rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=0c9c/1/0x4000000000000000 softirq=47145/47146 fqs=5249
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     5283          0            0
rcu: 	cputime:      160          0        52315   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=43901 q=1287 ncpus=2)
CPU: 0 UID: 0 PID: 12979 Comm: syz.0.3181 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
RIP: 0010:debug_lockdep_rcu_enabled+0x29/0x40
Code: 90 f3 0f 1e fa 31 c0 83 3d 83 10 7e 04 00 74 1d 83 3d 5a 42 7e 04 00 74 14 65 48 8b 0d 58 c5 8a 07 31 c0 83 b9 9c 0b 00 00 00 <0f> 94 c0 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc
RSP: 0018:ffffc9000278f1d8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88811ffd9dc0
RDX: ffff88811ffd9dc0 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000004
R10: 0000000000000008 R11: 0000000000000002 R12: 1ffff1102405e3d3
R13: ffff88810a6c2600 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007ff21ebff6c0(0000) GS:ffff88818dc25000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31305ff8 CR3: 00000001612e2000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 rcu_read_lock_bh_held+0xa/0x50
 tcf_classify+0x4d0/0x1160
 hfsc_enqueue+0x322/0xf50
 dev_qdisc_enqueue+0x4e/0x260
 __dev_queue_xmit+0x1b40/0x37f0
 packet_sendmsg+0x3d95/0x5040
 sock_sendmsg_nosec+0x13a/0x180
 ____sys_sendmsg+0x54e/0x850
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1b1/0x290
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff21dd9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff21ebff028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ff21e015fa0 RCX: 00007ff21dd9ce59
RDX: 0000000000000005 RSI: 0000200000000300 RDI: 0000000000000009
RBP: 00007ff21de32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff21e016038 R14: 00007ff21e015fa0 R15: 00007ffe2c6ff3a8
 </TASK>
