==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x3d4d/0x3e00 kernel/locking/lockdep.c:3305
Read of size 8 at addr ffff8801d87d15a0 by task syzkaller770014/12245

CPU: 1 PID: 12245 Comm: syzkaller770014 Not tainted 4.15.0-rc9+ #277
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53