Re: [syzbot] [xfs?] KASAN: stack-out-of-bounds Read in xfs_buf_lock

[syzbot]

syzbot has bisected this issue to:

commit 679a99495b8fda800037b25af8cd990eb7dd72c9
Author: Christoph Hellwig <hch@xxxxxx>
Date:   Mon Nov 29 10:21:41 2021 +0000

    xfs: factor out a xfs_setup_dax_always helper

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17708805480000
start commit:   7dd4b804e080 Merge tag 'nfsd-6.2-3' of git://git.kernel.or..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=14f08805480000
console output: https://syzkaller.appspot.com/x/log.txt?x=10f08805480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2b6ecad960fc703e
dashboard link: https://syzkaller.appspot.com/bug?extid=0bc698a422b5e4ac988c
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10c58bd2480000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11cc664a480000

Reported-by: syzbot+0bc698a422b5e4ac988c@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 679a99495b8f ("xfs: factor out a xfs_setup_dax_always helper")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection