Re: [syzbot] [fs?] general protection fault in __umount_mnt

[Christian Brauner]

 On Fri, Mar 20, 2026 at 03:45:28PM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    8e42d2514a7e Add linux-next specific files for 20260318
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=10808cba580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=7f5b21566f9d8af6
> dashboard link: https://syzkaller.appspot.com/bug?extid=e4470cc28308f2081ec8
> compiler:       Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16eb72da580000
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/cb90c31a24db/disk-8e42d251.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/e0c08a5de437/vmlinux-8e42d251.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/d6b18a5e03f8/bzImage-8e42d251.xz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+e4470cc28308f2081ec8@xxxxxxxxxxxxxxxxxxxxxxxxx

#syz test: https://github.com/brauner/linux/tree/vfs-7.1.mount 14594a141c760dd4c462b38d73406e1b48e44b84