BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 29973 Comm: syz.1.15471 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:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 register_lock_class+0x2a9/0x2e0
 __lock_acquire+0xad/0x2cf0
 lock_acquire+0x106/0x330
 touch_wq_lockdep_map+0xcb/0x180
 __flush_workqueue+0x14b/0x14f0
 drain_workqueue+0xd3/0x390
 destroy_workqueue+0xbb/0xc60
 __rds_conn_create+0x1aec/0x22d0
 rds_conn_create_outgoing+0x43/0x60
 rds_sendmsg+0x1033/0x2170
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x4d7/0x810
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1bd/0x2a0
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb26999acb9
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:00007fb26a787028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fb269c16090 RCX: 00007fb26999acb9
RDX: 0000000004000000 RSI: 00002000000002c0 RDI: 0000000000000003
RBP: 00007fb269a08bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb269c16128 R14: 00007fb269c16090 R15: 00007ffda478d4f8
 </TASK>
