Re: [syzbot] [btrfs?] BUG: corrupted list in btrfs_free_compr_folio

[David Sterba]

On Mon, Mar 16, 2026 at 06:40:28AM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    f338e7738378 Linux 7.0-rc4
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=15265602580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=d46eab0cfd31c214
> dashboard link: https://syzkaller.appspot.com/bug?extid=3c4d8371d65230f852a2
> compiler:       Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
> 
> Unfortunately, I don't have any reproducer for this issue yet.
> 
> Downloadable assets:
> disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-f338e773.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/2567fb35ebfb/vmlinux-f338e773.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/f9124de81ddb/bzImage-f338e773.xz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+3c4d8371d65230f852a2@xxxxxxxxxxxxxxxxxxxxxxxxx

syz: fix: btrfs: zlib: handle page aligned compressed size correctly