Re: [PATCH v3 part1 0/4] Fix SG_IO ambiguity between READ SUBCHANNEL and UNMAP (and other similar cases)
From: Luis Henriques
Date: Wed Aug 27 2014 - 05:34:45 EST
On Thu, May 23, 2013 at 03:58:19PM +0200, Paolo Bonzini wrote:
> The SG_IO ioctl's command whitelist is designed for MMC devices (roughly,
> "play/burn CDs without requiring root") but some opcodes overlap across SCSI
> device classes and have different meanings for different classes.
> To fix this, use different bitmaps for the various device classes.
> This is CVE-2012-4542.
Sorry for bringing this old issue again, but I was wondering what
happen to this fix.
> v2->v3: patches are now split differently, according to Tejun's indications;
> added conflict on operation code A4h.
> Paolo Bonzini (4):
> sg_io: pass request_queue to blk_verify_command
> sg_io: prepare to introduce per-class command filters
> sg_io: use different default filters for each device class
> sg_io: resolve conflicts between commands assigned to multiple classes
> block/bsg.c | 2 +-
> block/scsi_ioctl.c | 193 +++++++++++++++++++++++++++--------------------
> drivers/scsi/scsi_scan.c | 2 +
> drivers/scsi/sg.c | 3 +-
> include/linux/blkdev.h | 5 +-
> 5 files changed, 118 insertions(+), 87 deletions(-)
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/