e8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5267 [inline]
ffff88811f6085e8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: cfg80211_netdev_notifier_call+0x28a/0x5b0 net/wireless/core.c:1407

but task is already holding lock:
ffff88811f6085e8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5267 [inline]
ffff88811f6085e8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: nl80211_pre_doit+0xc1/0x160 net/wireless/nl80211.c:14837

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&rdev->wiphy.mtx);
  lock(&rdev->wiphy.mtx);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

3 locks held by syz-executor.3/750:
 #0: ffffffff852a2eb0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x10/0x30 net/netlink/genetlink.c:810
 #1: ffffffff85288d48 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0x13/0x160 net/wireless/nl80211.c:14793
 #2: ffff88811f6085e8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5267 [inline]
 #2: ffff88811f6085e8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: nl80211_pre_doit+0xc1/0x160 net/wireless/nl80211.c:14837

stack backtrace:
CPU: 0 PID: 750 Comm: syz-executor.3 Not tainted 5.11.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x77/0x97 lib/dump_stack.c:120
 print_deadlock_bug kernel/locking/lockdep.c:2829 [inline]
 check_deadlock kernel/locking/lockdep.c:2872 [inline]
 validate_chain kernel/locking/lockdep.c:3661 [inline]
 __lock_acquire.cold.75+0x165/0x2be kernel/locking/lockdep.c:4899
 lock_acquire+0xd0/0x3e0 kernel/locking/lockdep.c:5509
 __mutex_lock_common kernel/locking/mutex.c:956 [inline]
 __mutex_lock+0x94/0xa00 kernel/locking/mutex.c:1103
 wiphy_lock include/net/cfg80211.h:5267 [inline]
 cfg80211_netdev_notifier_call+0x28a/0x5b0 net/wireless/core.c:1407
 notifier_call_chain+0x2f/0x90 kernel/notifier.c:83
 call_netdevice_notifiers_extack net/core/dev.c:2052 [inline]
 call_netdevice_notifiers net/core/dev.c:2066 [inline]
 unregister_netdevice_many+0x11d/0x6d0 net/core/dev.c:10704
 unregister_netdevice_queue+0xc6/0x100 net/core/dev.c:10638
 register_netdevice+0x55a/0x630 net/core/dev.c:10013
 cfg80211_register_netdevice+0x4f/0x110 net/wireless/core.c:1349
 ieee80211_if_add+0x571/0x9e0 net/mac80211/iface.c:1990
 ieee80211_add_iface+0x38/0x90 net/mac80211/cfg.c:125
 rdev_add_virtual_intf net/wireless/rdev-ops.h:45 [inline]
 nl80211_new_interface+0x1b4/0x540 net/wireless/nl80211.c:3977
 genl_family_rcv_msg_doit.isra.17+0x102/0x140 net/netlink/genetlink.c:739
 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
 genl_rcv_msg+0xd8/0x1e0 net/netlink/genetlink.c:800
 netlink_rcv_skb+0x49/0xf0 net/netlink/af_netlink.c:2494
 genl_rcv+0x1f/0x30 net/netlink/genetlink.c:811
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x19a/0x270 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x248/0x480 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:654 [inline]
 sock_sendmsg+0x2b/0x40 net/socket.c:674
 ____sys_sendmsg+0x1ed/0x230 net/socket.c:2350
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2404
 __sys_sendmsg+0x52/0xa0 net/socket.c:2437
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fdfbd3afc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219
RDX: 0000000000000000 RSI: 0000000020000400 RDI: 0000000000000004
RBP: 000000000119c110 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc
R13: 00007ffd1315af0f R14: 00007fdfbd3b09c0 R15: 000000000119c0dc