Re: [BUG] WARNING in ext4_journalled_invalidate_folio

Attaching the reproducer; thanks!

On Fri, Aug 28, 2026 at 7:31 AM Theodore Tso [off-list ref] wrote:

On Thu, Aug 27, 2026 at 10:45:30PM -0500, Farhad Alemi wrote:

quoted

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