Re: [BUG] WARNING in ext4_journalled_invalidate_folio

[Farhad Alemi]

Attaching the reproducer; thanks!

On Fri, Aug 28, 2026 at 7:31 AM Theodore Tso <tytso@xxxxxxx> wrote:
>
> On Thu, Aug 27, 2026 at 10:45:30PM -0500, Farhad Alemi wrote:
> > Hello,
> >
> > As part of the kernel research at ASU's SEFCOM
> > lab, we hit the crash below. Crash reports can be found here:
> >
> >   https://github.com/farhad-alemi/public_bug_reports/tree/main/172-warning-in-ext4-journalled-invalidate-folio/
>
> Please send the reproducer.  Note that if it requries a maliciously
> fuzzed file system, we consider this to be a minor bug (especially if
> the maliciously file system would be fixed when the system
> administrator runs fsck on the file system first), and not "security"
> issue, so feel free to just send it to the list.
>
> Cheers,
>
>                                         - Ted

Attachment: reproducer.c
Description: Binary data