Re: [syzbot] [mm?] WARNING in __split_vma

[Andrew Morton]

On Thu, 27 Aug 2026 01:33:42 -0700 syzbot <syzbot+5c417b73ac02e0e352c4@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    818bebeb63dd drm/xe: Don't hand out the flat CCS storage a..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1645f979580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=ccca94d2c01b9e78
> dashboard link: https://syzkaller.appspot.com/bug?extid=5c417b73ac02e0e352c4
> compiler:       gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=104a0d49580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13f35979580000
> 
> Downloadable assets:
> disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-818bebeb.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/6e4100526b12/vmlinux-818bebeb.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/723c4783ee96/bzImage-818bebeb.xz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+5c417b73ac02e0e352c4@xxxxxxxxxxxxxxxxxxxxxxxxx

Thanks.

Hopefully fixed by the pending "mm/mremap: reset unfaulted VMA page
offset for MREMAP_DONTUNMAP".

https://lore.kernel.org/20260825-fix-mremap-dontunmap-pgoff-v1-1-39a40b2c98b3@xxxxxxxxxx