============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
syz.3.2920/16027 is trying to acquire lock:
ffff88810ed91158 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}, at: sch_direct_xmit+0x153/0x4b0

but task is already holding lock:
ffff88802218fd58 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}, at: sch_direct_xmit+0x153/0x4b0

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

       CPU0
       ----
  lock(&qdisc_xmit_lock_key#4);
  lock(&qdisc_xmit_lock_key#4);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

14 locks held by syz.3.2920/16027:
 #0: ffff88803cf14178 (&ima_iint_mutex_key[depth]#2){+.+.}-{4:4}, at: process_measurement+0x74b/0x1a40
 #1: ffffc90000007be0 ((&ndev->rs_timer)){+.-.}-{0:0}, at: call_timer_fn+0xbe/0x5f0
 #2: ffffffff8e139ea0 (rcu_read_lock){....}-{1:3}, at: ndisc_send_skb+0x20c/0x1440
 #3: ffffffff8e139ea0 (rcu_read_lock){....}-{1:3}, at: ip6_finish_output2+0x701/0x16a0
 #4: ffffffff8e139f00 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x27b/0x3b50
 #5: ffffffff8e139ea0 (rcu_read_lock){....}-{1:3}, at: bond_start_xmit+0xf8/0x1a10
 #6: ffffffff8e139f00 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x27b/0x3b50
 #7: ffff88810a26f258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#3){+...}-{3:3}, at: __dev_queue_xmit+0x138a/0x3b50
 #8: ffff88802218fd58 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}, at: sch_direct_xmit+0x153/0x4b0
 #9: ffffffff8e139ea0 (rcu_read_lock){....}-{1:3}, at: ip_output+0x60/0x3c0
 #10: ffffffff8e139ea0 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2+0x452/0x1160
 #11: ffffffff8e139ea0 (rcu_read_lock){....}-{1:3}, at: arp_xmit+0x23/0x270
 #12: ffffffff8e139f00 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x27b/0x3b50
 #13: ffff888118796258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#3){+...}-{3:3}, at: __dev_queue_xmit+0x138a/0x3b50

stack backtrace:
CPU: 0 UID: 0 PID: 16027 Comm: syz.3.2920 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <IRQ>
 dump_stack_lvl+0x189/0x250
 print_deadlock_bug+0x28b/0x2a0
 validate_chain+0x1a3f/0x2140
 __lock_acquire+0xab9/0xd20
 lock_acquire+0x120/0x360
 _raw_spin_lock+0x2e/0x40
 sch_direct_xmit+0x153/0x4b0
 __dev_queue_xmit+0x1857/0x3b50
 NF_HOOK+0x310/0x3a0
 arp_xmit+0x16c/0x270
 arp_solicit+0xc1d/0xe60
 __neigh_event_send+0xf70/0x1560
 neigh_resolve_output+0x198/0x750
 ip_finish_output2+0xd40/0x1160
 ip_output+0x2a1/0x3c0
 iptunnel_xmit+0x592/0xa40
 ip_tunnel_xmit+0x1c41/0x2390
 gre_tap_xmit+0x590/0x7a0
 dev_hard_start_xmit+0x2d7/0x830
 sch_direct_xmit+0x241/0x4b0
 __dev_queue_xmit+0x1857/0x3b50
 bond_dev_queue_xmit+0x10b/0x1e0
 bond_start_xmit+0x779/0x1a10
 dev_hard_start_xmit+0x2d7/0x830
 __dev_queue_xmit+0x1b8d/0x3b50
 ip6_finish_output2+0x11bc/0x16a0
 ndisc_send_skb+0xb54/0x1440
 addrconf_rs_timer+0x369/0x670
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:sha256_blocks_generic+0xae2/0x1b70
Code: c7 07 31 ca 41 31 d7 48 8b 4c 24 78 44 89 f3 44 31 eb 89 7c 24 2c 21 fb 44 31 eb 44 03 99 a8 1e e3 8b 44 03 9c 0c a8 01 00 00 <48> 8b 84 24 b0 00 00 00 42 0f b6 04 00 84 c0 0f 85 57 04 00 00 41
RSP: 0018:ffffc90007356f20 EFLAGS: 00000282
RAX: 000000006d956118 RBX: 000000008de64bb3 RCX: 0000000000000020
RDX: 00000000ab27d9de RSI: 000000003c8b5101 RDI: 0000000001f9ba79
RBP: ffffc90007357258 R08: dffffc0000000000 R09: 0000000072a7bd3e
R10: 00000000cc178a34 R11: 0000000097ec50f1 R12: 00000000c8c603a1
R13: 000000008d86e99b R14: 000000005fe04a37 R15: 0000000057fae55e
 __sha256_update+0xf7/0x150
 crypto_sha256_update+0x27/0x40
 ima_calc_file_hash+0x8a0/0x16f0
 ima_collect_measurement+0x428/0x8e0
 process_measurement+0x1121/0x1a40
 ima_file_mmap+0x1a2/0x1f0
 security_mmap_file+0x7a4/0xa60
 vm_mmap_pgoff+0x129/0x4d0
 ksys_mmap_pgoff+0x587/0x760
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2b1078ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2b11514038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f2b109b5fa0 RCX: 00007f2b1078ebe9
RDX: 0000000000000004 RSI: 0000000000004000 RDI: 0000200000200000
RBP: 00007f2b10811e19 R08: ffffffffffffffff R09: 0000000037000000
R10: 000200000006c832 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2b109b6038 R14: 00007f2b109b5fa0 R15: 00007ffe5f21ce58
 </TASK>
