Re: WARNING: locking bug in split_huge_page_to_list

2019-04-23 Thread Matthew Wilcox
On Tue, Apr 23, 2019 at 09:13:06AM -0700, syzbot wrote: > DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) > WARNING: CPU: 0 PID: 1553 at kernel/locking/lockdep.c:3673 > __lock_acquire+0x1887/0x3fb0 kernel/locking/lockdep.c:3673 > down_write+0x38/0x90 kernel/locking/rwsem.c:70 > anon_vma_lock_wr

WARNING: locking bug in split_huge_page_to_list

2019-04-23 Thread syzbot
Hello, syzbot found the following crash on: HEAD commit:e53f31bf Merge tag '5.1-rc5-smb3-fixes' of git://git.samba.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14ecb7e320 kernel config: https://syzkaller.appspot.com/x/.config?x=856fc6d0fbbeede9 da