On Wed, Mar 28, 2018 at 05:37:24PM -0400, Tony Battersby wrote:
> The SCSI generic driver is currently broken in the 3.18, 4.1, 4.4, and
> 4.9 stable kernels. This is the problematic commit:
>
> 109bade9c625 ("scsi: sg: use standard lists for sg_requests")
>
> (all commit ids are from upstream git, not stable.git)
>
> There have already been a number of fixes backported to -stable to fix
> problems introduced by that commit:
>
> bd46fc406b30 ("scsi: sg: off by one in sg_ioctl()")
> 4759df905a47 ("scsi: sg: factor out sg_fill_request_table()")
> 3e0097499839 ("scsi: sg: fixup infoleak when using SG_GET_REQUEST_TABLE")
> 587c3c9f286c ("scsi: sg: Re-fix off by one in sg_fill_request_table()")
>
> I am not sure why 109bade9c625 was added to -stable to begin with. My
> guess is that the "infoleak" fix was flagged as being appropriate for
> -stable, and it depended on the original commit 109bade9c625. But if
> you take a close look, the original commit 109bade9c625 is what
> introduced the infoleak in the first place. Or maybe there was some
> other reason. But I digress.
>
> There is one more fix for 109bade9c625 that has not yet been backported:
>
> 48ae8484e9fc ("scsi: sg: don't return bogus Sg_requests")
>
> Without the fix above, sg oopses as soon as I try to use it. So please
> add 48ae8484e9fc to -stable.
>
> The following -stable kernels already have 48ae8484e9fc:
> 4.14.31
> 4.15.14
>
> The following -stable kernels need 48ae8484e9fc:
> 3.18.102
> 4.1.51
> 4.4.125
> 4.9.91
Now queued up for 4.9.y, 4.4.y, and 3.18.y, thanks!
greg k-h