Re: [syzbot] [xfs?] KASAN: null-ptr-deref Write in xfs_filestream_select_ag

[syzbot]

syzbot suspects this issue was fixed by commit:

commit 6f861765464f43a71462d52026fbddfc858239a5
Author: Jan Kara <jack@xxxxxxx>
Date:   Wed Nov 1 17:43:10 2023 +0000

    fs: Block writes to mounted block devices

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=119af36be80000
start commit:   17214b70a159 Merge tag 'fsverity-for-linus' of git://git.k..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=d40f6d44826f6cf7
dashboard link: https://syzkaller.appspot.com/bug?extid=87466712bb342796810a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1492946ac80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12e45ad6c80000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: fs: Block writes to mounted block devices

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