Re: [syzbot] [fs?] KASAN: null-ptr-deref Write in do_pagemap_cmd

[syzbot]

syzbot suspects this issue was fixed by commit:

commit 65c66047259fad1b868d4454bc5af95b46a5f954
Author: Penglei Jiang <superman.xpt@xxxxxxxxx>
Date:   Fri Apr 4 06:33:57 2025 +0000

    proc: fix the issue of proc_mem_open returning NULL

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1604cf0c580000
start commit:   80e54e84911a Linux 6.14-rc6
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=77b023e9ae0dbb6a
dashboard link: https://syzkaller.appspot.com/bug?extid=02e64be5307d72e9c309
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=101e3b8c580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11ec67a8580000

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

#syz fix: proc: fix the issue of proc_mem_open returning NULL

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