On Sun, 16 Feb 2025, Milan Broz wrote:
> In Inline mode, the journal is unused, and journal_sectors is zero.
>
> Calculating the journal watermark requires dividing by journal_sectors,
> which should be done only if the journal is configured.
>
> Otherwise, a simple table query (dmsetup table) can cause OOPS.
>
> This bug did not show on some systems, perhaps only due to
> compiler optimization.
>
> On my 32-bit testing machine, this reliably crashes with the following:
>
> : Oops: divide error: 0000 [#1] PREEMPT SMP
> : CPU: 0 UID: 0 PID: 2450 Comm: dmsetup Not tainted 6.14.0-rc2+ #959
> : EIP: dm_integrity_status+0x2f8/0xab0 [dm_integrity]
> ...
>
> Signed-off-by: Milan Broz <gmazyl...@gmail.com>
> Fixes: fb0987682c62 ("dm-integrity: introduce the Inline mode")
> Cc: sta...@vger.kernel.org # 6.11+
Both patches applied, thanks.
Mikulas
