On Wed, Sep 30, 2015 at 12:35:50AM +0000, Junichi Nomura wrote:
> With v4.3-rc3, stress testing of SCSI device addition/removal quickly
> trigger random crash in memory allocator (e.g. __kmalloc). I found that
> a commit 086b91d052eb ("scsi_dh: integrate into the core SCSI code")
> moved the call of scsi_dh->detach() to very early part of sdev tear down
> process (scsi_remove_device()). As a result, related data structure such
> as alua_dh_data can be freed while rtpg/stpg are still in-flight.
Hi Junichi,
the code should have been called from that early in the process before,
as it was called from the bus notifier that was called first in device_del.
While something in this series obviously caused the regression are you
sure it's exactly this patch?
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